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  Coating Ring-down Measurement Lab elog, Page 4 of 18  Not logged in ELOG logo
ID Date Author Type Categorydown Subject
  302   Thu Feb 9 14:49:51 2017 GabrieleGeneralMeasurementsS1600489 S1600490 S1600491 S1600492

2017-02-09

  • 2:30pm, samples installed in the chamber:
    • S1600489 in bay 1
    • S1600490 in bay 2
    • S1600491 in bay 3
    • S1600492 in bay 4
  • 2:35pm, roughing pump on
  • 2:45pm, pressure is <1 Torr, turbo pump on
  • 4:19pm, pressure is 7.2e-6:
    • but I forgot to clamp the lid!
    • added four clamps at 4:22pm
    • pressure seems to be going down again
  • Excitations
    • Quiet time before excitation: 1170737383
      Excitation (broad band) at 1170737418 (60 s)
      Quiet time after excitation: 1170737483

    • Quiet time before excitation: 1170739313
      Excitation (broad band) at 1170739349 (60 s)
      Quiet time after excitation: 1170739414

    • Quiet time before excitation: 1170741244
      Excitation (broad band) at 1170741279 (60 s)
      Quiet time after excitation: 1170741344

    • Quiet time before excitation: 1170743174
      Excitation (broad band) at 1170743210 (60 s)
      Quiet time after excitation: 1170743275

    • Quiet time before excitation: 1170745105
      Excitation (broad band) at 1170745140 (60 s)
      Quiet time after excitation: 1170745205

    • Quiet time before excitation: 1170747035
      Excitation (broad band) at 1170747070 (60 s)
      Quiet time after excitation: 1170747135

    • Quiet time before excitation: 1170748965
      Excitation (broad band) at 1170749000 (60 s)
      Quiet time after excitation: 1170749065

    • Quiet time before excitation: 1170750896
      Excitation (broad band) at 1170750931 (60 s)
      Quiet time after excitation: 1170750996

2017-02-10

  • 11:37am, gate valve closed, pumps off, venting

2017-10-13

  • 8:30am, in chamber, balanced
    • S1600492 in bay 1
    • S1600491 in bay 2
    • S1600490 in bay 3
    • S1600489 in bay 4
  • 8:34am roughing pump on, clamps on lid
  • 8:46am turbo pump on
  • Excitations
    • Quiet time before excitation: 1171048567
      Excitation (broad band) at 1171048602 (60 s)
      Quiet time after excitation: 1171048667

    • Quiet time before excitation: 1171049897
      Excitation (broad band) at 1171049933 (60 s)
      Quiet time after excitation: 1171049997

    • Quiet time before excitation: 1171051227
      Excitation (broad band) at 1171051262 (60 s)
      Quiet time after excitation: 1171051327

    • Quiet time before excitation: 1171052557
      Excitation (broad band) at 1171052592 (60 s)
      Quiet time after excitation: 1171052657

    • Quiet time before excitation: 1171053887
      Excitation (broad band) at 1171053922 (60 s)
      Quiet time after excitation: 1171053987

    • Quiet time before excitation: 1171055217
      Excitation (broad band) at 1171055252 (60 s)
      Quiet time after excitation: 1171055317

    • Quiet time before excitation: 1171056547
      Excitation (broad band) at 1171056582 (60 s)
      Quiet time after excitation: 1171056647

    • Quiet time before excitation: 1171057877
      Excitation (broad band) at 1171057912 (60 s)
      Quiet time after excitation: 1171057977

  • Chamber opened at about 2:30pm, samples out
  306   Tue Feb 14 14:47:00 2017 GabrieleGeneralMeasurementsS1600495

2017-02-14

  • 2:32pm, in chamber (CR0), balanced
  • 2:33pm roughing pump on
  • 2:45pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1171161389
      Excitation (broad band) at 1171161421 (60 s)
      Quiet time after excitation: 1171161483

    • Quiet time before excitation: 1171172313
      Excitation (broad band) at 1171172345 (60 s)
      Quiet time after excitation: 1171172407

    • Quiet time before excitation: 1171183237
      Excitation (broad band) at 1171183269 (60 s)
      Quiet time after excitation: 1171183331

    • Quiet time before excitation: 1171194161
      Excitation (broad band) at 1171194193 (60 s)
      Quiet time after excitation: 1171194255

    • Quiet time before excitation: 1171205085
      Excitation (broad band) at 1171205117 (60 s)
      Quiet time after excitation: 1171205179

2017-02-15

  • 3:19pm, pumps stopped, venting
  307   Tue Feb 14 15:50:23 2017 GabrieleGeneralMeasurementsS1600519 S1600520 S1600521 S1600522

New substrates from Mark Optics, round, with polished edges

2017-02-14

  • 3:35pm in new chamber
    • S1600519 in bay 1
    • S1600520 in bay 2
    • S1600521 in bay 3
    • S1600522 in bay 4
  • 3:38pm, roughing pump on, clamps on
  • 3:48pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1171158544
      Excitation (broad band) at 1171158579 (60 s)
      Quiet time after excitation: 1171158644

    • Quiet time before excitation: 1171173074
      Excitation (broad band) at 1171173109 (60 s)
      Quiet time after excitation: 1171173174

    • Quiet time before excitation: 1171187604
      Excitation (broad band) at 1171187639 (60 s)
      Quiet time after excitation: 1171187704

  • NOTE: bay 4 was not excited

2017-02-15

  • 3:16pm, gate valve closed, pump stopped, venting
  308   Thu Feb 16 09:47:29 2017 GabrieleGeneralMeasurementsSummary of coating runs carried out at Montreal
Substrate temperature Serial numbers
room temperature 457 458 490 492
150 C 489 491
250 C 447 456
400 C 459 461
480 C 448 453

 

  309   Thu Feb 16 10:07:59 2017 GabrieleGeneralMeasurementsS1600491

2017-02-16

  • 10:06am, in chamber CR0, balanced
  • 10:07am, roughing pump on
  • 10:31am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1171326606
      Excitation (broad band) at 1171326638 (60 s)
      Quiet time after excitation: 1171326700

    • Quiet time before excitation: 1171328530
      Excitation (broad band) at 1171328562 (60 s)
      Quiet time after excitation: 1171328624

    • Quiet time before excitation: 1171330454
      Excitation (broad band) at 1171330487 (60 s)
      Quiet time after excitation: 1171330549

    • Quiet time before excitation: 1171332379
      Excitation (broad band) at 1171332411 (60 s)
      Quiet time after excitation: 1171332473

    • Quiet time before excitation: 1171334303
      Excitation (broad band) at 1171334335 (60 s)
      Quiet time after excitation: 1171334397

    • Quiet time before excitation: 1171336227
      Excitation (broad band) at 1171336259 (60 s)
      Quiet time after excitation: 1171336321

    • Quiet time before excitation: 1171338151
      Excitation (broad band) at 1171338184 (60 s)
      Quiet time after excitation: 1171338246

    • Quiet time before excitation: 1171340076
      Excitation (broad band) at 1171340108 (60 s)
      Quiet time after excitation: 1171340170

2017-02-17

  • 8:36am pump stopped
  310   Thu Feb 16 10:19:33 2017 GabrieleGeneralMeasurementsS1600453 S1600456 S1600461 S1600490

2017-02-16

  • 10:17am in chamber
    • S1600453 in CR1
    • S1600456 in CR2
    • S1600461 in CR3
    • S1600490 in CR4
  • Notes:
    • added ND03 on path to CR1 and CR3, since QPD were saturating
    • there is something wrong with CR1, the spectrum is very noisy. I checked that there is no clipping of the beam. I also tried to move the spot on the disk, without change. Maybe the disk is touching?
  • 10:18am, roughing pump on, clamps on
  • 10:21am, turbo pump on
  • Excitations: (NOTE: bay 1 noise spectrum is very bad. The autocetering of bay 3 failed, so the QPD was not centered for most of the time)
    • Quiet time before excitation: 1171326574
      Excitation (broad band) at 1171326609 (60 s)
      Quiet time after excitation: 1171326674

    • Quiet time before excitation: 1171328504
      Excitation (broad band) at 1171328539 (60 s)
      Quiet time after excitation: 1171328604

    • Quiet time before excitation: 1171330434
      Excitation (broad band) at 1171330469 (60 s)
      Quiet time after excitation: 1171330534

    • Quiet time before excitation: 1171332364
      Excitation (broad band) at 1171332399 (60 s)
      Quiet time after excitation: 1171332465

    • Quiet time before excitation: 1171334295
      Excitation (broad band) at 1171334330 (60 s)
      Quiet time after excitation: 1171334395

    • Quiet time before excitation: 1171336225
      Excitation (broad band) at 1171336260 (60 s)
      Quiet time after excitation: 1171336325

    • Quiet time before excitation: 1171338155
      Excitation (broad band) at 1171338191 (60 s)
      Quiet time after excitation: 1171338256

    • Quiet time before excitation: 1171340086
      Excitation (broad band) at 1171340121 (60 s)
      Quiet time after excitation: 1171340186

2017-02-17

  • 8:43am gate valve closed, pump stopped, venting slowly
  • the measurements carried out last night didn't look very good, mostly because it seems that the picomotor of QPD3 got crazy and was shaking too much the bench
  • 12:19pm, balanced again, roughing pump on. Added ND03 and ND04 to lasers to avoid QPD saturations
  • 12:49pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1171425425
      Excitation (broad band) at 1171425460 (60 s)
      Quiet time after excitation: 1171425525

    • Quiet time before excitation: 1171427355
      Excitation (broad band) at 1171427390 (60 s)
      Quiet time after excitation: 1171427455

    • Quiet time before excitation: 1171429285
      Excitation (broad band) at 1171429320 (60 s)
      Quiet time after excitation: 1171429385

    • Quiet time before excitation: 1171431215
      Excitation (broad band) at 1171431250 (60 s)
      Quiet time after excitation: 1171431315

    • Quiet time before excitation: 1171433145
      Excitation (broad band) at 1171433180 (60 s)
      Quiet time after excitation: 1171433245

    • Quiet time before excitation: 1171435075
      Excitation (broad band) at 1171435110 (60 s)
      Quiet time after excitation: 1171435176

    • Quiet time before excitation: 1171437006
      Excitation (broad band) at 1171437041 (60 s)
      Quiet time after excitation: 1171437106

    • Quiet time before excitation: 1171438936
      Excitation (broad band) at 1171438971 (60 s)
      Quiet time after excitation: 1171439036

2017-02-18

  • 9:34am, gate valve closed, pumps stopped, venting
  312   Sat Feb 18 15:04:00 2017 GabrieleGeneralMeasurementsS1600481 S1600483 S1600469 S1600471

2017-02-18

  • 9:54am in chamber, balanced
    • S1600469 in CR1
    • S1600471 in CR2
    • S1600481 in CR3
    • S1600483 in CR4
  • 10:00am, roughing pump on, clamps on
  • 10:13am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1171492847
      Excitation (broad band) at 1171492882 (60 s)
      Quiet time after excitation: 1171492947

    • Quiet time before excitation: 1171494777
      Excitation (broad band) at 1171494813 (60 s)
      Quiet time after excitation: 1171494878

    • Quiet time before excitation: 1171496708
      Excitation (broad band) at 1171496743 (60 s)
      Quiet time after excitation: 1171496808

    • Quiet time before excitation: 1171498638
      Excitation (broad band) at 1171498673 (60 s)
      Quiet time after excitation: 1171498738

    • Quiet time before excitation: 1171500568
      Excitation (broad band) at 1171500603 (60 s)
      Quiet time after excitation: 1171500668

    • Quiet time before excitation: 1171502498
      Excitation (broad band) at 1171502533 (60 s)
      Quiet time after excitation: 1171502598

    • Quiet time before excitation: 1171504428
      Excitation (broad band) at 1171504463 (60 s)
      Quiet time after excitation: 1171504528

    • Quiet time before excitation: 1171506358
      Excitation (broad band) at 1171506393 (60 s)
      Quiet time after excitation: 1171506458

  • More excitations:

    • Quiet time before excitation: 1171509354
      Excitation (broad band) at 1171509389 (60 s)
      Quiet time after excitation: 1171509454

    • Quiet time before excitation: 1171511284
      Excitation (broad band) at 1171511319 (60 s)
      Quiet time after excitation: 1171511384

    • Quiet time before excitation: 1171513214
      Excitation (broad band) at 1171513249 (60 s)
      Quiet time after excitation: 1171513314

    • Quiet time before excitation: 1171515144
      Excitation (broad band) at 1171515179 (60 s)
      Quiet time after excitation: 1171515244

    • Quiet time before excitation: 1171517074
      Excitation (broad band) at 1171517109 (60 s)
      Quiet time after excitation: 1171517174

    • Quiet time before excitation: 1171519004
      Excitation (broad band) at 1171519039 (60 s)
      Quiet time after excitation: 1171519104

    • Quiet time before excitation: 1171520934
      Excitation (broad band) at 1171520969 (60 s)
      Quiet time after excitation: 1171521034

    • Quiet time before excitation: 1171522864
      Excitation (broad band) at 1171522899 (60 s)
      Quiet time after excitation: 1171522964

2017-02-19

  • 11:11am, gate valve closed, pumps stopped, venting
     

 

  313   Sun Feb 19 11:46:26 2017 GabrieleGeneralMeasurementsS1600458 S1600474 S1600491

2017-02-19

  • 11:28am an chamber:
    • S1600458 in CR1
    • S1600474 in CR2
    • S1600491 in CR3
    • empty CR4
  • 11:46am roughing pump on, clamps on
  • 11:57am turbo pump on
  • Excitations:
    • Quiet time before excitation: 1171579753
      Excitation (broad band) at 1171579788 (60 s)
      Quiet time after excitation: 1171579854

    • Quiet time before excitation: 1171581684
      Excitation (broad band) at 1171581719 (60 s)
      Quiet time after excitation: 1171581784

    • Quiet time before excitation: 1171583614
      Excitation (broad band) at 1171583649 (60 s)
      Quiet time after excitation: 1171583714

    • Quiet time before excitation: 1171585545
      Excitation (broad band) at 1171585580 (60 s)
      Quiet time after excitation: 1171585645

    • Quiet time before excitation: 1171587475
      Excitation (broad band) at 1171587510 (60 s)
      Quiet time after excitation: 1171587575

    • Quiet time before excitation: 1171589405
      Excitation (broad band) at 1171589440 (60 s)
      Quiet time after excitation: 1171589505

    • Quiet time before excitation: 1171591335
      Excitation (broad band) at 1171591370 (60 s)
      Quiet time after excitation: 1171591435

    • Quiet time before excitation: 1171593265
      Excitation (broad band) at 1171593300 (60 s)
      Quiet time after excitation: 1171593365

2017-02-21

  • 10:30am, gate valve closed, pumps stopped, venting
  315   Wed Feb 22 15:11:59 2017 GabrieleGeneralMeasurementsS1600519 S1600520 S1600521 S1600522

2017-02-22

  • 2:59pm, in chamber, balanced, removed all neutral densities
  • 3:02pm, roughing pump on, clamps on
  • 3:11pm, turbo pump on
  • Excitations
    • Quiet time before excitation: 1171847838
      Excitation broadband: 1171847873
      Quiet time after excitation: 1171847888

    • Quiet time before excitation: 1171858718
      Excitation broadband: 1171858754
      Quiet time after excitation: 1171858769

    • Quiet time before excitation: 1171869599
      Excitation broadband: 1171869634
      Quiet time after excitation: 1171869649

    • Quiet time before excitation: 1171880479
      Excitation broadband: 1171880514
      Quiet time after excitation: 1171880530

 

2017-02-23

  • 10:22am, gate valve closed, pumps off, venting

 

  316   Thu Feb 23 10:54:41 2017 GabrieleGeneralMeasurementsS1600523 S1600524

2017-02-23

  • 10:35am in chamber, balanced
    • S1600523 in bay 1
    • S1600524 in bay 2
  • 10:45am, roughing pump on, clamps on
  • 10:55am, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1171925035
      Excitation broadband: 1171925070
      Quiet time after excitation: 1171925085

    • Quiet time before excitation: 1171935915
      Excitation broadband: 1171935950
      Quiet time after excitation: 1171935965

    • Quiet time before excitation: 1171946795
      Excitation broadband: 1171946830
      Quiet time after excitation: 1171946845

    • Quiet time before excitation: 1171957675
      Excitation broadband: 1171957710
      Quiet time after excitation: 1171957725

2017-02-24

  • 8:40am, gate valve close, pumps off, venting
  317   Fri Feb 24 11:05:58 2017 GabrieleGeneralMeasurementsS1600456 S1600458 S1600461 S1600491

2017-02-24

  • 10:50am, in chamber, balanced, added neutral density to laser on the 1/3 path
    • S1600456 in CR1
    • S1600458 in CR2
    • S1600461 in CR3
    • S1600491 in CR4
  • 10:56am, roughing pump on, clamps on
  • 11:05am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1172009197
      Excitation broadband: 1172009232
      Quiet time after excitation: 1172009297

    • Quiet time before excitation: 1172011127
      Excitation broadband: 1172011162
      Quiet time after excitation: 1172011227

    • Quiet time before excitation: 1172013057
      Excitation broadband: 1172013092
      Quiet time after excitation: 1172013157

    • Quiet time before excitation: 1172014987
      Excitation broadband: 1172015022
      Quiet time after excitation: 1172015087

    • Quiet time before excitation: 1172016917
      Excitation broadband: 1172016952
      Quiet time after excitation: 1172017017

    • Quiet time before excitation: 1172018847
      Excitation broadband: 1172018882
      Quiet time after excitation: 1172018947

    • Quiet time before excitation: 1172020777
      Excitation broadband: 1172020812
      Quiet time after excitation: 1172020877

    • Quiet time before excitation: 1172022707
      Excitation broadband: 1172022742
      Quiet time after excitation: 1172022807

2017-02-27

  • 8:32am venting
  318   Fri Feb 24 13:21:03 2017 GabrieleGeneralMeasurementsQ of substrates with polished edges

Below the measured Q values of the six Suprasil 313 substrates, with polished edges, after annealing at 900 degrees C for 9 hours.

They are all consistently at a level of 100e6 at 1 KHz and showing a similar frequency dependency going down to a about 30e6 at 20-30 kHz. The only exception is S1600522 which has clearly lower Q values at all frequencies.

Below a comparison of the substrate loss angles compared wiht Steve Penn's model:

  320   Mon Feb 27 08:42:05 2017 GabrieleGeneralMeasurementsS1600453 S1600490

2017-02-27

  • 8:40am, in chamber, balanced
    • S1600453 in CR1
    • S1600491 in CR2 (i meant to install 490, but got confused)
  • 10:23am, roughing pump on, clamps on
  • 10:32am, turbo pump on
  • 3:01pm, something is wrong with CR1 (the 666 Hz line due to the turbo pump is very large and saturates the QPD signals). Venting
  • 4:11pm in chamber
    • S1600453 in CR1
    • S1600490 in CR2
  • 4:12pm roughing pump on, clamps on
  • 4:20pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1172290836
      Excitation broadband: 1172290871
      Quiet time after excitation: 1172290936

    • Quiet time before excitation: 1172292766
      Excitation broadband: 1172292801
      Quiet time after excitation: 1172292866

    • Quiet time before excitation: 1172294696
      Excitation broadband: 1172294731
      Quiet time after excitation: 1172294796

    • Quiet time before excitation: 1172296626
      Excitation broadband: 1172296661
      Quiet time after excitation: 1172296726

    • Quiet time before excitation: 1172298556
      Excitation broadband: 1172298591
      Quiet time after excitation: 1172298656

    • Quiet time before excitation: 1172300486
      Excitation broadband: 1172300522
      Quiet time after excitation: 1172300587

    • Quiet time before excitation: 1172302417
      Excitation broadband: 1172302452
      Quiet time after excitation: 1172302518

    • Quiet time before excitation: 1172304348
      Excitation broadband: 1172304383
      Quiet time after excitation: 1172304448

2017-02-28

  • 11:08am, vented
  321   Mon Feb 27 13:13:05 2017 GabrieleGeneralMeasurementsS1600490

2017-02-27

  • 12:59pm, installed in chamber CR0, balanced
  • 1:00pm, roughing pump on
  • 1:13pm, turbo pump on
  • 3:04pm, stopped pumps
  322   Tue Feb 28 11:22:35 2017 GabrieleGeneralMeasurementsS1600463 S1600466 S1600475 S1600476

2017-02-28

  • 11:20am, in chamber
    • S1600463 in CR1
    • S1600466 in CR2
    • S1600475 in CR3
    • S1600476 in CR4
  • 2:10pm, roughing pump on
  • 2:20pm, turbo pump on
  • Excitations
    • Quiet time before excitation: 1172366632
      Excitation broadband: 1172366667
      Quiet time after excitation: 1172366732

    • Quiet time before excitation: 1172373962
      Excitation broadband: 1172373997
      Quiet time after excitation: 1172374062

    • Quiet time before excitation: 1172381292
      Excitation broadband: 1172381327
      Quiet time after excitation: 1172381392

    • Quiet time before excitation: 1172388622
      Excitation broadband: 1172388657
      Quiet time after excitation: 1172388722

2017-03-01

  • 9:31am, venting
  323   Tue Feb 28 14:20:50 2017 GabrieleGeneralMeasurementsNew MIT sample #1

2017-02-28

  • 2:19pm, installed in CR0, balanced, with 1/2" inserts facing down
    • It looks dusty and there is a fingerprint on the edge. I didn't clean it
  • 2:21pm, roughing pump on
  • 2:35pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1172377933
      Excitation broadband: 1172377965
      Quiet time after excitation: 1172378027

    • Quiet time before excitation: 1172381657
      Excitation broadband: 1172381689
      Quiet time after excitation: 1172381751

    • Quiet time before excitation: 1172385381
      Excitation broadband: 1172385414
      Quiet time after excitation: 1172385476

    • Quiet time before excitation: 1172389106
      Excitation broadband: 1172389138
      Quiet time after excitation: 1172389200

    • Quiet time before excitation: 1172392830
      Excitation broadband: 1172392863
      Quiet time after excitation: 1172392925

    • Quiet time before excitation: 1172396555
      Excitation broadband: 1172396587
      Quiet time after excitation: 1172396649

 

2017-03-01

  • 9:36am, pumps stopped

2017-03-02

  • 9:00am. The laser beam was probably hitting one of the glued inserts. Checked that te disk is not touching, moved the ESD a bit lower
  • 9:04am, roughing pump on
  • 9:17am, turbo pump on
  • 1:50pm, pumps off
  324   Wed Mar 1 10:10:47 2017 GabrieleGeneralMeasurementsS1600469 S1600471 S1600481 S1600483

2017-03-01

  • 10:10am, in chamber, added neutral densities
    • S1600469 in CR1
    • S1600471 in CR2
    • S1600481 in CR3
    • S1600483 in CR4
  • 10:12am, roughing pump on, clamps on
  • 10:22am, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1172438462
      Excitation broadband: 1172438497
      Quiet time after excitation: 1172438562

    • Quiet time before excitation: 1172440392
      Excitation broadband: 1172440427
      Quiet time after excitation: 1172440492

    • Quiet time before excitation: 1172442322
      Excitation broadband: 1172442357
      Quiet time after excitation: 1172442422

    • Quiet time before excitation: 1172444252
      Excitation broadband: 1172444287
      Quiet time after excitation: 1172444352

    • Quiet time before excitation: 1172446182
      Excitation broadband: 1172446217
      Quiet time after excitation: 1172446282

    • Quiet time before excitation: 1172448112
      Excitation broadband: 1172448148
      Quiet time after excitation: 1172448213

    • Quiet time before excitation: 1172450044
      Excitation broadband: 1172450079
      Quiet time after excitation: 1172450144

    • Quiet time before excitation: 1172451974
      Excitation broadband: 1172452009
      Quiet time after excitation: 1172452074

2017-03-02

  • 9:00am, vented, samples removed
  325   Thu Mar 2 09:45:58 2017 GabrieleGeneralMeasurementsS1600456 S1600458 S1600461 S1600491

2017-03-02

  • 9:31am, in chamber, removed ND from path 2-4
    • S1600456 in CR1
    • S1600458 in CR2
    • S1600461 in CR3
    • S1600491 in CR4
  • 9:45am roughing pump on
  • 9:55am turbo pump on
  • Excitations
    • Quiet time before excitation: 1172530103
      Excitation broadband: 1172530139
      Quiet time after excitation: 1172530204

    • Quiet time before excitation: 1172532034
      Excitation broadband: 1172532069
      Quiet time after excitation: 1172532134

    • Quiet time before excitation: 1172533964
      Excitation broadband: 1172533999
      Quiet time after excitation: 1172534064

    • Quiet time before excitation: 1172535894
      Excitation broadband: 1172535929
      Quiet time after excitation: 1172535994

    • Quiet time before excitation: 1172537824
      Excitation broadband: 1172537859
      Quiet time after excitation: 1172537924

    • Quiet time before excitation: 1172539754
      Excitation broadband: 1172539789
      Quiet time after excitation: 1172539854

    • Quiet time before excitation: 1172541684
      Excitation broadband: 1172541719
      Quiet time after excitation: 1172541784

    • Quiet time before excitation: 1172543614
      Excitation broadband: 1172543649
      Quiet time after excitation: 1172543714

2017-03-03

  • 9:30am, gate valve closed, pumps stopped, venting
  327   Fri Mar 3 13:00:50 2017 GabrieleGeneralMeasurementsS1600453 S1600490

2017-03-03

  • 12:45pm, in chamber
    • S1600453 in CR3
    • S1600490 in CR4
  • 12:45pm roughing pump on
  • 12:56pm, turbo pump on
  • Excitation
    • Quiet time before excitation: 1172620986
      Excitation broadband: 1172621021
      Quiet time after excitation: 1172621086

    • Quiet time before excitation: 1172622916
      Excitation broadband: 1172622951
      Quiet time after excitation: 1172623016

    • Quiet time before excitation: 1172624846
      Excitation broadband: 1172624881
      Quiet time after excitation: 1172624946

    • Quiet time before excitation: 1172626776
      Excitation broadband: 1172626811
      Quiet time after excitation: 1172626876

    • Quiet time before excitation: 1172628706
      Excitation broadband: 1172628742
      Quiet time after excitation: 1172628807

    • Quiet time before excitation: 1172630638
      Excitation broadband: 1172630673
      Quiet time after excitation: 1172630738

    • Quiet time before excitation: 1172632568
      Excitation broadband: 1172632603
      Quiet time after excitation: 1172632668

    • Quiet time before excitation: 1172634498
      Excitation broadband: 1172634534
      Quiet time after excitation: 1172634599

2017-03-06

  • 10:19am, gate valve closed, pumps off
  328   Fri Mar 3 13:01:59 2017 GabrieleGeneralMeasurementsNew MIT sample #2

2017-03-03

  • 1:00pm, in chamber, realigned optical lever to get as close as possible to the edge of the disk
  • 1:02pm, roughing pump on
  • 1:14pm, turbo pump on
  • Excite
    • Quiet time before excitation: 1172633160
      Excitation broadband: 1172633192
      Quiet time after excitation: 1172633224

    • Quiet time before excitation: 1172634454
      Excitation broadband: 1172634486
      Quiet time after excitation: 1172634518

    • Quiet time before excitation: 1172635748
      Excitation broadband: 1172635781
      Quiet time after excitation: 1172635813

    • Quiet time before excitation: 1172637043
      Excitation broadband: 1172637075
      Quiet time after excitation: 1172637107

    • Quiet time before excitation: 1172638337
      Excitation broadband: 1172638369
      Quiet time after excitation: 1172638401

    • Quiet time before excitation: 1172639631
      Excitation broadband: 1172639663
      Quiet time after excitation: 1172639695

2017-03-06

  • 10:18am, pumps off

 

  329   Tue Mar 7 11:01:58 2017 GabrieleGeneralMeasurementsS1600469 S1600471 S1600481 S1600483

2017-03-07

  • 10:57am, in chamber
    • S1600469 in CR1
    • S1600471 in CR2
    • S1600481 in CR3
    • S1600483 in CR4
  • 11:02am, roughing pump on
  • 11:11am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1172968827
      Excitation broadband: 1172968862
      Quiet time after excitation: 1172968927

    • Quiet time before excitation: 1172970757
      Excitation broadband: 1172970792
      Quiet time after excitation: 1172970857

    • Quiet time before excitation: 1172972687
      Excitation broadband: 1172972723
      Quiet time after excitation: 1172972788

    • Quiet time before excitation: 1172974618
      Excitation broadband: 1172974653
      Quiet time after excitation: 1172974718

    • Quiet time before excitation: 1172976548
      Excitation broadband: 1172976583
      Quiet time after excitation: 1172976648

    • Quiet time before excitation: 1172978478
      Excitation broadband: 1172978513
      Quiet time after excitation: 1172978578

    • Quiet time before excitation: 1172980408
      Excitation broadband: 1172980443
      Quiet time after excitation: 1172980508

    • Quiet time before excitation: 1172982338
      Excitation broadband: 1172982373
      Quiet time after excitation: 1172982438

2017-03-08

  • 8:00am pumps off, gate valve closed
  330   Tue Mar 7 11:09:33 2017 GabrieleGeneralMeasurementsNew MIT sample #3

2017-03-07

  • 11:08am, in chamber CR0
  • 11:09am, roughing pump on
  • 11:23am turbo pump on
  • 3:37pm, pumps stopped, the turbo is saturating CR1

2017-03-08

  • 8:00am pumps restarted
  • Excitations
    • Quiet time before excitation: 1173048953
      Excitation broadband: 1173048986
      Quiet time after excitation: 1173049018

    • Quiet time before excitation: 1173050248
      Excitation broadband: 1173050280
      Quiet time after excitation: 1173050312

    • Quiet time before excitation: 1173051542
      Excitation broadband: 1173051574
      Quiet time after excitation: 1173051606

    • Quiet time before excitation: 1173052836
      Excitation broadband: 1173052868
      Quiet time after excitation: 1173052900

    • Quiet time before excitation: 1173054130
      Excitation broadband: 1173054163
      Quiet time after excitation: 1173054195

    • Quiet time before excitation: 1173055425
      Excitation broadband: 1173055457
      Quiet time after excitation: 1173055489

2017-03-09

  • 10:10am, pumps off
  332   Sat Mar 11 17:33:45 2017 GabrieleGeneralMeasurementsS1600490

2017-03-10

  • 4:38pm, in chamber
  • 4:40pm, roughing pump on
  • 4:59pm, turbo pump on

2017-03-22

  • 12:10am pumps off
  333   Wed Mar 22 12:47:40 2017 GabrieleGeneralMeasurementsS1600469 S1600471 S1600481 S1600483

2017-03-22

  • 12:38am, in chamber
    • S1600469 in CR1
    • S1600471 in CR2
    • S1600481 in CR3
    • S1600483 in CR4
  • 12:40 roughing pump on
  • 12:47 turbo pump on
  • Excitations
    • Quiet time before excitation: 1174263313
      Excitation broadband: 1174263348
      Quiet time after excitation: 1174263413

    • Quiet time before excitation: 1174265243
      Excitation broadband: 1174265278
      Quiet time after excitation: 1174265343

    • Quiet time before excitation: 1174267173
      Excitation broadband: 1174267208
      Quiet time after excitation: 1174267273

    • Quiet time before excitation: 1174269103
      Excitation broadband: 1174269138
      Quiet time after excitation: 1174269203

    • Quiet time before excitation: 1174271033
      Excitation broadband: 1174271068
      Quiet time after excitation: 1174271133

    • Quiet time before excitation: 1174272963
      Excitation broadband: 1174272998
      Quiet time after excitation: 1174273063

    • Quiet time before excitation: 1174274893
      Excitation broadband: 1174274928
      Quiet time after excitation: 1174274993

    • Quiet time before excitation: 1174276823
      Excitation broadband: 1174276859
      Quiet time after excitation: 1174276924

 

2017-03-29

  • 11:40am removed from chamber

 

  334   Wed Mar 29 11:57:09 2017 GabrieleGeneralMeasurementsMIT sample

2017-03-29

  • 11:47am, in chamber CR0, balanced
  • 11:48am roughing pump on
  • 12:00pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1174976553
      Excitation broadband: 1174976585
      Quiet time after excitation: 1174976607

    • Quiet time before excitation: 1174977837
      Excitation broadband: 1174977869
      Quiet time after excitation: 1174977891

    • Quiet time before excitation: 1174979121
      Excitation broadband: 1174979153
      Quiet time after excitation: 1174979175

    • Quiet time before excitation: 1174980405
      Excitation broadband: 1174980437
      Quiet time after excitation: 1174980459

    • Quiet time before excitation: 1174981689
      Excitation broadband: 1174981721
      Quiet time after excitation: 1174981743

    • Quiet time before excitation: 1174982973
      Excitation broadband: 1174983006
      Quiet time after excitation: 1174983028

    • Quiet time before excitation: 1174984258
      Excitation broadband: 1174984291
      Quiet time after excitation: 1174984313

    • Quiet time before excitation: 1174985543
      Excitation broadband: 1174985575
      Quiet time after excitation: 1174985597

  335   Thu Mar 30 13:33:13 2017 GabrieleGeneralMeasurementsS1600477

2017-03-30

  • 1:23pm, in chamber CR2
  • 1:25pm, roughing pump started, clamps on
  • 1:34pm turbo pump on
  • Excitations:
    • Quiet time before excitation: 1174958541
      Excitation broadband: 1174958576
      Quiet time after excitation: 1174958641

    • Quiet time before excitation: 1174960471
      Excitation broadband: 1174960506
      Quiet time after excitation: 1174960571

    • Quiet time before excitation: 1174962401
      Excitation broadband: 1174962436
      Quiet time after excitation: 1174962501

    • Quiet time before excitation: 1174964331
      Excitation broadband: 1174964366
      Quiet time after excitation: 1174964431

    • Quiet time before excitation: 1174966261
      Excitation broadband: 1174966296
      Quiet time after excitation: 1174966361

    • Quiet time before excitation: 1174968191
      Excitation broadband: 1174968226
      Quiet time after excitation: 1174968291

    • Quiet time before excitation: 1174970122
      Excitation broadband: 1174970157
      Quiet time after excitation: 1174970222

    • Quiet time before excitation: 1174972053
      Excitation broadband: 1174972088
      Quiet time after excitation: 1174972153

  339   Mon Apr 10 16:22:12 2017 GabrieleGeneralMeasurementsS1600529 S1600530 S1600531 S1600532

2017-04-10

  • 4:10pm, in chamber:
    • S1600529 in CR1
    • S1600530 in CR2
    • S1600531 in CR3
    • S1600532 in CR4
  • 4:14pm, roughing pump on
  • 4:24pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1175916121
      Excitation broadband: 1175916156
      Quiet time after excitation: 1175916221

    • Quiet time before excitation: 1175921651
      Excitation broadband: 1175921686
      Quiet time after excitation: 1175921751

    • Quiet time before excitation: 1175927181
      Excitation broadband: 1175927216
      Quiet time after excitation: 1175927281

    • Quiet time before excitation: 1175932711
      Excitation broadband: 1175932746
      Quiet time after excitation: 1175932811

    • Quiet time before excitation: 1175938241
      Excitation broadband: 1175938276
      Quiet time after excitation: 1175938341

    • Quiet time before excitation: 1175943771
      Excitation broadband: 1175943806
      Quiet time after excitation: 1175943871

    • Quiet time before excitation: 1175949301
      Excitation broadband: 1175949336
      Quiet time after excitation: 1175949401

    • Quiet time before excitation: 1175954831
      Excitation broadband: 1175954866
      Quiet time after excitation: 1175954931

 

2017-04-11

  • 11:09 valve closed, pumps stopped

 

  340   Tue Apr 11 14:07:48 2017 GabrieleGeneralMeasurementsS1600533 S1600535 S1600536 S1600537

2017-04-11

  • 2:02pm, in chamber
    • S1600533 in CR1
    • S1600535 in CR2
    • S1600536 is CR3
    • S1600537 in CR4
  • 2:05pm roughing pump on
  • 2:15pm, turbo pump on
  • Excitations:
    • Quiet time before excitation: 1175994832
      Excitation broadband: 1175994867
      Quiet time after excitation: 1175994932

    • Quiet time before excitation: 1176000362
      Excitation broadband: 1176000397
      Quiet time after excitation: 1176000462

    • Quiet time before excitation: 1176005892
      Excitation broadband: 1176005928
      Quiet time after excitation: 1176005992

    • Quiet time before excitation: 1176011422
      Excitation broadband: 1176011457
      Quiet time after excitation: 1176011522

    • Quiet time before excitation: 1176016953
      Excitation broadband: 1176016988
      Quiet time after excitation: 1176017053

    • Quiet time before excitation: 1176022483
      Excitation broadband: 1176022518
      Quiet time after excitation: 1176022583

    • Quiet time before excitation: 1176028013
      Excitation broadband: 1176028048
      Quiet time after excitation: 1176028113

    • Quiet time before excitation: 1176033543
      Excitation broadband: 1176033578
      Quiet time after excitation: 1176033643

2017-04-14

  • 12:58pm, valve closed, pumps off
  341   Fri Apr 14 13:49:17 2017 GabrieleGeneralMeasurementsS1600538 S1600539 S1600540 S1600541

2017-04-14

  • 1:45pm in chamber
    • S1600538 in CR1
    • S1600539 in CR2
    • S1600540 in CR3
    • S1600541 in CR4
  • 1:48pm roughing pump on
  • 2:00pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1176267253
      Excitation broadband: 1176267289
      Quiet time after excitation: 1176267354

    • Quiet time before excitation: 1176281784
      Excitation broadband: 1176281819
      Quiet time after excitation: 1176281884

    • Quiet time before excitation: 1176296314
      Excitation broadband: 1176296349
      Quiet time after excitation: 1176296414

    • Quiet time before excitation: 1176310844
      Excitation broadband: 1176310879
      Quiet time after excitation: 1176310944

    • Quiet time before excitation: 1176325374
      Excitation broadband: 1176325409
      Quiet time after excitation: 1176325474

    • Quiet time before excitation: 1176339904
      Excitation broadband: 1176339939
      Quiet time after excitation: 1176340004

    • Quiet time before excitation: 1176354434
      Excitation broadband: 1176354469
      Quiet time after excitation: 1176354534

    • Quiet time before excitation: 1176368964
      Excitation broadband: 1176368999
      Quiet time after excitation: 1176369064

 

2017-04-20

  • 8:58am valve closed, venting, pumps stopped

 

  342   Thu Apr 20 09:10:25 2017 GabrieleGeneralMeasurementsS1600542 S1600543 S1600544 S1600545

2017-04-20

  • 9:09am in chamber
    • S1600542 in CR1
    • S1600543 in CR2
    • S1600544 in CR3
    • S1600545 in CR4
  • 10:50am, roughing pump on
  • 11:00am turbo pump on
  • Excitations:
    • Quiet time before excitation: 1176767876
      Excitation broadband: 1176767911
      Quiet time after excitation: 1176767976

    • Quiet time before excitation: 1176773406
      Excitation broadband: 1176773441
      Quiet time after excitation: 1176773506

    • Quiet time before excitation: 1176778936
      Excitation broadband: 1176778971
      Quiet time after excitation: 1176779036

    • Quiet time before excitation: 1176784466
      Excitation broadband: 1176784501
      Quiet time after excitation: 1176784566

    • Quiet time before excitation: 1176789996
      Excitation broadband: 1176790031
      Quiet time after excitation: 1176790096

    • Quiet time before excitation: 1176795526
      Excitation broadband: 1176795561
      Quiet time after excitation: 1176795626

    • Quiet time before excitation: 1176801056
      Excitation broadband: 1176801091
      Quiet time after excitation: 1176801156

    • Quiet time before excitation: 1176806586
      Excitation broadband: 1176806621
      Quiet time after excitation: 1176806686

 

2017-05-13

  • Excitations:
    • Quiet time before excitation: 1178680521
      Excitation broadband: 1178680556
      Quiet time after excitation: 1178680621

    • Quiet time before excitation: 1178691451
      Excitation broadband: 1178691486
      Quiet time after excitation: 1178691551

    • Quiet time before excitation: 1178702381
      Excitation broadband: 1178702416
      Quiet time after excitation: 1178702481

    • Quiet time before excitation: 1178713311
      Excitation broadband: 1178713346
      Quiet time after excitation: 1178713411

    • Quiet time before excitation: 1178724241
      Excitation broadband: 1178724276
      Quiet time after excitation: 1178724341

    • Quiet time before excitation: 1178735171
      Excitation broadband: 1178735206
      Quiet time after excitation: 1178735271

    • Quiet time before excitation: 1178746101
      Excitation broadband: 1178746136
      Quiet time after excitation: 1178746201

    • Quiet time before excitation: 1178757031
      Excitation broadband: 1178757066
      Quiet time after excitation: 1178757131

 

 

  343   Mon May 15 13:19:12 2017 GabrieleGeneralMeasurementsQ measured again after four weeks in vacuum

I measured again two of the substrates that have been sitting in the pumped-down vacuum chamber for about four weeks. The pressure now is below 1e-7 Torr. There is no significant difference between the two sets of measured Q values.

  345   Fri Jun 2 16:04:12 2017 GabrieleGeneralMeasurementsS1600525 S1600526

2017-06-02

  • 3:55pm in chamber:
    • S1600525 in CR1
    • S1600526 in CR3
  • 3:56pm roughing pump on
  • 4:04pm turbo pump on
  • Excitations:
    • Quiet time before excitation: 1180561453
      Excitation broadband: 1180561488
      Quiet time after excitation: 1180561553

    • Quiet time before excitation: 1180572383
      Excitation broadband: 1180572418
      Quiet time after excitation: 1180572483

    • Quiet time before excitation: 1180583313
      Excitation broadband: 1180583348
      Quiet time after excitation: 1180583413

    • Quiet time before excitation: 1180594243
      Excitation broadband: 1180594278
      Quiet time after excitation: 1180594343

    • Quiet time before excitation: 1180605173
      Excitation broadband: 1180605208
      Quiet time after excitation: 1180605273

    • Quiet time before excitation: 1180616103
      Excitation broadband: 1180616138
      Quiet time after excitation: 1180616203

    • Quiet time before excitation: 1180627033
      Excitation broadband: 1180627068
      Quiet time after excitation: 1180627133

    • Quiet time before excitation: 1180637963
      Excitation broadband: 1180637998
      Quiet time after excitation: 1180638063

2017-06-06

  • 8:10am, pumps stopped, valve closed, chamber vented

2017-06-08

  • 3:50pm, in chamber
    • S1600525 in CR1
    • S1600526 in CR3
  • 3:50pm roughing pump on
  • 4:00pm turbo pump on
  • Excitations:
    • Quiet time before excitation: 1181012200
      Excitation broadband: 1181012235
      Quiet time after excitation: 1181012300

    • Quiet time before excitation: 1181023130
      Excitation broadband: 1181023165
      Quiet time after excitation: 1181023230

    • Quiet time before excitation: 1181034060
      Excitation broadband: 1181034095
      Quiet time after excitation: 1181034160

    • Quiet time before excitation: 1181044990
      Excitation broadband: 1181045025
      Quiet time after excitation: 1181045090

  • More excitations

    • Quiet time before excitation: 1181488352
      Excitation broadband: 1181488388
      Quiet time after excitation: 1181488453

    • Quiet time before excitation: 1181499283
      Excitation broadband: 1181499318
      Quiet time after excitation: 1181499384

    • Quiet time before excitation: 1181510214
      Excitation broadband: 1181510249
      Quiet time after excitation: 1181510314

 

2017-06-14

  • 4:40pm, pumps stopped, valve closed, vented

 

  346   Wed Jun 14 16:53:54 2017 GabrieleGeneralMeasurementsS1600546

2017-06-14

  • 4:44pm in chamber
    • S1600546 in CR1
  • 4:47pm roughing pump on
  • 4:55pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1181533731
      Excitation broadband: 1181533766
      Quiet time after excitation: 1181533831

    • Quiet time before excitation: 1181544661
      Excitation broadband: 1181544696
      Quiet time after excitation: 1181544761

    • Quiet time before excitation: 1181555591
      Excitation broadband: 1181555626
      Quiet time after excitation: 1181555691

 

2017-06-15

  • 11:09am venting

 

  347   Thu Jun 15 11:20:13 2017 GabrieleGeneralMeasurementsS1600539 S1600540

2017-06-15

  • 11:13am in chamber
    • S1600539 in CR1
    • S1600540 in CR3
  • 11:14am roughing pump on
  • 11:23am turbo pump on
  • Excitations
    • Quiet time before excitation: 1181596817
      Excitation broadband: 1181596852
      Quiet time after excitation: 1181596917

    • Quiet time before excitation: 1181607747
      Excitation broadband: 1181607782
      Quiet time after excitation: 1181607847

    • Quiet time before excitation: 1181618677
      Excitation broadband: 1181618712
      Quiet time after excitation: 1181618777

2017-06-16

  • 3:17pm venting
  348   Fri Jun 16 15:56:55 2017 GabrieleGeneralMeasurementsS1600541 S1600542

2017-06-16

  • 3:25pm in chamber
    • S1600541 in CR1
    • S1600542 in CR3
  • 3:45pm, roughing pump on
  • 3:55pm turbo pump on
  • Exitations:
    • Quiet time before excitation: 1181706587
      Excitation broadband: 1181706622
      Quiet time after excitation: 1181706687

    • Quiet time before excitation: 1181717517
      Excitation broadband: 1181717552
      Quiet time after excitation: 1181717617

    • Quiet time before excitation: 1181728447
      Excitation broadband: 1181728482
      Quiet time after excitation: 1181728547

    • Quiet time before excitation: 1181739377
      Excitation broadband: 1181739412
      Quiet time after excitation: 1181739477

    • Quiet time before excitation: 1181750307
      Excitation broadband: 1181750343
      Quiet time after excitation: 1181750408

    • Quiet time before excitation: 1181761238
      Excitation broadband: 1181761273
      Quiet time after excitation: 1181761338

    • Quiet time before excitation: 1181772168
      Excitation broadband: 1181772203
      Quiet time after excitation: 1181772268

    • Quiet time before excitation: 1181783098
      Excitation broadband: 1181783133
      Quiet time after excitation: 1181783198

  • The turbo pump switched off, so the pressure was about 3e-2 Torr, all measurements are bad..

2017-06-19

  • 8:48am, turbo pump on again
  • Excitations:
    • Quiet time before excitation: 1181929822
      Excitation broadband: 1181929857
      Quiet time after excitation: 1181929922

    • Quiet time before excitation: 1181937152
      Excitation broadband: 118193718
      Quiet time after excitation: 1181937252

  • 2:28pm, valve closed, pumps off

2017-06-20

  • 1:45pm vented


 

  349   Tue Jun 20 16:01:27 2017 Gabriele, Zach, AlastairGeneralMeasurementsS1600541 S1600542 (laser polished)

2017-06-20

  • The two substrates were laser polished (CO2 power ~ 23 W)
  • 3:50pm installed in chamber
    • S1600541 in CR1
    • S1600542 in CR3
  • 3:52pm roughing pump on
  • 4:00pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1182045787
      Excitation broadband: 1182045822
      Quiet time after excitation: 1182045887

    • Quiet time before excitation: 1182056717
      Excitation broadband: 1182056752
      Quiet time after excitation: 1182056817

    • Quiet time before excitation: 1182067648
      Excitation broadband: 1182067683
      Quiet time after excitation: 1182067748

    • Quiet time before excitation: 1182078578
      Excitation broadband: 1182078613
      Quiet time after excitation: 1182078678

    • Quiet time before excitation: 1182089509
      Excitation broadband: 1182089544
      Quiet time after excitation: 1182089609

 

2017-06-21

  • 1:56pm, valve closed, pumps off

 

  354   Sat Jun 24 12:59:27 2017 GabrieleGeneralMeasurementsS1600541 S1600542 post annealing

2017-06-24

  • 12:47pm in chamber
    • S1600541 in CR1
    • S1600542 in CR3
  • 12:50pm roughing pump on
  • 12:59pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1182524202
      Excitation broadband: 1182524237
      Quiet time after excitation: 1182524262

    • Quiet time before excitation: 1182535092
      Excitation broadband: 1182535127
      Quiet time after excitation: 1182535152

    • Quiet time before excitation: 1182545982
      Excitation broadband: 1182546017
      Quiet time after excitation: 1182546042

    • Quiet time before excitation: 1182556872
      Excitation broadband: 1182556907
      Quiet time after excitation: 1182556932

    • Quiet time before excitation: 1182567762
      Excitation broadband: 1182567797
      Quiet time after excitation: 1182567822

    • Quiet time before excitation: 1182578652
      Excitation broadband: 1182578687
      Quiet time after excitation: 1182578712

    • Quiet time before excitation: 1182589542
      Excitation broadband: 1182589577
      Quiet time after excitation: 1182589602

    • Quiet time before excitation: 1182600432
      Excitation broadband: 1182600467
      Quiet time after excitation: 1182600492

2017-06-28

  • 3:36pm, valve closed, vented, pumps stopped
  357   Wed Jun 28 15:50:15 2017 GabrieleGeneralMeasurementsS1600541

2017-06-28

We plan to leave S1600541 in vacuum for a long period, and measure the Q's periodically.

  • 3:48pm, S1600541 installed in CR0
  • 3:50pm, roughing pump on
  • 4:35pm turbo pump on
  362   Wed Jul 5 10:01:29 2017 GabrieleGeneralMeasurementsS1600547 S1600548 S1600549 S1600550

2017-07-05

  • NOTE: at 9:40am switched off turbo pump in CR0 to avoid  vibrations
  • NOTE: boxes are labeled as S1600546/547/548/549 but must be relabeled as S1600547/548/549/550
  • 9:53am, in chamber
    • S1600547 in CR1
    • S1600548 in CR2
    • S1600549 in CR3
    • S1600550 in CR4
  • 9:54am roughing pump on
  • 10:02am turbo pump on
  • Excitations:
    • Quiet time before excitation: 1183323620
      Excitation broadband: 1183323655
      Quiet time after excitation: 1183323680

    • Quiet time before excitation: 1183330910
      Excitation broadband: 1183330945
      Quiet time after excitation: 1183330970

    • Quiet time before excitation: 1183338200
      Excitation broadband: 1183338235
      Quiet time after excitation: 1183338260

    • Quiet time before excitation: 1183345490
      Excitation broadband: 1183345525
      Quiet time after excitation: 1183345550

    • Quiet time before excitation: 1183352780
      Excitation broadband: 1183352815
      Quiet time after excitation: 1183352840

    • Quiet time before excitation: 1183360070
      Excitation broadband: 1183360105
      Quiet time after excitation: 1183360130

    • Quiet time before excitation: 1183367360
      Excitation broadband: 1183367395
      Quiet time after excitation: 1183367420

    • Quiet time before excitation: 1183374650
      Excitation broadband: 1183374685
      Quiet time after excitation: 1183374710

2017-07-06

  • 3:45pm, valve closed, vented, pumps stopped
  369   Tue Jul 18 09:13:08 2017 GabrieleGeneralMeasurementsShear and bulk losses in tantala

S1600525 has been coated in Fort Collins with 480nm of pure tantala. I used the emasured loss angles (after deposition, before annealing) to estimate the shear and bulk loss angles.

Model

First, my COMSOL simulation shows that even if I don’t include the drum-like modes, I still have a significant scatter of shear/bulk energy ratio. The top panel shows indeed the ratio shear/bulk for all the modes I can measure, and the variation is quite large. So, contrary to my expectation, there is some room for fitting here. The bottom panel just shows the usual dilution factors.

Then I tried to fit the total losses in my sample (the substrate is negligible) using four different models:
1) one single loss angle for both bulk and shear, constant in frequency
2) one single loss angle for both bulk and shear, linear in frequency
3) separate bulk and shear loss angles, constant
4) separate bulk and shear loss angels, linear in frequency 
 
Instead of using Gregg harry's technique (taking pairs of losses together), I simply fit the whole datasets with the assumptions above. I derived the 95% confidence intervals for all parameters. I also weighed each data point with the experimental uncertainty. I’m not sure yet how to compare the performance of the various models and decide which is the best one, since clearly the more parameters I plug into the model, the better the fit gets.
 
If I use two different loss angles, but constant, I get numbers similar to what Gregg presented at the last Amaldi conference (G1701225), but inverted in bulk and shear. I cross checked that I didn’t do any mistake. Instead, if I allow linear dependency on frequency of bulk and shear, I get a trend similar to the one in Gregg's slides.
 
My plan is to have this sample annealed today or tomorrow and measure it again before the end of the week. 
 

Results

One loss angle - constant

\phi = (6.99 \pm 0.05) \times 10^{-4} \mbox{ rad}

One loss angle - linear in frequency

\phi = (6.91 \pm 0.07) \times 10^{-4} +\frac{f-1 \mbox{ kHz}}{1 \mbox{ kHz}} \cdot (3.3 \pm 2.2) \times 10^{-6} \mbox{ rad}

Bulk and shear - constant

\begin{matrix} \phi_{shear} = (6.79 \pm 0.12) \times 10^{-4} \mbox{ rad} \\ \phi_{bulk} = (8.54 \pm 0.98) \times 10^{-4} \mbox{ rad} \end{matrix}

Bulk and shear - linear in frequency

\begin{matrix} \phi_{shear} = (6.9 \pm 0.4) \times 10^{-4} +\frac{f-1 \mbox{ kHz}}{1 \mbox{ kHz}} \cdot (9.9 \pm 7.4) \times 10^{-6} \mbox{ rad} \\ \phi_{bulk} = (6.4 \pm 3.7) \times 10^{-4} +\frac{f-1 \mbox{ kHz}}{1 \mbox{ kHz}} \cdot (-14 \pm 39) \times 10^{-6} \mbox{ rad} \end{matrix}

  370   Wed Jul 19 21:19:14 2017 GabrieleGeneralMeasurementsShear and bulk losses in tantala

To quantify which of the fit below is the most significant, I did a Bayesian analysis (thanks Rory for the help!).

In brief, I compute the Bayes factors for each of the models considered below. As always in any Bayesian analysis, I had to assume some prior distribution for the fit parameters. I used uniform distributions, between 0 and 20e-4 for the loss angles, and between -100e-6 and 100e-6 for the slope. I checked that the intervals I choose for the priors have only a small influence on the results.

The model that has the highest probability is the one that considers different bulk and shear frequency depent loss angles. The others have the following relative probabilities

One loss angle constant:                       1/13e+13
One loss angle linear in frequency:      1/5.5
Bulk/shear angles constant:                  1/48784
Bulk/shear angles linear in frequency: 1/1

So the constant loss angle models are excluded with large significance. The single frequency dependent loss angle is less probable that the bulk/shear frequency dependent model, but only by a factor of 5.5. According to the literature, this is considered a substantial evidence in favor of frequency dependent bulk/shear loss angles.

Quote:

Results

One loss angle - constant

\phi = (6.99 \pm 0.05) \times 10^{-4} \mbox{ rad}

One loss angle - linear in frequency

\phi = (6.91 \pm 0.07) \times 10^{-4} +\frac{f-1 \mbox{ kHz}}{1 \mbox{ kHz}} \cdot (3.3 \pm 2.2) \times 10^{-6} \mbox{ rad}

Bulk and shear - constant

\begin{matrix} \phi_{shear} = (6.79 \pm 0.12) \times 10^{-4} \mbox{ rad} \\ \phi_{bulk} = (8.54 \pm 0.98) \times 10^{-4} \mbox{ rad} \end{matrix}

Bulk and shear - linear in frequency

\begin{matrix} \phi_{shear} = (6.9 \pm 0.4) \times 10^{-4} +\frac{f-1 \mbox{ kHz}}{1 \mbox{ kHz}} \cdot (9.9 \pm 7.4) \times 10^{-6} \mbox{ rad} \\ \phi_{bulk} = (6.4 \pm 3.7) \times 10^{-4} +\frac{f-1 \mbox{ kHz}}{1 \mbox{ kHz}} \cdot (-14 \pm 39) \times 10^{-6} \mbox{ rad} \end{matrix}

 

  372   Fri Jul 21 08:42:09 2017 GabrieleGeneralMeasurementsS1600525

2017-07-21

  • 8:30am, in chamber (CR4)
  • 8:32am, roughing pump on
  • 8:41am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1184697303
      Excitation broadband: 1184697338
      Quiet time after excitation: 1184697363

    • Quiet time before excitation: 1184698593
      Excitation broadband: 1184698628
      Quiet time after excitation: 1184698653

    • Quiet time before excitation: 1184699883
      Excitation broadband: 1184699918
      Quiet time after excitation: 1184699943

    • Quiet time before excitation: 1184701173
      Excitation broadband: 1184701208
      Quiet time after excitation: 1184701233

    • Quiet time before excitation: 1184702463
      Excitation broadband: 1184702499
      Quiet time after excitation: 1184702524

    • Quiet time before excitation: 1184703754
      Excitation broadband: 1184703789
      Quiet time after excitation: 1184703814

    • Quiet time before excitation: 1184705044
      Excitation broadband: 1184705079
      Quiet time after excitation: 1184705104

    • Quiet time before excitation: 1184706334
      Excitation broadband: 1184706369
      Quiet time after excitation: 1184706394
       

2017-07-22

  • 12:13pm, valve closed, pumps off
  373   Fri Jul 21 14:55:02 2017 GabrieleGeneralMeasurementsShear and bulk losses in annealed tantala

I repeated the analysis for bulk and shear losses described in an early elog entry, with the same coating, but after annealing at 500C for 9 hours. 

The COMSOL model is the same as before, so the dilution factors are the same, except that this time I could measure a few more modes at high frequency:

As in the previous analysis, I fitted four different models:
1) one single loss angle for both bulk and shear, constant in frequency
2) one single loss angle for both bulk and shear, linear in frequency
3) separate bulk and shear loss angles, constant
4) separate bulk and shear loss angles, linear in frequency 

The data strongly favor the last model: two loss angles for shear and bulk, linearly dependent on frequency (Bayes factor -22.7 for the second best model, which is the frequency dependent single loss angle).

The results are below. 

Single constant loss angle

\phi = (3.95 \pm 0.08) \times 10^{-4} \mbox{ rad}

Single loss angle, linearly dependent on frequency

\phi = (3.69 \pm 0.17) \times 10^{-4} + \frac{f-1 kHz}{1 kHz} (4.6 \pm 0.3)\times 10^{-6} \mbox{ rad}

Bulk and shear loss angles, constant

\begin{array}{l} \phi_{shear} = (3.4 \pm 0.5) \times 10^{-4} \mbox{ rad} \\ \phi_{bulk} = (7.3 \pm 3.3) \times 10^{-4} \mbox{ rad} \\ \end{array}

Bulk and shear loss angles, linearly dependent on frequency

\begin{array}{l} \phi_{shear} = (3.58 \pm 0.15) \times 10^{-4} + \frac{f - 1 kHz}{1 kHz} (6.1 \pm 2.4) \times 10^{-6} \mbox{ rad} \\ \phi_{bulk} = (4.5 \pm 1.2) \times 10^{-4} + \frac{f - 1 kHz}{1 kHz} (-7 \pm 16) \times 10^{-6} \mbox{ rad} \\ \end{array}

 

  374   Sat Jul 22 13:05:46 2017 GabrieleGeneralMeasurementsS1600533 S1600535 S1600536 S1600547

2017-07-22

  • 12:55pm in chamber
    • S1600533 in CR1
    • S1600535 in CR2
    • S1600536 in CR3
    • S1600547 in CR4
  • Added neutral densities
  • 12:57pm roughing pump on
  • 1:05pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1184803575
      Excitation broadband: 1184803611
      Quiet time after excitation: 1184803636

    • Quiet time before excitation: 1184804866
      Excitation broadband: 1184804901
      Quiet time after excitation: 1184804926

    • Quiet time before excitation: 1184806156
      Excitation broadband: 1184806191
      Quiet time after excitation: 1184806216

    • Quiet time before excitation: 1184807446
      Excitation broadband: 1184807481
      Quiet time after excitation: 1184807506

    • Quiet time before excitation: 1184808736
      Excitation broadband: 1184808771
      Quiet time after excitation: 1184808796

    • Quiet time before excitation: 1184810027
      Excitation broadband: 1184810062
      Quiet time after excitation: 1184810087

    • Quiet time before excitation: 1184811317
      Excitation broadband: 1184811352
      Quiet time after excitation: 1184811377

    • Quiet time before excitation: 1184812607
      Excitation broadband: 1184812642
      Quiet time after excitation: 1184812667

  • More excitations

    • Quiet time before excitation: 1184878758
      Excitation broadband: 1184878794
      Quiet time after excitation: 1184878819

    • Quiet time before excitation: 1184880049
      Excitation broadband: 1184880084
      Quiet time after excitation: 1184880109

    • Quiet time before excitation: 1184881339
      Excitation broadband: 1184881374
      Quiet time after excitation: 1184881399

    • Quiet time before excitation: 1184882629
      Excitation broadband: 1184882664
      Quiet time after excitation: 1184882689

    • Quiet time before excitation: 1184883919
      Excitation broadband: 1184883954
      Quiet time after excitation: 1184883979

    • Quiet time before excitation: 1184885210
      Excitation broadband: 1184885245
      Quiet time after excitation: 1184885270

    • Quiet time before excitation: 1184886500
      Excitation broadband: 1184886536
      Quiet time after excitation: 1184886561

    • Quiet time before excitation: 1184887791
      Excitation broadband: 1184887826
      Quiet time after excitation: 1184887851

2017-07-24

  • 3:28pm valve closed, venting


 

 

  376   Mon Jul 24 16:06:11 2017 GabrieleGeneralMeasurementsS1600530 S1600532 S1600537 S1600539

2017-07-24

  • 3:55pm installed in chamber
    • S1600530 in CR1
    • S1600532 in CR2
    • S1600537 in CR3
    • S1600539 in CR4
  • 3:58pm roughing pump on
  • 4:06pm turbo pump on
  • Excitations:
    • Quiet time before excitation: 1184986754
      Excitation broadband: 1184986789
      Quiet time after excitation: 1184986814

    • Quiet time before excitation: 1184988044
      Excitation broadband: 1184988079
      Quiet time after excitation: 1184988104

    • Quiet time before excitation: 1184989334
      Excitation broadband: 1184989369
      Quiet time after excitation: 1184989394

    • Quiet time before excitation: 1184990625
      Excitation broadband: 1184990660
      Quiet time after excitation: 1184990685

    • Quiet time before excitation: 1184991915
      Excitation broadband: 1184991950
      Quiet time after excitation: 1184991975

    • Quiet time before excitation: 1184993205
      Excitation broadband: 1184993240
      Quiet time after excitation: 1184993265

    • Quiet time before excitation: 1184994495
      Excitation broadband: 1184994530
      Quiet time after excitation: 1184994555

    • Quiet time before excitation: 1184995785
      Excitation broadband: 1184995820
      Quiet time after excitation: 1184995845

2017-07-25

  • 11:00am valve closed, pumps stopped, venting
  377   Tue Jul 25 11:22:37 2017 GabrieleGeneralMeasurementsS1600548 S1600550 S1600538

2017-07-25

  • 11:12am in chamber (non standard order is not a typo!!)
    • S1600548 in CR1
    • S1600550 in CR2
    • S1600538 in CR3
  • 11:13am roughing pump on
  • 11:22am turbo pump on
  • Excitations:
    • Quiet time before excitation: 1185056320
      Excitation broadband: 1185056355
      Quiet time after excitation: 1185056380

    • Quiet time before excitation: 1185057610
      Excitation broadband: 1185057645
      Quiet time after excitation: 1185057670

    • Quiet time before excitation: 1185058900
      Excitation broadband: 1185058935
      Quiet time after excitation: 1185058960

    • Quiet time before excitation: 1185060190
      Excitation broadband: 1185060226
      Quiet time after excitation: 1185060251

    • Quiet time before excitation: 1185061481
      Excitation broadband: 1185061516
      Quiet time after excitation: 1185061541

    • Quiet time before excitation: 1185062771
      Excitation broadband: 1185062806
      Quiet time after excitation: 1185062831

    • Quiet time before excitation: 1185064061
      Excitation broadband: 1185064096
      Quiet time after excitation: 1185064121

    • Quiet time before excitation: 1185065351
      Excitation broadband: 1185065386
      Quiet time after excitation: 1185065411

2017-07-26

  • 4:05pm valve closed, pumps stopped, venting
  380   Wed Jul 26 16:22:22 2017 GabrieleGeneralMeasurementsS1600528 S1600531

2017-07-26

  • 4:14pm in chamber
    • S1600528 in CR1
    • S1600531 in CR2
  • 4:16pm roughing pump on
  • 4:23pm turbo pump on
  • Excitations
    • Quiet time before excitation: 1185160841
      Excitation broadband: 1185160876
      Quiet time after excitation: 1185160901

    • Quiet time before excitation: 1185168131
      Excitation broadband: 1185168167
      Quiet time after excitation: 1185168192

    • Quiet time before excitation: 1185175422
      Excitation broadband: 1185175457
      Quiet time after excitation: 1185175482

    • Quiet time before excitation: 1185182712
      Excitation broadband: 1185182747
      Quiet time after excitation: 1185182772

    • Quiet time before excitation: 1185190002
      Excitation broadband: 1185190038
      Quiet time after excitation: 1185190063

    • Quiet time before excitation: 1185197293
      Excitation broadband: 1185197329
      Quiet time after excitation: 1185197354

2017-07-27

  • 4:30pm, valve closed, pumps stopped, vented
  384   Mon Jul 31 13:21:37 2017 Gabriele, RosalieGeneralMeasurementsS1600520 S1600521 S1600523 S1600524

2017-07-31

  • 1:20pm in chamber
    • S1600520 in CR1
    • S1600521 in CR2
    • S1600523 in CR3
    • S1600524 in CR4
  • 1:21pm roughinp pump on
  • 1:30pm turbo pump on
  • Excitations:
    • Quiet time before excitation: 1185582780
      Excitation broadband: 1185582815
      Quiet time after excitation: 1185582840

    • Quiet time before excitation: 1185584070
      Excitation broadband: 1185584105
      Quiet time after excitation: 1185584130

    • Quiet time before excitation: 1185585360
      Excitation broadband: 1185585395
      Quiet time after excitation: 1185585420

    • Quiet time before excitation: 1185586650
      Excitation broadband: 1185586685
      Quiet time after excitation: 1185586710

    • Quiet time before excitation: 1185587940
      Excitation broadband: 1185587975
      Quiet time after excitation: 1185588000

    • Quiet time before excitation: 1185589230
      Excitation broadband: 1185589265
      Quiet time after excitation: 1185589290

    • Quiet time before excitation: 1185590520
      Excitation broadband: 1185590555
      Quiet time after excitation: 1185590581

    • Quiet time before excitation: 1185591811
      Excitation broadband: 1185591846
      Quiet time after excitation: 1185591871

2017-08-01

  • 9:55am, valve closed, venting, pumps off
  385   Tue Aug 1 10:19:39 2017 Gabriele, RosalieGeneralMeasurementsS1600519, S1600522

2017-08-01

  • 10:05am, in chamber
    • S1600519 in CR1
    • S1600522 in CR2
  • 10:11am, roughing pump on
  • 10:19am, turbo pump on
  • Excitations
    • Quiet time before excitation: 1185649996
      Excitation broadband: 1185650031
      Quiet time after excitation: 1185650056

    • Quiet time before excitation: 1185651286
      Excitation broadband: 1185651321
      Quiet time after excitation: 1185651346

    • Quiet time before excitation: 1185652576
      Excitation broadband: 1185652611
      Quiet time after excitation: 1185652636

    • Quiet time before excitation: 1185653866
      Excitation broadband: 1185653901
      Quiet time after excitation: 1185653926

    • Quiet time before excitation: 1185655156
      Excitation broadband: 1185655191
      Quiet time after excitation: 1185655216

    • Quiet time before excitation: 1185656446
      Excitation broadband: 1185656481
      Quiet time after excitation: 1185656506

    • Quiet time before excitation: 1185657737
      Excitation broadband: 1185657772
      Quiet time after excitation: 1185657797

    • Quiet time before excitation: 1185659027
      Excitation broadband: 1185659062
      Quiet time after excitation: 1185659087

2017-08-02

  • 11:25am valve closed, venting, pumps off
  387   Wed Aug 2 11:45:27 2017 Gabriele, RosalieGeneralMeasurementsS1600553, S1600554, S1600555, S1600556

2017-08-02

  • 11:33am in chamber
    • S1600553 in CR1
    • S1600554 in CR2
    • S1600555 in CR3
    • S1600556 in CR4
  • 11:35am roughing pump on
  • 11:45am turbo pump on
  • Excitations:
    • Quiet time before excitation: 1185760223
      Excitation broadband: 1185760258
      Quiet time after excitation: 1185760283

    • Quiet time before excitation: 1185767513
      Excitation broadband: 1185767548
      Quiet time after excitation: 1185767573

    • Quiet time before excitation: 1185774804
      Excitation broadband: 1185774839
      Quiet time after excitation: 1185774864

    • Quiet time before excitation: 1185782094
      Excitation broadband: 1185782129
      Quiet time after excitation: 1185782154

    • Quiet time before excitation: 1185789384
      Excitation broadband: 1185789419
      Quiet time after excitation: 1185789444

    • Quiet time before excitation: 1185796675
      Excitation broadband: 1185796710
      Quiet time after excitation: 1185796735

2017-08-03

  • 11:00am valve closed, pumps stopped, venting
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