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  Coating Ring-down Measurement Lab elog, Page 16 of 18  Not logged in ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Authorup Type Category Subject
  838   Mon Feb 24 10:46:19 2020 GabrieleGeneralMeasurementsS1800100 S1800101 S1800102

2020-02-24

  • 10:44 am in chamber
    • S1800100 in CR1
    • S1800101 in CR2
    • S1800102 in CR3
  • 10:45 am roughing pump on
  • 10:55 am turbo pump on
  839   Wed Mar 4 11:46:21 2020 GabrieleGeneralMeasurementsS1600735 S1600786 S1600787

2020-03-04

  • 11:45am in chamber
    • S1600735 in CR1
    • S1600786 in CR2
    • S1600787 in CR3
  • 11:46am roughing pump on
  • 11:56am turbo pump on
  840   Fri Mar 6 09:13:06 2020 GabrieleGeneralMeasurementsS1600735 S1600786 S1600787

2020-03-06

  • 9:11am in chamber
    • S1600735 in CR1
    • S1600786 in CR2
    • S1600787 in CR3
  • 9:12am roughing pump on
  • 9:22am turbo pump on
  841   Sat Mar 7 16:06:39 2020 GabrieleGeneralMeasurementsS1600735 S1600786 S1600787

2020-03-07

  • 4:05pm in chamber
    • S1600735 in CR1
    • S1600786 in CR2
    • S1600787 in CR3
  • 4:06pm roughing pump on
  • 4:16pm turbo pump on
  842   Mon Mar 9 08:47:15 2020 GabrieleGeneralMeasurementsS1800515 S1800519

2020-01-30

  • 8:45 am in chamber
    • S1800515 in CR1
    • S1800519 in CR2
  • 8:46 am roughing pump on
  • 8:55 am turbo pump on
  843   Tue Mar 10 16:28:25 2020 GabrieleGeneralMeasurementsS1600739 S1600740 S1600786 S1600787

2020-03-10

  • 4:25pm in chamber
    • S1600739 in CR1
    • S1600740 in CR2
    • S1600786 in CR3
    • S1600787 in CR4
  • 4:27pm roughing pump on
  • 4:37pm turbo pump on
  844   Thu Mar 12 16:49:10 2020 GabrieleGeneralMeasurementsS1600793 S1600794 S1600795 S1600796

2020-03-12

  • 4:48pm in chamber
    • S1600793 in CR1
    • S1600794 in CR2
    • S1600795 in CR3
    • S1600796 in CR4
  • 4:49pm roughing pump on
  • 4:59pm turbo pump on
  845   Fri Mar 13 10:07:48 2020 GabrieleGeneralMeasurementsS1600797 S1600798 S1600799 S1600800

2020-03-13

  • 10:05am in chamber
    • S1600797 in CR1
    • S1600798 in CR2
    • S1600799 in CR3
    • S1600800 in CR4
  • 10:06am roughing pump on
  • 10:16am turbo pump on
  846   Tue Mar 17 12:28:56 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600785 S1600788

2020-03-17

  • 12:27pm in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600785 in CR3
    • S1600788 in CR4
  • 12:28pm roughing pump on
  • 12:38pm turbo pump on
  847   Wed Mar 18 13:34:24 2020 GabrieleGeneralMeasurementsS1600739 S1600740 S1600786 S1600787

2020-03-18

  • 1:33pm in chamber
    • S1600739 in CR1
    • S1600740 in CR2
    • S1600786 in CR3
    • S1600787 in CR4
  • 1:34pm roughing pump on
  • 1:44pm turbo pump on
  848   Thu Mar 19 16:14:04 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600785 S1600788

2020-03-19

  • 4:13pm in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600785 in CR3
    • S1600788 in CR4
  • 4:15pm roughing pump on
  • 4:25pm turbo pump on
  849   Thu Mar 19 16:22:38 2020 GabrieleGeneralMeasurementsS1600789

2020-03-19

  • 4:21pm in chamber
    • S1600789 in CR0
  • 4:22pm roughing pump on
  • 4:55pm turbo pump on
  850   Tue Mar 24 14:31:31 2020 GabrieleGeneralMeasurementsS1600789 S1600790 S1600791

2020-03-19

  • 2:43pm in chamber
    • S1600789 in CR1
    • S1600790 in CR2
    • S1600791 in CR3
  • 2:44pm roughing pump on
  • 2:55pm turbo pump on
  851   Wed Mar 25 18:14:45 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600785 S1600788

2020-03-25

  • 6:13pm in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600785 in CR3
    • S1600788 in CR4
  • 6:17pm roughing pump on
  • 6:27pm turbo pump on
  852   Thu Mar 26 13:34:20 2020 GabrieleGeneralMeasurementsS1600789 S1600791

2020-03-26

  • 1:34pm in chamber
    • S1600789 in CR1
    • S1600791 in CR2
  • 1:36pm roughing pump on
  • 1:45pm turbo pump on
  853   Fri Mar 27 15:32:29 2020 GabrieleGeneralMeasurementsS1600789 S1600791

2020-03-27

  • 3:31pm in chamber
    • S1600789 in CR1
    • S1600791 in CR2
  • 3:32pm roughing pump on
  • 3:40pm turbo pump on
  855   Tue Mar 31 18:56:31 2020 GabrieleGeneralMeasurementsS1600775 S1600788

2020-03-31

  • 7:05pm in chamber
    • S1600775 in CR1
    • S1600788 in CR2
  • 7:09pm roughing pump on
  • 7:18pm turbo pump on
  856   Thu Apr 2 14:07:18 2020 GabrieleGeneralMeasurementsS1600784 S1600785 S1600789 S1600791

2020-04-02

  • 2:05 pm in chamber
    • S1600784 in CR1
    • S1600785 in CR2
    • S1600789 in CR3
    • S1600791 in CR4
  • 2:07 pm roughing pump on
  • 2:17 pm turbo pump on
  857   Fri Apr 3 10:26:00 2020 GabrieleGeneralMeasurementsS1600775 S1600788

2020-04-03

  • 10:24am in chamber
    • S1600775 in CR1
    • S1600788 in CR2
  • 10:25am roughing pump on
  • 10:35am turbo pump on
  858   Tue Apr 7 10:06:43 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600788 S1600791

2020-04-07

  • 10:05 am in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600788 in CR3
    • S1600791 in CR4
  • 10:06 am roughing pump on
  • 10:16 am turbo pump on
  859   Tue Apr 7 15:50:24 2020 GabrieleGeneralMeasurementsS1600785 S1600789

2020-04-07

  • 3:50pm in chamber
    • S1600785 in CR1
    • S1600789 in CR2
  • 3:53pm roughing pump on
  • 4:03pm turbo pump on
  860   Thu Apr 9 13:47:38 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600788 S1600791

2020-04-09

  • 1:46 pm in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600788 in CR3
    • S1600791 in CR4
  • 1:47 pm roughing pump on
  • 1:57 pm turbo pump on
  861   Fri Apr 10 10:20:01 2020 GabrieleGeneralMeasurementsS1600785 S1600789

2020-04-10

  • 10:17am in chamber
    • S1600785 in CR1
    • S1600789 in CR2
  • 10:20am roughing pump on
  • 10:30am turbo pump on
  862   Tue Apr 14 12:19:57 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600788 S1600791

2020-04-14

  • 12:18 pm in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600788 in CR3
    • S1600791 in CR4
  • 12:19 pm roughing pump on
  • 12:29 pm turbo pump on
  863   Tue Apr 14 18:35:59 2020 GabrieleGeneralMeasurementsS1600785 S1600789

2020-04-14

  • 6:35pm in chamber
    • S1600785 in CR1
    • S1600789 in CR2
  • 6:40pm roughing pump on
  • 6:48pm turbo pump on
  864   Thu Apr 16 14:23:11 2020 GabrieleGeneralMeasurementsS1600775 S1600784 S1600788 S1600791

2020-04-16

  • 2:21 pm in chamber
    • S1600775 in CR1
    • S1600784 in CR2
    • S1600788 in CR3
    • S1600791 in CR4
  • 2:22 pm roughing pump on
  • 2:30 pm turbo pump on
  865   Fri Apr 17 10:18:17 2020 GabrieleGeneralMeasurementsS1600785 S1600789

2020-04-17

  • 10:17am in chamber
    • S1600785 in CR1
    • S1600789 in CR2
  • 10:20am roughing pump on
  • 10:28am turbo pump on
  866   Thu Apr 23 14:02:25 2020 GabrieleGeneralMeasurementsS1600776

2020-04-23

  • 2:00pm in chamber
    • S1600776 in CR1
  • 2:02pm roughing pump on
  • 2:12pm turbo pump on
  867   Fri Apr 24 10:53:40 2020 GabrieleGeneralMeasurementsS1600801 S1600802 S1600803 S1600804

2020-04-24

  • 10:51 am in chamber
    • S1600801 in CR1
    • S1600802 in CR2
    • S1600803 in CR3
    • S1600804 in CR4
  • 10:52 am roughing pump on
  • 11:00 am turbo pump on
  868   Mon Apr 27 10:26:29 2020 GabrieleGeneralMeasurementsS1600805 S1600806 S1600807 S1600808

2020-04-24

  • 10:25 am in chamber
    • S1600805 in CR1
    • S1600806 in CR2
    • S1600807 in CR3
    • S1600808 in CR4
  • 10:28 am roughing pump on
  • 10:38 am turbo pump on
  869   Thu May 28 11:43:19 2020 GabrieleGeneralMeasurementsS1600801 S1600802 S1600803 S1600805 S1600806

2020-05-28

  • 11:40 am in chamber
    • S1600801 in CR1
    • S1600802 in CR2
    • S1600803 in CR3
    • S1600805 in CR4
    • S1600806 in CR0
  • 11:43 am roughing pumps on
  • 11:53 am turbo pump CR1-4 on
  •  turbo pump CR0 on not on yet
  870   Fri May 29 10:10:51 2020 GabrieleGeneralMeasurementsS1600806

2020-05-28

  • 10:00 am in chamber
    • S1600806 in CR1
  • 10:05 am roughing pumps on
  • 10:15 am turbo pump CR1-4 on
  871   Tue Jun 2 10:16:40 2020 GabrieleGeneralMeasurementsS1600801 S1600802

2020-06-02

  • 10:15 am in chamber
    • S1600801 in CR1
    • S1600802 in CR2
  • 10:20 am roughing pumps on
  • 10:30 am turbo pump CR1-4 on
  872   Fri Jun 5 18:55:27 2020 GabrieleGeneralMeasurementsS1600803 GaAs

2020-06-05

  • 6:50 pm in chamber
    • S1600803 in CR1
    • GaAs in CR2
  • 6:55 pm roughing pumps on
  • 7:05 pm turbo pump CR1-4 on
  873   Tue Jun 9 11:04:28 2020 GabrieleGeneralMeasurementsGaAs S1600805

2020-06-09

  • 11:00 am in chamber
    • GaAs in CR1
    • S1600805 in CR2
  • 11:04 am roughing pumps on
  • 11:15 am turbo pump CR1-4 on
  874   Mon Jun 15 19:32:31 2020 GabrieleGeneralMeasurementsS1600803 GaAs

2020-06-15

  • 7:32 pm in chamber
    • S1600803 in CR1
    • GaAs in CR2
  • 7:36 pm roughing pumps on
  • 7:46 pm turbo pump CR1-4 on
  875   Tue Jun 16 15:43:29 2020 GabrieleGeneralMeasurementsS1600805

2020-06-16

  • 3:42 pm in chamber
    • S1600805 in CR1
  • 3:45 pm roughing pumps on
  • 3:55 pm turbo pump CR1-4 on
  876   Thu Jun 18 17:46:51 2020 GabrieleGeneralMeasurementsS1600806

2020-06-18

  • 5:45 pm in chamber
    • S1600806 in CR1
  • 5:50 pm roughing pumps on
  • 6:00 pm turbo pump CR1-4 on
  877   Tue Jun 23 16:22:42 2020 GabrieleGeneralMeasurementsS1600806

2020-06-23

  • 4:20 pm in chamber
    • S1600806 in CR1
  • 4:21 pm roughing pumps on
  • 4:31 pm turbo pump CR1-4 on
  878   Wed Jun 24 14:17:45 2020 GabrieleGeneralMeasurementsS1600805 S1600806

2020-06-24

  • 2:26 pm in chamber
    • S1600805 in CR1
    • S1600806 in CR1
  • 2:27 pm roughing pumps on
  • 2:37 pm turbo pump CR1-4 on
  879   Thu Jun 25 08:49:24 2020 GabrieleGeneralMeasurementsS1600803 S1600805 S1600806

2020-06-25

  • 8:47 am in chamber
    • S1600803 in CR1
    • S1600805 in CR2
    • S1600806 in CR3
  • 8:49 am roughing pumps on
  • 9:00 am turbo pump CR1-4 on
  880   Wed Jul 1 13:43:53 2020 GabrieleGeneralMeasurementsS1600803 in

2020-07-01

  • 1:42 pm in chamber
    • S1600803 in CR1
  • 1:43 pm roughing pumps on
  • 1:53 pm turbo pump CR1-4 on
  881   Thu Jul 2 14:43:09 2020 GabrieleGeneralMeasurementsS1600794 S1600795 S1600796 S1600797

2020-07-02

  • 2:41 pm in chamber
    • S1600794 in CR1
    • S1600795 in CR2
    • S1600796 in CR3
    • S1600797 in CR4
  • 2:42 pm roughing pump on
  • 2:52 pm turbo pump on
  882   Tue Jul 7 15:40:44 2020 GabrieleGeneralMeasurementsS1600809 S1600810 S160081 S1600812

2020-07-02

  • 3:39 pm in chamber
    • S1600809 in CR1
    • S1600810 in CR2
    • S1600811 in CR3
    • S1600812 in CR4
  • 3:40 pm roughing pump on
  • 3:50 pm turbo pump on
  30   Thu Jul 7 16:40:22 2016 Gabriele ElectronicsDaily ProgressQPD boxes

To mitigate the issue of ambient light pulluting the QPD signal, I mounted the prototype into a custum built box. This helps a lot. My plan is to add a short piece of black pipe in the front, to further shield from incident light.

The new box also provides a clean way to mount the QPD.

  485   Tue Mar 13 17:20:09 2018 Gabriele Alena GeneralMeasurementsS1600609 S1600611 S1600612 S1600613

2018-03-13

  • 5:15pm in chamber
    • S1600609 in CR1
    • S1600611 in CR2
    • S1600612 in CR3
    • S1600613 in CR4
  • 5:20pm roughing pump on
  • 5:34pm turbo pump on
  480   Thu Mar 8 11:27:01 2018 Gabriele Alena Eric LiyuanGeneralMeasurementsS1600620 S1600621 S1600623 S1600624

2018-03-08

  • 11:00am in chamber
    • S1600620 in CR1
    • S1600621 in CR2
    • S1600623 in CR3
    • S1600624 in CR4
  • 11:10am roughing pump on
  • 11:20am turbo pump on
  445   Mon Dec 11 08:49:08 2017 Gabriele, Aaron, Brittany, SethGeneralMeasurements50mm / 0.5mm substrate from University Wafers
  • Installed in the test chamber CR0
  • Excitations:
    • Quiet time before excitation: 1196822477
      Excitation broadband: 1196822509
      Quiet time after excitation: 1196822532
    • Quiet time before excitation: 1196826162
      Excitation broadband: 1196826194
      Quiet time after excitation: 1196826216
    • Quiet time before excitation: 1196829846
      Excitation broadband: 1196829879
      Quiet time after excitation: 1196829901
    • Quiet time before excitation: 1196833531
      Excitation broadband: 1196833563
      Quiet time after excitation: 1196833585
    • Quiet time before excitation: 1196837215
      Excitation broadband: 1196837248
      Quiet time after excitation: 1196837270
    • Quiet time before excitation: 1196840900
      Excitation broadband: 1196840933
      Quiet time after excitation: 1196840955
    • Quiet time before excitation: 1196844585
      Excitation broadband: 1196844617
      Quiet time after excitation: 1196844639
    • Quiet time before excitation: 1196848269
      Excitation broadband: 1196848301
      Quiet time after excitation: 1196848323
       

 

  101   Mon Aug 22 16:59:13 2016 Gabriele, AlastairOpticsDaily ProgressLaser polishing of the disk edges

We set up a test facility for laser polishing the disk edges, using the CO2 laser in the TCS laboratory. We focused the beam with a 10" focal length lens, and installed the disk on a "rotation stage" that we motorized with a hand drill. We used a HeNe optical lever and a small container with water to define the horizontal plane and adjusted the disk as well as we could.

We first tested the procedure on the MO02 disk, which is the one already scared with the electrostatic drive burn mark. This disk is now definitely in bad shape. However, we felt confident in our procedure, so we took out the MO03 disk that was into the measurement system and proceeded to laser polish the edges. Things went quite smothly. Unfortunately we added some small damages to the disk surface in a couple of spots where the CO2 laser went out of alignment and melted the fused silica support of the disk. The edge however looks quite good now.

Q measurement is on-going at the timw of writing

  192   Wed Nov 16 09:43:25 2016 Gabriele, AlastairGeneralDaily ProgressCO2 laser polishing setup

Yesterday we assembled the lase polishing system. The Co2 laser power can be controlled using a waveplate, so we can turn on the laser at maximum power and let it stabilize, before actually turning up the power sent to the disk.

The beam is focused with a 10" focal length lens, and sent to the disk edge, poiting slightly upward to avoid hitting any other part of the disk.

The disk is moved with a combination of a linear and rotation stage, controlled with a MATLAB script. We tuned the translation and rotation speed so that the edge always moves at about 0.5 mm/s. Some refinement of the movimentation procedure will follow.

We tried the setup with one of the damaged samples, and the results are quite good.

More work this afternoon

Attachment 2: 2016-11-15_16.35.14.jpg
2016-11-15_16.35.14.jpg
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