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ID Dateup Author Type Category Subject Text Attachments
  14566   Wed Apr 24 16:06:44 2019 gautamUpdatePSLInnolight NPRO shutoffAfter discussing with Koji, I turned the
NPRO back on again, at ~4PM local time. I
first dialled the injection current down
 PMCrefl.png 
  14567   Wed Apr 24 17:07:39 2019 gautamUpdateSUSc1susaux in-situ testing [and future of IFOtest][jon, gautam]

For the in-situ test, I decided
that we will use the physical SRM to test
 2019-04-24_20-29.pdfScreenshot_from_2019-04-24_20-05-54.pngSRM_OSEMPD_WHT_ACROMAG.pdfDCVmon.png 
  14568   Wed Apr 24 17:39:15 2019 YehonathanSummaryLoss MeasurementBasic analysis of loss measurementMotivation


Getting myself familiar
with Python.
Characterize statistical
 LossMeasurementAnalysis.zipLossMeasurement_RawData.pdfLossMeasurement_Hist.pdfLossMeasurement_PSD.pdf 
  14569   Thu Apr 25 00:30:45 2019 gautamUpdateSUSETMY BR mode We briefly talked about the bounce and
roll modes of the SOS optic at the meeting
today. 
 ETMY_sensorSpectra_BRmode.pdfETMY_sensorSpectra_BRmode.pdfETMX_sensorSpectra_BRmode.pdfIMG_5993.JPG 
  14570   Thu Apr 25 01:03:29 2019 gautamUpdatePSLMC trans is ~1000 cts (~7%) lower than usualWhen dialing up the current, I went up
to 2.01 A on the front panel display, which
is what I remember it being. The label on
  
  14571   Thu Apr 25 03:32:25 2019 AnjaliUpdateFrequency noise measurementMZ interferometer ---> DAQ
Attachment #1 shows the time domain
output from this measurement. The contrast
between the maximum and minimum is better
 Time_domain_output.pdfFrequency_noise.pdfschematic_heterodyne_setup.pngNoise_budget_1_micron_in_Hz_per_rtHz.pdf 
  14572   Thu Apr 25 10:13:15 2019 ChubUpdateGeneralAir Handler Out of CommissionThe air handler on the roof of the 40M
that supplies the electronics shop and computer
room is out of operation until next week. 
  
  14573   Thu Apr 25 10:25:19 2019 gautamUpdateFrequency noise measurementHomodyne v HeterodyneIf I understand correctly, the Mach-Zehnder
readout port power is only a function of
the differential phase accumulated between
  
  14574   Thu Apr 25 10:32:39 2019 JonUpdateVACVac interlocks updatedI slightly cleaned up Gautam's disabling
of the UPS-predicated vac interlock and restarted
the interlock service. This interlock is
  
  14575   Thu Apr 25 11:27:11 2019 gautamUpdateVACPSL shutter re-openedThis activity seems to have closed the
PSL shutter (actually I'm not sure why
that happened - the interlock should only
  
  14576   Thu Apr 25 15:47:54 2019 AnjaliUpdateFrequency noise measurementHomodyne v HeterodyneMy understanding is that the main advantage
in going to the heterodyne scheme is that
we can extract the frequecy noise information
 Experimental_setup.JPG 
  14577   Thu Apr 25 17:31:56 2019 gautamUpdatePSLInnolight NPRO shutoffNPRO shutoff at ~1517  local time
today afternoon. Again, not many clues from
the NPRO diagnostics channel, but to my eye,
 EdwinShutoff20190425.pngEdwinShutdown_zoomOut.png 
  14578   Thu Apr 25 18:14:42 2019 AnjaliUpdatePSLDoor brokenIt is noticed that one of the doors (door
# 2 ) of the PSL table is broken. Attachement
#1 shows the image
 IMG_6069.JPG 
  14579   Fri Apr 26 12:10:08 2019 AnjaliUpdateFrequency noise measurementFrequency noise measurement of 1 micron sourceFrom the earlier results with homodyne
measurement,the Vmax and Vmin
values observed were comparable with
 Time_domain_data.pdfFrequency_noise_from_data_in_linear_region.pdf 
  14580   Fri Apr 26 12:32:35 2019 JonUpdatePSLmodbusPSL service shut downGautam and I are removing the prototype
Acromag chassis from the 1x4 rack to
make room for the new c1susuax hardware.
  
  14581   Fri Apr 26 19:35:16 2019 JonUpdateSUSNew c1susaux installed, passed first round of scripted testing[Jon, Gautam]

Today we installed the c1susaux
Acromag chassis and controller computer in
 IMG_3254.jpgIMG_3256.jpg 
  14582   Sun Apr 28 16:00:17 2019 gautamUpdateComputer Scripts / ProgramsList of suspension testHere are some tests we should script.


Checking Coil Vmons, OSEM
PDmons, and watchdog enable wiring

Disable
  
  14583   Mon Apr 29 16:25:22 2019 gautamUpdatePSLPSL turned on againI turned the 2W NPRO back on again at ~4pm
local time, dialing the injection current
up from 0-2A in ~2 mins. I noticed today
  
  14584   Mon Apr 29 16:34:27 2019 gautamUpdateElectronicsITMX/IMTY mis-labelling fixed at 1X4 and 1X5After the X and Y arm naming conventions
were changed, the labelling of the electronics
in the eurocrates was not changed 😞
 IMG_7400.JPGIMG_7401.JPG 
  14585   Mon Apr 29 19:23:49 2019 JonUpdateComputer Scripts / ProgramsScripted tests of suspension VMons using fast systemI've added a scripted VMon/coil-enable
test to PyIFOTest
following the suggestion in #15542.
  
  14586   Tue Apr 30 17:27:35 2019 AnjaliUpdateFrequency noise measurementFrequency noise measurement of 1 micron sourceWe repeated the homodyne measurement to
check whether we are measuring the actual
frequency noise of the laser. The idea was
 Homodyne_repeated_measurement.zip 
  14587   Thu May 2 10:41:50 2019 gautamUpdateSUSSOS Magnet polarityA concern was raised about the two ETMs
and ITMX having the opposite response (relative
to the other 7 SOS optics) in the OSEM PDmon
  
  14588   Thu May 2 10:59:58 2019 JonUpdateSUSc1susux in situ wiring testing completedSummary

Yesterday Gautam and
I ran final tests of the eight suspensions
controlled by c1susaux, using PyIFOTest.
 Screen_Shot_2019-05-02_at_12.15.39_PM.pngScreen_Shot_2019-05-02_at_12.23.21_PM.pngScreen_Shot_2019-05-02_at_12.30.53_PM.png 
  14589   Thu May 2 15:15:15 2019 JonOmnistructureComputerssusaux machine renamedNow that the replacement susaux machine
is installed and fully tested, I renamed
it from c1susaux2 to c1susaux and updated
  
  14590   Thu May 2 15:35:54 2019 JonOmnistructureUpgradec1susaux upgrade documentationFor future reference:


The updated list
of c1susaux channel wiring (includes the
  
  14591   Fri May 3 09:12:31 2019 gautamUpdateSUSAll vertex SUS watchdogs were trippedI found the 8 vertex watchdogs tripped
today morning. The ETMs were fine, suggesting
this was not an actual earthquake. I suspect
 SUSwatchdogs.png 
  14592   Fri May 3 12:48:40 2019 gautamUpdateSUS1X4/1X5 cable adminChub and I crossed off some of these items
today morning. The last bullet was addressed
by Jon yesterday. I added a couple of
 D38CC485-1EB6-4B34-9EB1-2CB1E809A21A.jpeg 
  14593   Fri May 3 12:51:58 2019 gautamUpdatePSLPSL turned on againPer instructions from Coherent, I made
the some changes to the NPRO settings. The
value we were operating at is in the column
  
  14594   Fri May 3 15:40:33 2019 gautamUpdateGeneralCVI 2" beamsplitters deliveredFour new 2" CVI 50/50 beamsplitters
(2 for p-pol and 2 for s-pol) were delivered.
They have been stored in the optics cabinet,
  
  14595   Mon May 6 10:51:43 2019 gautamUpdatePSLPSL turned off againAs we have seen in the last few weeks,
the laser turned itself off after a few hours
of running. So bypassing the lab interlock
 NPROshutoff.png 
  14596   Mon May 6 11:05:23 2019 JonUpdateSUSAll vertex SUS watchdogs were trippedYes, this was a consequence of the systemd
scripting I was setting up. Unlike the old
susaux system, we decided for safety NOT
  
  14597   Wed May 8 19:04:20 2019 ranaUpdatePSLPSL turned on again
Increased PSL HEPA Variac from
30 to 100% to get more airflow.
All
of the TEC setpoints seem cold to me, so
  
  14598   Wed May 8 22:11:46 2019 ranaSummaryComputersnew laptop setup: ASIA - yum issues
setup controls user using K Thorne
LLO CDS offsite workstation instructions
modified
/etc/fstab ala pianosa to NFS mount disks
set
  
  14599   Thu May 9 19:50:04 2019 gautamUpdatePSLPSL turned off againThis time, it stayed on for ~24 hours.
I am not going to turn it on again today
as the crane inspection is tomorrow and we
 Screenshot_from_2019-05-09_19-49-29.png 
  14600   Thu May 9 22:26:39 2019 JonOmnistructurePSLSecond ADC added to PSL Acromag crateThis evening I added a second ADC module
to the prototype Acromag chassis. This chassis
can now read out all the PSL diagnostic channels.
 IMG_3291.jpg 
  14601   Fri May 10 13:00:25 2019 ChubUpdateGeneralcrane inspection completeThe 40M jib cranes all passed inspection!  20190510_110245.jpg 
  14602   Fri May 10 15:18:04 2019 gautamUpdatePSLSome work on/around PSL table
In anticipation of installing the
new fan on the PSL, I disconencted the old
fan and finally removed
 IMG_7427.JPGIMG_7428.JPGIMG_7429.JPGnewPSLAcro.png 
  14603   Fri May 10 18:24:29 2019 gautamUpdateNoiseBudgetaligoNBI pulled the aligoNB git repo to /ligo/GIT/aligoNB/aligoNB.   
  14604   Sat May 11 11:48:54 2019 JonUpdatePSLSome work on/around PSL tableI took a look at the error being encountered
by the modbusPSL service. The problem is
that the 
  
  14605   Mon May 13 10:45:38 2019 gautamUpdatePSLPSL turned ON againI used some double-sided tape to attach
a San
Ace 60 9S0612H4011 to the Innolight controller
 IMG_7431.JPG 
  14606   Mon May 13 18:48:32 2019 gautamUpdateGeneralVent prep
c1auxey and c1aux VME crates were
keyed.
EX and EY NPROs were turned
on.
Y arm was aligned to the IR
 ventPrep_20190514.pngdriftMon_20190514.pnglowPowIMC.pngIMG_7434.JPG 
  14607   Tue May 14 10:35:58 2019 gautamUpdateGeneralVent underway
PSL had stayed on overnight. There
was an EQ (M 4.6 near Costa Rica) which showed
up on the Seis BLRMS, and I noticed that
 vent.pngScreenshot_from_2019-05-14_16-35-16.png 
  14608   Wed May 15 00:40:19 2019 gautamUpdateSUSETMY diagnosis planI collected some free-swinging data from
earlier today evening. There are still only
3 peaks visible in the ASDs, see Attachment
 ETMY_sensorSpectra.pdf 
  14609   Wed May 15 10:56:47 2019 gautamUpdatePSLPSL turned ON againTo test the hypothesis that the fan replacement
had any effect on the NPRO shutoff phenomena,
I turned the HEPA on the PSL table down to
  
  14610   Wed May 15 10:57:57 2019 gautamUpdateSUSEY chamber opened[chub, gautam]


Vented the EE annulus.
Took
the heavy door off, put it on the wooden
  
  14611   Wed May 15 17:46:24 2019 gautamUpdateSUSETMY inspectionI setup the usual mini-cleanroom setup
around the ETMY chamber. Then I carried out
the investigative plan outlined here.
 firstContactFiber.JPGETMY_sensorSpectra.pdf 
  14612   Wed May 15 19:36:29 2019 KojiUpdateSUSETMY instepctionA pair of tweezer is OK as long as there
is no magnets around. You need to (somewhat)
constrain the mirror with the EQ stops so
  
  14613   Thu May 16 13:07:14 2019 gautamUpdateSUSFirst contact residue removalI  used a pair of tweezers to remove
the stray fiber of first contact. As Koji
predicted, this was rather dry and so it
 etmy_sensors.pdfetmy_BRmode.pdf 
  14614   Thu May 16 22:58:25 2019 gautamUpdateASSIn air ASS test with green?We were wondering yesterday if we can somehow
test the ASS system in air. Though the arm
cavity can be locked with the low power IMC
  
  14615   Thu May 16 23:31:55 2019 gautamUpdateSUSETMY suspension characterizationHere is my analysis. I think there are
still some problems with this suspension.

 6x 
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