40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 301 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  14556   Fri Apr 19 14:06:36 2019 gautamUpdatePSLInnolight NPRO shutoffWhen I got back from lunch just now, I
noticed that the PMC TRANS and REFL cameras
were showing no spots. I
 Screenshot_from_2019-04-19_14-06-11.png 
  14557   Fri Apr 19 15:13:38 2019 ranaUpdateSUSNo consistent solution for output matrixlet us
have 3 by 4, nevermore
  
  14558   Fri Apr 19 16:19:42 2019 gautamUpdateSUSActuation matrix still not orthogonalI repeated the exercise from yesterday,
this time driving the butterfly mode [+1
-1 -1 +1] and adding the tuned PIT and
  
  14559   Fri Apr 19 19:22:15 2019 ranaUpdateSUSActuation matrix still not orthogonalIf thy left hand troubles thee

then let the mirror show the right

for if it troubles enough to cut
  
  14560   Fri Apr 19 20:21:52 2019 gautamUpdatePSLInnolight NPRO shutoffHappened again at ~730pm.

The NPRO diag channels don't
really tell me what happened in a causal
 Screenshot_from_2019-04-19_20-27-04.png 
  14561   Mon Apr 22 21:33:17 2019 JonUpdateSUSBench testing of c1susaux replacementToday I bench-tested most of the Acromag
channels in the replacement c1susaux. I connected
a DB37 breakout board to each chassis feedthrough
  
  14562   Mon Apr 22 22:43:15 2019 gautamUpdateSUSETMY sensor diagnosis Here are the results from this test. The
data for 17 April is with the DC bias for
ETMY set to the nominal values (which gives
 ETMY_sensorSpectra_consolidated.pdf 
  14563   Tue Apr 23 18:48:25 2019 JonUpdateSUSc1susaux bench testing completedToday I tested the remaining Acromag channels and
retested the non-functioning channels found
yesterday, which Chub repaired this morning.
  
  14564   Tue Apr 23 19:31:45 2019 JonUpdateSUSWatchdog channels separated from autoBurt.reqFor the new c1susaux, Gautam and I moved
the watchdog channels from autoBurt.req to
a new file named autoBurt_watchdogs.req. When
  
  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 
  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 
  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
  
  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 
  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 
ELOG V3.1.3-