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ID Datedown Author Type Category Subject Text Attachments
  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
  
  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 
  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
  
  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 
  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.
  
  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 
  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
  
  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
  
  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 
  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.
  
  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 
  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 
  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 
  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 
  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
  
  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
  
  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
  
  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. 
  
  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 
  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
  
  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 
  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 
  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 
  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 
  14565   Wed Apr 24 11:22:59 2019 awadeBureaucracyEquipment loanBorrowed Zurich HF2LI Lock in Amplifer to QILBorrowed Zurich HF2LI Lock in Amplifer
to QIL lab Wed Apr 24 11:25:11 2019.
  
  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
  
  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.
  
  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 
  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
  
  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 
  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
  
  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
  
  14557   Fri Apr 19 15:13:38 2019 ranaUpdateSUSNo consistent solution for output matrixlet us
have 3 by 4, nevermore
  
  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 
  14555   Fri Apr 19 12:06:31 2019 awadeBureaucracyElectronicsBorrowed Busby Box May 19th 2019I've borrowed the Busby Box for a day
or so.  Location: QIL lab at Bridge
West.
  
  14554   Fri Apr 19 11:36:23 2019 gautamUpdateSUSNo consistent solution for output matrixTher isn't a consistent set of OSEM
coil gains that explains the best actuation
vectors we determined yesterday. Here are
  
  14553   Fri Apr 19 09:42:18 2019 KojiBureaucracyGeneralItem borrowing (40m->OMC)Apr 16, 2019
Borrowed
two laser goggles from the 40m. (Returned
  
  14552   Thu Apr 18 23:10:12 2019 gautamUpdateLoss MeasurementX arm misalignedYehonathan wanted to take some measurements
for loss determination. I misaligned the
X arm completely and we installed a PD on
  
  14551   Thu Apr 18 22:35:23 2019 gautamUpdateSUSETMY actuator diagnosis [rana, gautam]

Rana did a checkout of my story
  
  14550   Wed Apr 17 18:12:06 2019 gautamUpdateVACVac interlock tripped againAfter getting the go ahead from Chub and
Jon, I restored the Vacuum state to "Vacuum
normal", see Attachment #1. Steps:
 Screenshot_from_2019-04-17_18-11-45.pngScreenshot_from_2019-04-17_18-21-30.png 
  14549   Wed Apr 17 11:01:49 2019 gautamUpdateALSLarge 2kHz peak (and harmonics) in ALS X no moreEX green stayed locked to XARM length overnight
without a problem. The spectrogram doesn't
show any alarming time varying features around
 EX_PDH_specGram.pdf 
  14548   Wed Apr 17 00:50:17 2019 gautamUpdateALSLarge 2kHz peak (and harmonics) in ALS X no moreI looked into this issue today. Initially,
my thinking was that I'd somehow caused
clipping in the beampath somewhere which
 EX_PDHnoise.pdf 
  14547   Wed Apr 17 00:43:38 2019 gautamUpdateFrequency noise measurementMZ interferometer ---> DAQ
Delay fiber was replaced with 5m
(~30 nsec delay)

The fringing
of the MZ was way too large even with the
  
  14546   Tue Apr 16 22:06:51 2019 gautamUpdateVACVac interlock tripped againThis happened again, about 30,000 seconds
(~2:06pm local time according to the logfile)
ago. The cited error was the same -
 Screenshot_from_2019-04-16_22-05-47.pngScreenshot_from_2019-04-16_22-06-02.png 
  14545   Mon Apr 15 22:55:34 2019 gautamFrogsThermal CompensationLab thermostat adjustedIt is feeling cold in the office area.
According to the digital wall clock near
the coffee machine, it is 19C. Rana bumped
  
  14544   Mon Apr 15 22:39:10 2019 gautamUpdateFrequency noise measurementAlternate setup with PSL pickoff[anjali, gautam]

just main points, anajli is going
to fill out the details.
  
  14543   Mon Apr 15 18:29:07 2019 ranaSummaryComputersnew laptop setup: ASIA - yum issueshad trouble using YUM to update. This turned
out to be a config problem with our Martian
router, not the new laptop. Since I've
  
  14542   Mon Apr 15 18:13:23 2019 ranaUpdateComputer Scripts / ProgramsAutomated suspension testing with susPythonif this gonna be general for everybody,
maybe it oughta be called IFOtest
(like the last incarnation that was tried
  
  14541   Mon Apr 15 10:20:44 2019 gautamUpdateOptical LeversBS Oplev PIT was oscillatingThe AS spot on the camera was oscillating
at ~3 Hz. Looking at the Oplevs, the culprit
was the BS PIT DoF. Started about 12 hours
 BS_OL_oscillating.png 
  14540   Fri Apr 12 01:22:27 2019 AnjaliUpdateFrequency noise measurementFrequency noise measurement of 1 micron sourceThe alignement was disturbed after the
replcement of the beam splitter. We tried
to get the alignment back . But we are
  
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