40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 349 of 349  Not logged in ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Typeup Category Subject Text Attachments
  17530   Wed Mar 29 19:19:41 2023 KojiUpdateALSX end green now indefinitely lockingStable
lock of the X End green laser was recovered.

- The biggest issue
  17531   Thu Mar 30 09:51:41 2023 PacoUpdateALSXALS / YALS power normalized and noise spectraAfter the XAUX - XARM lock was recovered
the C1:ALS-TRX_GAIN was set from 0.002 to
0.0006 to normalize the green transmission
  17540   Tue Apr 11 19:46:45 2023 RadhikaUpdateALSX end green now indefinitely lockingI measured the OLTF of the XAUX-PDH loop
[Attachment 1] now that the green laser is stably
locking. I injected an excitation (100mVpp)
  17543   Thu Apr 13 11:38:50 2023 AnchalUpdateALSMoku Phasemeter calibrationI calibrated the moku phasemeter setup
for reading beatnote fluctuations today.
The calibration is referred to the DFD output
  17544   Thu Apr 13 17:58:16 2023 PacoUpdateALSMoku Phasemeter calibration and ALS noiseDitto of 40m/17543
but for XBEAT >> Calibrated to 0.3061 +/-
  17545   Fri Apr 14 07:31:28 2023 JCUpdateGeneralAccelerometer for ToursI was able to get this accelerometer going
for the next Lab tours. I want to get this
guy up on a big screen to give people a nice
  17547   Tue Apr 18 19:29:43 2023 yutaUpdateBHDLO phase noise measurements in ITMX single bounce, MICH and FPMI[Anchal, Yuta]

We have repeated LO phase noise measurement
  17548   Wed Apr 19 09:52:50 2023 RadhikaUpdateNeuralNetRayleigh spectrogramsAttached are the Rayleigh spectrograms
of the error/control signal channels associated
with the NN nonlinear control of IMC
  17549   Wed Apr 19 11:35:20 2023 YehonathanUpdateBHDPRMI estimated noise budgetFirst, simple stuff. We estimate the noise
budget with total input and output noises.
Later, we will break it down (ADC, DAC, whitening,
  17552   Wed Apr 19 17:32:11 2023 AlexUpdateIMCBeam offset calculation for MC1,2,3 from dither resultsToday, we ran dither lines on the MC1,2,3
mirrors in YAW from 136598007
to 1365981967 and similarly
  17553   Wed Apr 19 22:46:17 2023 PacoUpdateALSDFD demod normalized by amplitude [Anchal, Paco]

We updated the LSC model to use
the amplitude as a normalization (analogous
  17554   Thu Apr 20 12:00:34 2023 ranaUpdateALSDFD demod normalized by amplitude how about the other idea of downloading
the I & Q channels and doing the analysis
offline? I'm curious if its better or
  17555   Thu Apr 20 23:51:14 2023 AnchalUpdateALSDFD demod normalized by amplitude I did offline analysis with the available
data. We were only saving signals at 2048
Hz rate, so analysis can not be done on 1.4
  17556   Fri Apr 21 14:31:26 2023 AnchalUpdateALSDFD demod normalized by amplitude Last night I took ITMY calibration data
using MICH with AS55_Q. Adding that to the
same plot. The error bars are probably underestimate
  17558   Mon Apr 24 10:53:39 2023 AlexUpdateGeneralSummary Pages FixedThis morning I found a helpful post in
the git.ligo pages that referred to the issue
that was stopping the summary pages from
  17559   Mon Apr 24 18:33:22 2023 AlexUpdateIMCBeam offset movement for MC1,2,3 in PIT and YAW from dither resultsMayank and I worked on finalizing the plots
for the beam offset from the dithering test
done in 17552.
  17561   Tue Apr 25 15:51:21 2023 JcUpdateIMCIMC has been tripping It has happened multiple times today that
IMC has tripped on its own. Yehonathan and
I have had to come back to manually lock
  17562   Tue Apr 25 17:06:17 2023 AnchalUpdateALSDFD demod normalized by amplitude I modified the analysis to correct for
any affects due to Anti-Aliasing or Anti-Imaging
filters, and I also found a insignificant
  17563   Tue Apr 25 21:21:03 2023 YehonathanUpdateBHDDewhitening noises{Mayank, Paco, Yehonathan}

Dewhitening noise curves were taken
using SR785+SR560 for the PRMI noise budget.
  17564   Wed Apr 26 09:37:10 2023 PacoUpdateBHDIQ demod board gains for REFL11 and AS55We
measured the IQ demodulation board gains
for REFL11 and AS55. 
  17566   Wed Apr 26 12:05:10 2023 RadhikaUpdateALSXEND green PDH controllerTl;dr:
Tried to replace of XEND green PDH servo
controller with Moku template IIR filter,
  17567   Wed Apr 26 12:59:42 2023 YehonathanUpdateBHDUpdated noise budget with output electronicsI included the output electronic noises
into the PRMI carrier noise budget (attachment
  17568   Wed Apr 26 18:41:56 2023 PacoUpdateOPLEV TablesITMX oplev laser died[Paco, Koji, Mayank]

We replaced ITMX Oplev
  17570   Fri Apr 28 18:40:49 2023 YehonathanUpdateBHDUpdated noise budget with some input electronic noises{Mayank, Yehonathan}

Yesterday, we measured AS55 and
REFL11 dark noises at the IQ demod boards
  17579   Wed May 3 12:11:52 2023 YehonathanUpdateBHDUpdated noise budget with measured noise and OLTF{Paco, Yehonathan, Yuta}

Paco and Yuta locked PRMI carrier
and I took the MICH OLTF measurement (attachment
  17582   Wed May 3 18:40:50 2023 YehonathanUpdateBHDWhitening noises measurements{Mayank, Yehonathan}

We measured the noise at the WF1
(REFL11) and WF2 (AS55) boards at the LSC
  17584   Mon May 8 17:05:30 2023 YehonathanUpdateBHDWhitening TF measurements{Mayank, Yehonathan}

We measured today the TFs of the
whitening boards. We measured in particular
  17585   Tue May 9 11:32:04 2023 YehonathanUpdateBHDWhitening TF measurements We forgot to take a reference TF measurement
by looping the SR785 on itself using the
same BNC cables used for the actual measurement.
  17586   Tue May 9 12:06:35 2023 RadhikaUpdateALSXEND green PDH controller[Mayank, Radhika]

I retook a transfer function measurement
of the uPDH servo closed-loop (using the
  17587   Tue May 9 21:02:55 2023 RadhikaUpdateALSXEND green PDH controllerXAUX
laser locked with Moku:Go controller

The analog zeros and poles used
  17588   Wed May 10 11:49:34 2023 YehonathanUpdateBHDUpdated PRMI AS55+REFL11 noise budgetI
added input noises and angle to length coupling
to the noise budget.
  17589   Wed May 10 17:11:34 2023 PacoUpdateASCFPMI differential ASC - II
began commissioning the AS WFS for (PR)FPMI
  17590   Thu May 11 12:05:24 2023 ranaUpdateBHDUpdated PRMI AS55+REFL11 noise budgetIs the A2L coming from the optical lever
feedback? If so, we can make a 30 Hz ELP
to cut it off by 60 Hz.
  17591   Sat May 13 11:37:41 2023 ranaUpdateGeneralStripTool -> NDscope: PSL on wallAs a test, I have replaced the PSL StripTool
on the north wall of the control room with
a nearly equivalent NDScope display. It is
  17593   Tue May 16 08:42:14 2023 PacoUpdateASCFPMI differential ASC - IIWe
aligned the AS WFS and measured some angular
motion from ETMX
  17594   Wed May 17 12:09:11 2023 YehonathanUpdateElectronicsPreping for new coil drivers commissioning in 1X4It's time to start commissioning the
new coil drivers. The Acromag box is already
there but it needs to be modified.
  17595   Fri May 19 09:23:58 2023 PacoUpdate MCF Noise The fan behind the
PSL controller is injecting excess band limited
  17597   Fri May 19 13:25:03 2023 KojiUpdatePSLMCF Noise This is super! And now is the time to replace
the internal fan!

  17598   Fri May 19 15:25:00 2023 MayankUpdatePSLPSL tripped - removed internal fansWe removed the PSL
controller internal (broken) fans after it
  17600   Wed May 24 13:19:28 2023 PacoUpdateBHDBH44 and BH55 dc transimpedance modifiedWe lowered the BH44
and BH55 DC transimpedances to ~ 50 V/A
  17601   Wed May 24 17:36:25 2023 PacoUpdateBHDBH44_I content and PRC alignmentBH44
is sensitive to PRC alignment noise

[Paco, Yuta]
  17603   Thu May 25 14:40:03 2023 PacoUpdateCalibrationMeasured the PSL wavelengthThe PSL wavelength
is 1064.5068 +- 0.0015 nm
  17605   Fri May 26 15:04:12 2023 JCUpdatePSLPSL Fans ReplacedWe Changed
The Fans on the PSL

start, the part Koji ordered is 259-1818-ND
ELOG V3.1.3-