40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 1 of 349  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  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
  17604   Fri May 26 11:16:46 2023 AnchalSummaryPEMTemperature sensing circuit with AD590I wanted to mention here that I have a
printed circuit board design (LIGO-D1800304)
for using AD590 as temperature sensors. I
  17603   Thu May 25 14:40:03 2023 PacoUpdateCalibrationMeasured the PSL wavelengthThe PSL wavelength
is 1064.5068 +- 0.0015 nm
  17602   Thu May 25 13:38:28 2023 advaitSummaryPEMExisting temperature control hardwareOver the past few days I have been trying
to understand the existing sensor and heater
related hardware by manual inspection and
  17601   Wed May 24 17:36:25 2023 PacoUpdateBHDBH44_I content and PRC alignmentBH44
is sensitive to PRC alignment noise

[Paco, Yuta]
  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
  17599   Wed May 24 11:50:34 2023 JCSummarySEISTACIS [Mayank, JC]

  17598   Fri May 19 15:25:00 2023 MayankUpdatePSLPSL tripped - removed internal fansWe removed the PSL
controller internal (broken) fans after it
  17597   Fri May 19 13:25:03 2023 KojiUpdatePSLMCF Noise This is super! And now is the time to replace
the internal fan!

  17595   Fri May 19 09:23:58 2023 PacoUpdate MCF Noise The fan behind the
PSL controller is injecting excess band limited
  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.
  17593   Tue May 16 08:42:14 2023 PacoUpdateASCFPMI differential ASC - IIWe
aligned the AS WFS and measured some angular
motion from ETMX
  17592   Mon May 15 18:34:05 2023 PacoSummaryLSCLocked PRMI in carrier and LO phase with BH44 and achieved handoff to BHDC_DIFF[Yuta, Paco]

We locked PRMI-BHD
  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
  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.
  17589   Wed May 10 17:11:34 2023 PacoUpdateASCFPMI differential ASC - II
began commissioning the AS WFS for (PR)FPMI
  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.
  17587   Tue May 9 21:02:55 2023 RadhikaUpdateALSXEND green PDH controllerXAUX
laser locked with Moku:Go controller

The analog zeros and poles used
  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
  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.
  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
  17583   Thu May 4 17:14:15 2023 PacoSummaryLSCPRMI (MICH and PRCL) calibrated displacement and BS angle to MICH couplings[Mayank, Paco]

We calibrated PRCL
  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
  17581   Wed May 3 16:24:07 2023 PacoSummaryLSCAttenuated BHD RFPD paths[Yuta, Paco]

We attenuated RFPD
  17580   Wed May 3 15:06:44 2023 yutaSummaryLSCPOP attenuation and PRMI PRG estimate[Paco, Yuta]

  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
  17578   Tue May 2 17:33:53 2023 MayankSummaryLSCLocked PRMI in carrier for an hour with LO phase controlled using BH55[Mayank, Radhika, Paco]

We locked PRMI for
  17577   Tue May 2 10:39:49 2023 JCConfigurationIMCBad Alignment It took a while, but I was finally able
to align IMC. It seems like WFS has been
getting really whacky lately when we arent
  17575   Mon May 1 16:51:20 2023 PacoSummaryASCIFO alignment in bad shape[Yuta, Mayank, JC, Paco]

We fixed the IFO nominal
  17574   Mon May 1 14:45:48 2023 MayankSummaryLSCAttenuated BHD DC Beam[Yuta, Mayank]

UPDATE: It turned out that the
pair of 0.3 OD ND filters we used were not
  17573   Mon May 1 08:57:45 2023 JCConfigurationIMCBad Alignment I had to realign the IMC today. When I
came in, it was very bad, not much flashing
at all, I had to do it from scratch. CH01
  17572   Fri Apr 28 20:56:06 2023 KojiSummaryASCIFO alignment in bad shapeI suppose ASS Y arm is using PR2/3 to align
the beam to the arm.
Can't we have ASS PRM bring the
  17571   Fri Apr 28 20:17:37 2023 yutaSummaryASCIFO alignment in bad shape[Mayank, Paco, Yuta]

IFO alignment is not good.
  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
  17568   Wed Apr 26 18:41:56 2023 PacoUpdateOPLEV TablesITMX oplev laser died[Paco, Koji, Mayank]

We replaced ITMX Oplev
  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
  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,
  17565   Wed Apr 26 11:27:49 2023 PacoSummaryBHDLO/MI(DARM) signal strength comparison between the configurations with finesseI'm
checking Koji + Yuta's not-so-naive calculations
using finesse. 
  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. 
  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.
  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
  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
  17560   Mon Apr 24 19:11:20 2023 KojiSummaryBHDLO/MI(DARM) signal strength comparison between the configurationsYuta and I had a discussion last week about
the signal strength between the configurations.
Here are some naive calculations.
  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.
  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
  17557   Fri Apr 21 19:07:07 2023 ranaConfigurationIOOback on RLthis afternoon I did some swapping around
of linear and RL for IMC WFS.

In the end, I left in in the 'both'
  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
  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
  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
  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
ELOG V3.1.3-