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ID Date Author Type Categoryup Subject Text Attachments
  16241   Thu Jul 8 11:20:38 2021 Anchal, Paco, GautamSummaryLSCPRFPMI locking attemptsLast night Gautam walked us through the
algorithm used to lock PRFPMI. We tried it
several times with the PSL HEPA filter off
  
  16247   Wed Jul 14 20:42:04 2021 gautamUpdateLSCLocking[paco, gautam]

we decided to give the PRFPMI lock
a go early-ish. Summary of findings today
  
  16248   Thu Jul 15 14:25:48 2021 PacoUpdateLSCCM board[gautam, paco]

We tested the CM board by implementing
the high bandwidth IR lock (single arm).
 high_BW_TFs.pdf 
  16251   Mon Jul 19 22:16:08 2021 pacoUpdateLSCPRFPMI locking[gautam, paco]

Gautam managed to lock PRFPMI a
little before ~ 22:00 local time. The ALS
  
  16261   Tue Jul 27 23:04:37 2021 AnchalUpdateLSC40 meter party[ian, anchal, paco]

After our second attempt of locking
PRFPMI tonight, we tried to resotre XARM
 Screenshot_2021-07-27_22-19-58.png 
  16264   Wed Jul 28 17:10:24 2021 AnchalUpdateLSCSchnupp asymmetry[Anchal, Paco]

I redid the measurement of Schnupp
asymmetry today and found it to be 3.8 cm
 Lsch.pdf 
  16275   Wed Aug 11 11:35:36 2021 PacoUpdateLSCPRMI MICH orthogonality plan[yehonathan, paco]

Yesterday we discussed a bit about
working on the PRMI sensing matrix.
  
  16303   Mon Aug 30 17:49:43 2021 PacoSummaryLSCXARM POX OLTFUsed diaggui to get OLTF in preparation
for optimal system identification / calibration.
The excitation was injected at the control
 XARM_POX_OLTF.pdfXARM_POX_Coh.pdf 
  16304   Tue Aug 31 14:55:24 2021 ranaSummaryLSCXARM POX OLTFthis model doesn't seem to include
the analog AA, analog AI, digital AA, digital
AI, or data transfer delays in the system.
  
  16320   Mon Sep 13 09:15:15 2021 PacoUpdateLSCMC unlocked?Came in at ~ 9 PT this morning to find
the IFO "down". The IMC had lost
its lock ~ 6 hours before, so at about 03:00
 VAC_2021-09-13_09-32-45.png 
  16322   Mon Sep 13 15:14:36 2021 AnchalUpdateLSCXend Green laser injection mirrors M1 and M2 not responsiveI was showing some green laser locking
to Tega, I noticed that changing the PZT
sliders of M1/M2 angular position on Xend
  
  16368   Thu Sep 30 14:13:18 2021 AnchalUpdateLSCHV supply to Xend Green laser injection mirrors M1 and M2 PZT restoredLate elog, original date Sep 15th

We found that the power switch
of HV supply that powers the PZT drivers
  
  16888   Fri Jun 3 15:22:51 2022 yutaUpdateLSCBoth arms locked with POY/POX, IR beam centered on TMs with ASS[JC, Paco, Yuta]

We locked both Y and X arms with POY11
 IRBeamsOnTMs.JPGScreenshot_2022-06-03_15-03-51.png 
  16889   Fri Jun 3 17:42:50 2022 yutaUpdateLSCMICH locks with AS55_QAS path at AP table as re-aligned and confirmed
that MICH can be locked with AS55 Q.
 Screenshot_2022-06-03_17-41-55.png 
  16890   Sun Jun 5 19:46:40 2022 PacoUpdateLSCFixed IMC Trans sum issue[Paco]

Fixed the issue below:

  
  16892   Mon Jun 6 13:35:11 2022 PacoUpdateLSCFirst calibrated spectra of MICH at AS55 Q[Paco, Yuta]

On the topic of high AS55_Q RFPD
offset, it seems it stems from a small residual
 Screenshot_2022-06-06_17-30-16_MICHOLTF.pngCalibrated_MICH_ERR.pdf 
  16929   Fri Jun 17 16:22:21 2022 yutaUpdateLSCActuator calibration of BS. ITMX, ITMY, updated MICH displacement spectra from c1calFollowing what we have done in 2013 (40m/8242),
actuator calibration was done using MICH.
 6x 
  16940   Wed Jun 22 18:55:31 2022 yutaUpdateLSCDaily alignment work; POY trouble solved[Koji, Yuta]

I found that Yarm cannot be locked
 Screenshot_2022-06-22_17-17-42_XYaligned.pngScreenshot_2022-06-22_18-58-26_Transmission.png 
  16941   Wed Jun 22 19:41:13 2022 KojiUpdateLSCDaily alignment work; POY trouble solvedBefore the final measurement of the DC
values for the transmissions, I aligned the
PMC. This made the PMC trans increased from
  
  16952   Mon Jun 27 18:54:27 2022 yutaUpdateLSCModulation depths measurement using Yarm cavity scan[Yehonathan, Yuta]
EDITED
by YM on 22:11 June 27, 2022 to correct for
 YarmModIndex.png 
  16968   Fri Jul 1 08:50:48 2022 yutaSummaryLSCFPMI with REFL/AS55 trial[Anchal, Paco, Yuta]

We tried to lock FPMI with REFL55
and AS55 this week, but no success yet.
  
  16977   Thu Jul 7 18:18:19 2022 yutaUpdateLSCActuator calibration of ETMX and ETMX(This is a
complete restore of elog 40m/16970
from July 5, 2022 at 14:34)
 Screenshot_2022-07-05_14-52-01_OLTF.pngScreenshot_2022-07-05_14-54-03_TF.pngScreenshot_2022-07-05_14-56-41_Ratio.png 
  16978   Thu Jul 7 18:22:12 2022 yutaUpdateLSCActuator calibration of MC2 using Yarm(This is also
a restore of elog 40m/16971
from Jul 5, 2022 at 17:36)
 TF.pngMC2.png 
  16981   Fri Jul 8 16:18:35 2022 ranaUpdateLSCActuator calibration of MC2 using Yarmalthough I know that Yuta knows this, I
will just put this here to be clear: the
NNN/f^2 calibration is only accurate abouve
  
  17002   Thu Jul 14 00:10:08 2022 yutaSummaryLSCFPMI with REFL/AS55 trial continued[Paco, Koji, Yuta]

We managed to lock MICH using REFL55_Q
by setting the demodulation phases and offsets
 AS55_I.pngAS55_Q.pngREFL55_I.pngREFL55_Q.png 
  17007   Fri Jul 15 19:13:22 2022 PacoSummaryLSCFPMI with REFL/AS55 demod phase adjust[Yuta, Paco]


We first zero the offsets
in ASDC, AS55, REFL55, POX11, and POY11 when
  
  17008   Fri Jul 15 22:36:04 2022 ranaSummaryLSCFPMI with REFL/AS55 demod phase adjustVery nice!   
  17012   Mon Jul 18 16:39:07 2022 PacoSummaryLSCFPMI locking procedure using REFL55 and AS55[Yuta, Paco]

In summary, we locked FPMI using
REFL55_I, REFL55_Q, and AS55_Q. The key to
 DARM_07_18_2022_FMPI.pdfCARM_07_18_2022_FPMI.pdfMICH_07_18_2022_FPMI.pdffpmi_darm_nb_2022_07.pdf 
  17014   Mon Jul 18 17:07:12 2022 yutaUpdateLSCx4.12 added to ETMX coil outputs to balance with ETMYTo balance the actuation on ETMX and ETMY,
x4.12
was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL
  
  17016   Mon Jul 18 21:41:42 2022 AnchalSummaryLSCFPMI locking procedure using REFL55 and AS55Now that you have found a working configuration,
I suggest we update CARM and DARM filter
banks so that they are used in locking those
  
  17069   Tue Aug 9 19:54:31 2022 yutaSummaryLSCFPMI locking tonight[Tega, Anchal, Yuta]

We resored FPMI locking settings.
  
  17089   Thu Aug 18 14:49:35 2022 YehonathanSummaryLSCFPMI Sensitivity{Yuta, Yehonathan}

We wrote a notebook found on Git/40m/measurements/LSC/FPMI/NoiseBudget/FPMISensitivity.ipynb
for calculating the MICH, DARM (currently
 Sensitivity_Plot_1344133503.pdf 
  17091   Thu Aug 18 18:10:49 2022 KojiSummaryLSCFPMI SensitivityThe overlapping plot of the calibrated
error and control signals gives you an approximately
good estimation of the freerun fluctuation,
  
  17122   Wed Aug 31 11:39:48 2022 YehonathanUpdateLSCUpdated XARM noise budget{Radhika, Paco, Yehonathan}

For educational purposes we update
the XARM noise budget and add the POX11 calibrated
 Screenshot_2022-08-31_11-38-46.png 
  17137   Thu Sep 8 16:03:25 2022 YehonathanUpdateLSCRealignment, arm locking, gains adjustments{Anchal, Yehonathan}

We came this morning and the IMC
was misaligned. The IMC was realigned and
  
  17141   Thu Sep 15 16:19:33 2022 YehonathanUpdateLSCPOX-POY noise budgetDoing POX-POY noise measurement as a poor
man's FPMI for diagnostic purposes. (Notebook
in /opt/rtcds/caltech/c1/Git/40m/measurements/LSC/POX-POY/Noise_Budget.ipynb)
 XARM_Actuation_Plot.pdfYARM_Actuation_Plot.pdfSensitivity_Plot_1347315385.pdf 
  17277   Thu Nov 17 11:24:39 2022 JCHowToLSCLocking MICH[Yuta, JC]

Here is the Yuta's Alignment
Scheme from elog
  
  17321   Tue Nov 29 11:38:37 2022 JCHowToLSCLock Single Arm After MICH lockI tried locking single arm this morning,
but I was unable to because the triggers
were set to lock strictly to MICH. Anchal
 Screen_Shot_2022-11-29_at_11.01.56_AM.png 
  17359   Wed Dec 14 17:01:39 2022 PacoSummaryLSCFPMI in the post-cds upgrade era[Paco, Anchal, Koji]

A possible long-hidden
bug of MC2 dewhitening switching was found
  
  17366   Tue Dec 20 09:20:18 2022 PacoSummaryLSCFPMI locked and cal [Anchal, Yuta, Paco]

Late elog (from yesterday) -- We
locked FPMI, YAUX, and turned on calibration
  
  17367   Tue Dec 20 18:27:14 2022 AnchalSummaryLSCFPMI locked, DARM calibration data taken, FPMI BHD locked![Anchal, Paco, Yuta]

FPMI
 PXL_20221221_013126861.MP.jpg 
  17369   Wed Dec 21 12:18:44 2022 PacoSummaryLSCFPMI locked, but FPMI BHD not locked[Yuta, Paco]

We tried restoring the FPMI BHD
readout from yesterday but 
 FPMI_calibrated_noise_20221221.pdf 
  17392   Wed Jan 11 16:56:57 2023 yutaSummaryLSCFPMI BHD recovered, LO phase noise not limiting the sensitivity[Paco, Yuta]

We recovered FPMI BHD, and sensitivity
 6x 
  17395   Thu Jan 12 12:00:09 2023 PacoSummaryLSCFPMI BHD sensitivity curve with higher resolution upto 6.9 kHzHere's the same sensitivity plot from
yesterday (40m/17392),
but with higher frequency resolution, upto
 FPMI_calibrated_noise_20230112.pdfFPMI_calibrated_noise_20230112_HF.pdf 
  17399   Fri Jan 13 14:20:34 2023 yutaSummaryLSCCalibration friendly FPMI BHD[Paco, Yuta]

Gains in DARM are corrected to make
 Screenshot_2023-01-13_14-55-34.pngFPMI_calibrated_noise_20230113.pdf 
  17400   Fri Jan 13 18:54:59 2023 yutaSummaryLSCInvestigations of LO phase locking in FPMI BHD[Paco, Yuta]

After several hours of unattended
 Screenshot_2023-01-13_18-41-48_SensMat_FPMIBHD.pngBHD_DARM_Sensors_20230113.pdfFPMI_calibrated_noise_20230113_LO1vsAS4.pdf 
  17428   Thu Jan 26 23:33:19 2023 KojiUpdateLSCEP30-2 Epoxy bonding for Yuta@OMC Lab
EP30-2 Epoxy bonding of V beam dumps
for LSC PDs.
 PXL_20230127_053113856.jpgPXL_20230127_053145432.jpg 
  17135   Thu Sep 8 11:54:37 2022 JCConfigurationLab OrganizationLab OrganizationThe arms in the 40m laboratory have now
been sectioned off. Each arm has been divided
up into 15 sections. Along the Y arm, the
 1A7026BC-82A9-49E9-BA22-1A700DFEC5D2.jpeg2A904809-82F0-40C0-B907-B48C3A0E789E.jpegCB4B8591-B769-454D-9A16-EE9176004099.jpeg 
  17136   Thu Sep 8 12:01:02 2022 JCConfigurationLab OrganizationLab OrganizationThe floor cable cover has been changed
out for a new one. This is in Section X11.
 F41AD1DA-29E9-4449-99CB-5F43AE527CA6_1_105_c.jpegFF5F2CE8-85E8-4B6F-8F8A-9045D978F670.jpeg 
  17187   Thu Oct 13 14:46:34 2022 JCUpdateLab OrganizationLab Cleanup 10/12/2022During Wednesday’s lab clean up,
we made a ton of progress in organization.
Our main focus was to tackle CDS debris from
 IMG_6356.JPGIMG_6358.JPG 
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