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ID Datedown Author Type Category Subject Text Attachments
  17180   Mon Oct 10 00:05:24 2022 ChrisUpdateIOOIMC WFS / MC2 SUS glitchThanks for pointing out that EPICS data
collection (slow channels) was not working.
I started the service that collects these
  
  17179   Sun Oct 9 13:49:49 2022 KojiUpdateIOOIMC WFS / MC2 SUS glitchThe IMC and the IMC WFS kept running for
~2days. 👍

I wanted to look at the trand of
 Screen_Shot_2022-10-09_at_13.49.12.png 
  17178   Fri Oct 7 22:45:15 2022 AnchalUpdateCDSCDS Upgrade Status Update[Chris, Anchal, JC, Paco, Yuta]




  
  17177   Fri Oct 7 20:00:46 2022 KojiUpdateIOOIMC WFS / MC2 SUS glitchAfter the CDS upgrade team called for a
day (their work TBD), I took over the locked
IMC to check how it looked like.
 Screenshot_2022-10-07_19-59-45.png 
  17176   Thu Oct 6 18:50:57 2022 AnchalSummaryBHDBH55 meas diff angle estimation and LO phase lock attempts[Yuta, Paco, Anchal]

BH55 meas diff

We
estimated meas diff angle for BH55 today
  
  17175   Thu Oct 6 12:02:21 2022 AnchalUpdateCDSCDS Upgrade Plan[Chris, Anchal]

Chris and I discussed our plan
for CDS upgrade which amounts to moving new
  
  17174   Thu Oct 6 11:12:14 2022 AnchalUpdateBHDBH55 RFPD installation complete[Yuta, Paco, Anchal]

BH55 RFPD installation was still
not complete until yesterday because of a
  
  17173   Thu Oct 6 07:29:30 2022 ChrisUpdateComputersSuccessful takeover attempt with the new front ends[JC, Chris]

Last night’s CDS
upgrade attempt succeeded in taking over
  
  17172   Tue Oct 4 21:00:49 2022 ChrisUpdateComputersFailed takeover attempt with the new front ends[Jamie, JC, Chris]

Today we made a failed attempt
to take over the 40m hardware with the new
  
  17171   Mon Oct 3 15:19:05 2022 PacoUpdateBHDLO phase noise and control after violin mode filters[Anchal, Paco]

We started the day by taking a
spectrum of C1:HPC-LO_PHASE_IN1,
 filters_c1sus_lo1_lsc.pngBHDC_asd_act.pngboosted_lo_phase_control.png 
  17170   Mon Oct 3 13:11:22 2022 YehonathanUpdateBHDSome comparison of LO phase lock schemesI pushed a notebook and a Finesse model
for comparing different LO phase locking
schemes. Notebook is on https://git.ligo.org/40m/bhd/-/blob/master/controls/compare_LO_phase_locking_schemes.ipynb,
 MICH_sens_vs_LO_phase.pdfLO_phase_sens_vs_LO_phase_RF.pdfLO_phase_sens_vs_LO_phase_double_audio.pdf 
  17169   Mon Oct 3 08:35:59 2022 TegaUpdateIMCAdding IMC channels to frames for NN test[Rana]

For the upcoming NN test on the
IMC, we need to add some more channels to
 Screen_Shot_2022-09-30_at_9.52.39_AM.png 
  17168   Sat Oct 1 13:09:49 2022 AnchalUpdateIMCWFS turned onI turned on WFS on IMC at:

PDT: 2022-10-01 13:09:18.378404
PDT
  
  17167   Fri Sep 30 20:18:55 2022 PacoUpdateBHDLO phase noise with different actuation points[Paco, Koji]

We took lo phase noise spectra
actuating on the for different optics-- LO1,
 BHDC_asd_actuation_point.png 
  17166   Fri Sep 30 18:30:12 2022 AnchalUpdateASSModel ChangesI updated c1ass model today to use PR2
PR3 instead of TT1 TT2 for YARM ASS. This
required changes in c1su2 too. I have split
  
  17165   Thu Sep 29 18:01:14 2022 AnchalUpdateBHDBH55 LSC Model Updates - part IVMore model changes

c1lsc:


BH55_I and BH55_Q are now
being read at ADC_0_14 and ADC_0_15. The
  
  17164   Thu Sep 29 15:12:02 2022 JCUpdateComputersSetup the 6 new front-ends to boot off the FB1 clone[Jamie, Christopher, JC]

This morning we decided to label
the the fiber optic cables. While doing this,
  
  17163   Wed Sep 28 21:54:08 2022 PacoUpdateBHDcalibrated LO phase noise; updateRepeated the LO phase noise measurement,
this time with the LO - ITMY single
bounce, and a couple of fixes Koji
 dcpd_phase_asd.pdflo_phase_asd.pdf 
  17162   Wed Sep 28 19:15:56 2022 KojiUpdateGeneralTesting 950nm laser found in trash pileI don't know what was wrong with the
past setup but the 950nm laser (QPHOTONICS
QFLD-950-3S) just worked fine up to ~300MHz
 PXL_20220929_013850989.MP.jpgPXL_20220929_013859439.jpgPXL_20220929_013911125.jpg 
  17161   Wed Sep 28 16:37:26 2022 PacoUpdateBHDcalibrated LO phase noise; update[yuta, paco]

Update; the high frequency ( >
100 Hz) drop is of course not real and comes
 lo_phase_asd.pdf 
  17160   Tue Sep 27 10:50:11 2022 PacoUpdateBHDcalibrated LO phase noiseLocked LO phase to ITMX single bounce beam
at the AS port, using the DCPD (A-B) error
point and actuating on LO1 POS. For this
 lo_phase_asd.pdf 
  17159   Mon Sep 26 11:39:37 2022 PacoUpdateBHDBH55 RFPD installed - part II[Paco, Anchal]

We followed rana's suggestion
for stress relief on the SMA joint in the
 PXL_20220926_175010061.MOTION.jpgBH55_Transimpedance_Measurement.pdf 
  17158   Fri Sep 23 19:07:03 2022 TegaUpdateComputersWork to improve stability of 40m models running on teststand [Chris, Tega]

Timing glitch investigation:


Moved dolphin
 dolphin_state_all_green.pngdolphin_state_IPC_glitch.png 
  17157   Fri Sep 23 19:04:12 2022 AnchalUpdateBHDBH55 LSC Model Updates - part IIIBH55

I further
updated LSC model today with following changes:


BH55 whitening switch binary
  
  17156   Fri Sep 23 18:31:46 2022 ranaUpdateBHDBH55 RFPD installed - part IA design flaw in these initial LIGO RFPDs
is that the SMA connector is not strain releieved
by mounting to the case. Since it is only
  
  17155   Fri Sep 23 14:10:19 2022 RadhikaUpdateBHDBH55 RFPD installed - part I[Radhika, Paco, Anchal]

I placed a lens in the B-beam
path to focus the beam spot onto the RFPD
 IMG_3766.jpegIMG_3770.jpegIMG_3773.jpeg 
  17154   Fri Sep 23 10:05:38 2022 JCUpdateVACN2 Interlocks triggered [Chub, Anchal, Tega, JC]

After replacing an empty tank this
morning, I heard a hissing sound coming from
 Screenshot_2022-09-23_10-19-39.pngScreenshot_2022-09-23_10-22-45.png 
  17153   Thu Sep 22 20:57:16 2022 TegaUpdateComputersbuild, install and start 40m models on teststand [Tega, Chris]

We built, installed and started
all the 40m models on the teststand today.
 dolphin_state_plus_c1shimmer.pngFE_status_overview.png 
  17152   Thu Sep 22 19:51:58 2022 AnchalUpdateBHDBH55 LSC Model Updates - part III updated follwoing in teh rtcds models
and medm screens:


c1lsc

Added
  
  17151   Wed Sep 21 17:16:14 2022 TegaUpdateComputersSetup the 6 new front-ends to boot off the FB1 clone[Tega, JC]

We laid 4 out of 6 fiber cables
today. The remaining 2 cables are for the
  
  17150   Wed Sep 21 17:01:59 2022 PacoUpdateBHDBH55 RFPD installed - part I[Radhika, Paco]

Optical path setup

We
realized the DCPD - B beam path was already
 IMG_3760.jpegIMG_3764.jpeg 
  17149   Wed Sep 21 10:10:22 2022 YehonathanUpdateCDSC1SU2 crashed{Yehonathan, Anchal}

Came this morning to find that
all the BHD optics watchdogs tripped. Watchdogs
  
  17148   Tue Sep 20 23:06:23 2022 TegaUpdateComputersSetup the 6 new front-ends to boot off the FB1 clone[Tega, Radhika, JC]

We wired the front-ends for power,
DAQ and martian network connections. Then
 IMG_20220921_084220465.jpgdolphin_err_init_state.pngdolphin_final_state.png 
  17147   Tue Sep 20 18:18:07 2022 AnchalSummarySUSETMX, ETMY damping loop gain tuning[Paco, Anchal]

We performed local damping loop
tuning for ETMs today to ensure all damping
  
  17146   Tue Sep 20 15:40:07 2022 yehonathanUpdateBHDTrying doing AC lockWe resume the LO phase locking work. MICH
was locked with an offset of 80 cts. LO and
AS beams were aligned to maximize the BHD
 Screenshot_2022-09-20_15-38-44.png 
  17145   Tue Sep 20 07:03:04 2022 PacoSummaryGeneralPower Outage 220916 -- restored all[JC, Tega, Paco ]

I would like to mention that during
the Vacuum startup, after the AUX pump was
  
  17144   Mon Sep 19 20:21:06 2022 TegaUpdateComputers1X7 and 1X6 work[Tega, Paco, JC]


We moved the GPS network time server
 IMG_20220919_204013819.jpgIMG_20220919_203541114.jpgIMG_20220919_203458952.jpg 
  17143   Mon Sep 19 17:02:57 2022 PacoSummaryGeneralPower Outage 220916 -- restored allRestore lab

[Paco, Tega, JC,
Yehonathan]

We followed the instructions 
  
  17142   Thu Sep 15 21:12:53 2022 PacoUpdateBHDLO phase "dc" controlLocked the LO phase with a MICH offset=+91.
The LO is midfringe (locked using the A-B
zero crossing), so it's far from being
 lophase_oltf.pdflophase_noise_spectra.pdf 
  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 
  17140   Thu Sep 15 11:13:32 2022 AnchalSummaryASSYARM and XARM ASS restoredWith limited proof of working for a few
times (but robustly), I'm happy to report
that ASS on YARM and XARM is working now.
  
  17139   Wed Sep 14 15:40:51 2022 JCUpdateTreasurePlastic ContainersThere are brand new empty plastic containers
located inside the shed that is outside
in the cage. These can be used for organizing
 B0DD2BEC-E57E-4AA2-8672-2ABB41F44F84.jpeg 
  17138   Tue Sep 13 14:12:03 2022 YehonathanUpdateBHDTrying LO phase locking again[Paco, Yehonathan]

Summary: 
We
 Screenshot_2022-09-13_17-41-33.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
  
  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 
  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 
  17134   Wed Sep 7 14:32:15 2022 AnchalUpdateSUSUpdated SD coil gain to keep all coil actuation signals digitally same magnitudeThe coil driver actuation strength for
face coils was increased by 13 times in LO1,
LO2, SR2, AS1, AS4, PR2, and PR3.
  
  17133   Tue Sep 6 17:39:40 2022 PacoUpdateSUSLO1 LO2 AS1 AS4 damping loop step responsesI tuned the local damping gains for LO1,
LO2, AS1, and AS4 by looking at step responses
in the DOF basis (i.e. POS, PIT, YAW, and
 LO1_Step_Response_Test_2022-09-06_17-19.pdfLO2_Step_Response_Test_2022-09-06_17-30.pdfAS1_Step_Response_Test_2022-09-06_17-53.pdfAS4_Step_Response_Test_2022-09-06_18-16.pdf 
  17132   Tue Sep 6 09:57:26 2022 JCSummaryGeneralLab cleaningDB9 Cables have been assorted and placed
behind the Y-Arm. Long BNC Cables and Ethernet
Cables have been stored under the Y-Arm. 
 982146B2-02E5-4C19-B137-E7CC598C262F.jpeg0FBB61AC-E882-458D-A891-7B11F35588FF.jpeg 
  17131   Fri Sep 2 15:40:25 2022 AnchalSummaryALSDFD cable measurements[Anchal, Yehonathan]

I laid down another temporary cable
from Xend to 1Y2 (LSC rack) for also measuring
 ICableOpenEnd_2022-09-02_3_08_34_PM.pngICableShortedEnd_2022-09-02_3_04_43_PM.pngQCableOpenEnd_2022-09-02_3_09_49_PM.pngQCableShortedEnd_2022-09-02_3_00_55_PM.pngDFD_Delay_Measurement.pdf 
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