40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 344 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  17273   Wed Nov 16 15:09:08 2022 yutaUpdateBHDBHD fringe contrast measured with unwhitening filtersBHD fringe visibility was measured again
with unwhitening filters on on BHDC_A and
B, which removed signal leakage to zero (
 ContrastMeasurements20221116_edited.pdf 
  17283   Fri Nov 18 09:00:27 2022 JCUpdateVACPressure Gauge InformationI bought the spare Full-Range Pirani Gauge
a while ago and realized that I never logged
this. The Pirani Gauges we are using is described
  
  17286   Fri Nov 18 17:00:15 2022 AnchalUpdateSUSMC1 and MC3 OSEMs calibrated using MC_FAfter the MC1 osem dewhitening was fixed,
I did the calibration of MC1 OSEM signals
using MC_F using this notebook.
  
  17288   Fri Nov 18 23:21:54 2022 ranaUpdateASCIMC WFS ongoingOn Wednesday, I did some rework of the
MC WFS gains. I think it should still work
as before as long as the overall input gain
  
  17289   Sun Nov 20 13:42:21 2022 AnchalUpdateSUSIMC testI repeated this test for the following
configuration:


PSL shutter closed at good
  
  17290   Mon Nov 21 09:13:31 2022 JCUpdatePSLPMC input beam aligned again, IMC [JC, Paco]

I attempted to align PMC Beam from
a transmission of 0.72. I failed to do so
  
  17293   Mon Nov 21 15:16:12 2022 TegaUpdateCDSworkstation upgradeWe are currently working on donatella workstation
upgrade, which we are calling donatellaclone
for now. After installing Debian 11, we install
  
  17295   Mon Nov 21 18:33:05 2022 AnchalUpdateSUSMC2 OSEMs calibrated using MC_FRepeated this for MC2 using the error measurement
technique mentioned in 40m/17286
using this notebook.
  
  17296   Mon Nov 21 18:43:46 2022 yutaUpdateBHDc1hpc and c1lsc modified to send BHD_DIFF and BHD_SUM[Anchal, Yuta]

To send BHD signals from c1hpc after
 Screenshot_2022-11-21_18-42-49_BHD.png 
  17297   Tue Nov 22 08:56:27 2022 JCUpdatePSLPMC input beam alignment[Paco, Anchal, JC]

C1:PSL-PMC_PMCTRANSPD ~ 0.715 this
morning, this was increased to ~0.730. There
 Screenshot_from_2022-11-22_08-58-45.png 
  17299   Tue Nov 22 15:33:02 2022 TegaUpdateCDSI/O chassis parts inventory[Tega, JC]

We received the following I/O chassis
parts from LLO:
  
  17300   Tue Nov 22 20:46:11 2022 RadhikaUpdateALSXARM green laser lock debugging[Paco, Anchal, Radhika]

We tried to debug why the XARM
green laser isn't catching lock with
  
  17301   Wed Nov 23 11:06:08 2022 AnchalUpdateBHDc1hpc and c1sus modified to add BS dither and demodulation optionc1hpc has option of dithering BS now (sending
excitation to BS LSC port to c1sus over IPC).
This is available for demodulating BHDC and
  
  17302   Wed Nov 23 12:58:33 2022 YehonathanUpdateBHDSome more calculationsChanged the BHD BS transmissivity to 0.56.

Demodulation Phases

As was noted before. The LO phase
 LO_phase_sens_vs_LO_phase_RF.pdfLO_phase_sens_vs_LO_phase_RF_fixed_demod.pdfLO_phase_sens_vs_MICH_Offset.pdf 
  17304   Wed Nov 23 16:12:00 2022 TegaUpdateCDSI/O chassis parts inventory II[Tega, JC]

We picked up the following I/O
chassis components from Downs CDS testing
  
  17305   Wed Nov 23 16:34:33 2022 KojiUpdateCDSNew donatella testingLet's use this entry to list of the
test results of new donatella.


Firefox
  
  17306   Wed Nov 23 17:12:34 2022 RadhikaUpdateALSXARM green laser lock debuggingI tested the mixer by feeding it a 300
kHz signal sourced from a Moku:Go. I kept
the LO input the same - 231.25 kHz from
  
  17307   Wed Nov 23 17:21:44 2022 JCUpdateVACInterlocks may have been tripped due to N2 pressure loss[Paco, JC]

While changing out one of the N2
tanks today, one of the fitting stripped.
 Screen_Shot_2022-11-23_at_5.22.57_PM.pngScreen_Shot_2022-11-23_at_5.23.09_PM.png 
  17308   Wed Nov 23 17:28:39 2022 YehonathanUpdateBHDSome more calculationsFields at the BHD BS. More on this later.  Fields_at_BHDBS.pdf 
  17310   Thu Nov 24 11:23:35 2022 AnchalUpdateSUSLow noise stateI've turned off HEPA fan and all lights
at
PST: 2022-11-24 11:23:59.509949 PST
  
  17311   Thu Nov 24 15:37:45 2022 AnchalUpdateASCIMC WFS output matrix diagonalization effortI tried following the steps and the method
I was using converged to same output matrix
upto 2 decimal points but there is still
 WFS_Step_DCResponses_Offsets_Marked.png 
  17312   Fri Nov 25 12:15:46 2022 AnchalUpdateVACVacuum Gate valves restoredI came today to find that PSL shutter was
closed. I orginially thought some shimmer
obersvations are underway in the quiet state.
 Screenshot_2022-11-25_12-29-23.png 
  17313   Fri Nov 25 15:35:23 2022 AnchalUpdateSUSLow noise stateTurned off HEPA at:

PST: 2022-11-25 15:34:55.683645
PST
  
  17314   Sun Nov 27 15:30:22 2022 ChrisUpdateOptimal ControlIMC alignment controller testingFive more mode cleaner alignment controllers
were tested this morning (remotely). These
were designed to run in tandem with the standard
  
  17315   Mon Nov 28 11:15:23 2022 AnchalUpdateCDSFront ends DAC Kill (DK) got activated; restored FEs[Anchal, Paco, Yehonathan, JC]

Last night at 9:15 pm PST (Nov
27th, 2022) some kind of disruption happened
 FE_State_Word_Changes.png 
  17316   Mon Nov 28 11:21:25 2022 JCUpdatePSLPMC input beam alignmentC1:PSL-PMC_PMCTRANSPD was increased from
0.72 to 0.731
 Screenshot_from_2022-11-28_11-20-31.png 
  17318   Mon Nov 28 16:58:20 2022 PacoUpdateCDSpypi package added[Paco, Tega]

I added the pypi package "restoreEpics"
  
  17320   Mon Nov 28 20:14:27 2022 AnchalUpdateASCAS WFS proposed path to IMC WFS headsIn Attachment 1, I give a plan for the
proposed path of AS beam into the IMC WFS
heads to use them temporarily as AS WFS.
 F5B115E5-885F-463C-9645-BB2EB73B6144_1_201_a.jpeg 
  17322   Tue Nov 29 15:32:32 2022 AnchalUpdateBHDc1hpc model updates to support double audio ditherMany changes have been done to c1hpc to
support dual demodulation at audio frequencies.
We moved away with ASS style of lockin setup
 Screenshot_2022-11-29_15-36-05.png 
  17325   Wed Nov 30 14:25:34 2022 TegaUpdateCDSAMD display driver installationAfter swapping out the HDD on donatella,
I noticed that the display resolution was
stuck on 700x400 and could not be changed.
  
  17326   Wed Nov 30 18:27:07 2022 PacoUpdateGeneralMaking the Jenne laser great again[Paco]

I picked up the 950 nm laser that
Koji tested before and restored the Jenne
 PXL_20221201_004623398.jpgPXL_20221201_015752792.jpg 
  17330   Fri Dec 2 15:59:55 2022 RadhikaUpdateALSXARM green laser lock debuggingI took a transfer function measurement
of the XEND PDH servo box, from servo input
to piezo output [Attachment 1]. The servo
 XEND_green_pdhservo_TF.pdfG1_PDHbox_TF.png 
  17331   Sat Dec 3 10:13:56 2022 AnchalUpdateSUSLow noise stateI've turned off HEPA fan and all lights
at:

PST: 2022-12-03 10:13:03.184705
  
  17332   Sat Dec 3 17:42:25 2022 AnchalUpdateASCIMC WFS Fixed for nowToday I did a lot of steps to eventually
reach to WFS locking stably for long times
and improving and keeping the IMC transmission
 IMC_WFS_OLTF.pdf 
  17333   Sun Dec 4 10:03:02 2022 ChrisUpdateOptimal ControlIMC alignment controller testingAnother five
mode cleaner alignment controllers were tested
last night (remotely), running in tandem
  
  17334   Sun Dec 4 16:44:04 2022 AnchalUpdateASCIMC WFS Fixed for nowToday, I worked on WFS loop output matrix
for PIT DOFs.


I began with the matrix
 IMC_WFS_OLTF_All_Gains_1.pdfIMC_WFS_OLTF_Nom_Gain.pdfWFS_Loop_Configuration.pngWFS_Loop_Performance.png 
  17335   Mon Dec 5 12:05:29 2022 AnchalUpdateCDSc1sus2 all FE models crashed spontaneouslyJust a few minutes ago, all models on FE
c1sus2 crashed. I'm attaching some important
files that can be helpful in investigating
 c1sus2Failed.txtc1sus2Failed.png 
  17336   Mon Dec 5 16:24:45 2022 AnchalUpdateASCIMC WFS servo diagnosis Also reply to: 40m/17255


I ran the toggleWFSoffsets.py
script to generate a step response of the
 IMC_WFS_Step_Response.pdf 
  17337   Mon Dec 5 20:02:06 2022 AnchalUpdateASCIMC WFS heads electronic feasibility test for using for Arm ASCI took transfer function measurement of
WFS2 SEG4 photodiode between 1 MHz to 100
MHz in a linear sweep.
 20221205_193105_WFS2_SEG4_RF_TF_Screenshot.pngPXL_20221206_033419110.jpg 
  17338   Tue Dec 6 09:39:22 2022 yehonathanUpdateCDSAnother CDS crashAround 9:30 we noticed IMC going out of
lock with MC1 swinging hard. It seems like
the coil output shut down.
  
  17339   Tue Dec 6 13:09:44 2022 yutaUpdateBHDc1cal model updates to support sensing matrix for BHD[Anchal, Yuta]

We have modified c1cal model to support
 Screenshot_2022-12-06_13-02-05_c1calMEDM.pngScreenshot_2022-12-06_13-06-35_c1lsc.pngScreenshot_2022-12-06_13-07-14_c1cal.pngScreenshot_2022-12-06_13-07-50_c1caldemod.png 
  17340   Tue Dec 6 15:29:35 2022 RadhikaUpdateALSXARM green laser lock debugging[Radhika, JC]

We retook transfer function measurements
of the XEND PDH servo box, this time setting
 XEND_PDH_servo_TF_boost_on_off.pdf 
  17341   Tue Dec 6 15:59:46 2022 RadhikaUpdateALSXARM green laser lock debugging[Radhika, Paco]

Paco suggested that alignment could
still be the primary reason why the XEND
  
  17342   Tue Dec 6 16:52:26 2022 AnchalUpdateASCIMC WFS heads electronic feasibility test for using for Arm ASCI tested teh WFS demod board for possibility
of demodulating 11 MHz or 55 MHz signal with
it. It definitely has some bandpass filter
 WFS1_SEG2_DEMOD_Test.pdf11MHz.png29.5MHz.png55MHz.png 
  17344   Tue Dec 6 17:40:13 2022 KojiUpdateASCIMC WFS heads electronic feasibility test for using for Arm ASCWe have spare WFS demods in a plastic box
along the Y arm. So you don't need to
modify the IMC demod boards, which we want
  
  17348   Thu Dec 8 20:40:14 2022 AnchalUpdateASCWFS demodulation board modification attemptBased on the previous two elog posts, Koji
and I decided that we should use 11 MHz signal
for arm cavity ASC and modify a spare WFS
 PXL_20221209_035720569.jpgPXL_20221209_035729233.jpg 
  17350   Fri Dec 9 10:08:54 2022 RadhikaUpdateASCYEND green alignment chroniclesToday I set out to align and lock the
YEND green laser, and observe the expected
PDH error signal and PZT control signal. 
 IMG_3982.jpg 
  17353   Fri Dec 9 17:42:04 2022 KojiUpdateCDSNew donatella issues
MEDM video switches didn't
work - "sh: 1: /opt/rtcds/caltech/c1/scripts/general/videoscripts/videoswitch3:
not found"


This was
  
  17355   Fri Dec 9 21:54:40 2022 RadhikaUpdateASCMoku digital filter for low-frequency resonances (ALS/calibration)[Radhika, Paco]

I modeled a digital filter for
adding a resonance at a desired frequency,
  
ELOG V3.1.3-