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  40m Log, Page 31 of 344  Not logged in ELOG logo
ID Date Author Type Category Subjectup Text Attachments
  402   Tue Mar 25 15:56:09 2008 JohnUpdateTreasureAssorted picturesSome pictures scavenged from the D40.  D40.pdf 
  15380   Mon Jun 8 11:50:02 2020 HangUpdateBHDAstigmatism and scattering plotsWe consider the astigmatism effects of
the stock options. The conclusions are:

1. For the AS path, the stock should work
 6x 
  15381   Mon Jun 8 12:49:07 2020 KojiUpdateBHDAstigmatism and scattering plotsCan you describe the mode matching 
in terms of the total MM? Is MM_total = sqrt(MM_vert
* MM_horiz)?
  
  15382   Mon Jun 8 17:40:22 2020 JonUpdateBHDAstigmatism and scattering plotsMM_total = (MM_vert + MM_horiz) / 2. 

The large astigmatic MM loss in
the LO case is mainly due to the strong LO4
 LOpathStock2.pdf 
  15384   Mon Jun 8 21:45:47 2020 JonUpdateBHDAstigmatism and scattering plotsHmm? T1300364
suggests MM_total = Sqrt(MM_Vert * MM_Horiz)
  
  15387   Tue Jun 9 15:02:56 2020 eHangUpdateBHDAstigmatism and scattering plotsUsing the updated AOI's for the LO
path: (4.8, 47.9, 2.9, 4.5) deg for (LO1,
LO2, LO3, LO4), we obtain the following results. 
 LO_MM_t_scat_stock.pdfLO_MM_s_scat_stock.pdfLO_MM_adj_stock.pdf 
  4729   Tue May 17 01:05:56 2011 kiwamuUpdateLSCAsymmetry measurement prep : recentering worksI
re-centered beams on several PDs and a camera
including :
  
  9774   Wed Apr 2 01:18:30 2014 JenneUpdateLSCAttempt at PRMI+2 armsI was trying to lock PRMI+2 arms, but I'm
losing patience with the MC losing lock. 
It's mostly well-behaved, but every now and
  
  9780   Thu Apr 3 00:30:52 2014 JenneUpdateLSCAttempt at PRMI+2 arms[EricQ, Jenne]
We started out this evening by
locking the PRMI, on different REFL PDs,
  
  9781   Thu Apr 3 03:06:34 2014 JenneUpdateLSCAttempt at PRMI+2 arms[EricQ, Jenne]
Much more success later! 
We've had the arms locked on ALS
  
  9783   Thu Apr 3 18:09:54 2014 ericqUpdateLSCAttempt at PRMI+2 armsSo, here's the basic: "We reduced
the CARM offset and saw more TRY" plot. 
 offsetTRY.pdf2dhist.pdfpdh_trans.pdf 
  6736   Fri Jun 1 02:13:00 2012 JenneUpdateGreen LockingAttempt at Ygreen beat - failed[Yuta, Jenne]
We tried to find the Ygreen beat
note, with no success yet.  We calculate
  
  9821   Thu Apr 17 01:18:34 2014 JenneUpdateLSCAttempt at handing CARM to REFL11[Jenne, Koji]
This evening, Koji and I followed
the procedure from last night (elog
  
  9829   Fri Apr 18 12:53:54 2014 JenneUpdateLSCAttempt at handing CARM to REFL11: Time seriesSome time series data from Wednesday
night. 
Here is the first time we've gotten
 CARMin1_POPDC_TRX_1000sec_TRXwas1ct.pnglockloss_CARMoscillating.pnglockloss_CARMoscillating_2.png 
  897   Fri Aug 29 11:01:49 2008 josephbConfigurationComputersAttempt to change a channel gain in ICS-110BAs noted earlier by Rana, I was playing around
with the /cvs/cds/caltech/chans/daq/C1IOOF.ini
file with help from Rob.  I had made a backup
  
  8654   Thu May 30 10:40:59 2013 JamieConfigurationCDSAttempt to cleanup c1ioo ADC connectionsI have attempted to reconcile all of the
ADC connections to c1ioo.  Upon close
inspection, it appears that there was a lot
  
  922   Thu Sep 4 11:33:25 2008 josephb, Eric, JenneConfigurationComputersAttempt to increase gain for C1:PSL-ISS_INMONPD_F via 110BWe were attempting to increase the gain on
the channel C1:PSL-ISS_INMONPD_F in preparation
to do a scan of the PMC at very low input
  
  925   Thu Sep 4 16:24:56 2008 ranaConfigurationComputersAttempt to increase gain for C1:PSL-ISS_INMONPD_F via 110B[quote]We were attempting to increase the
gain on the channel C1:PSL-ISS_INMONPD_F
in preparation to do a scan of the PMC at
  
  11394   Tue Jul 7 23:26:19 2015 KojiUpdateCDSAttempt to list CDS issuesAs Jamie succeded to realize somewhat workable
condition of the 40m CDS, I tried to list
the obvious CDS issues so that we can attack
 burt.log.zip 
  9740   Wed Mar 19 21:37:45 2014 manasaSummaryLSCAttempt to lock PRMIsb with REFL165I&QI tried to
repeat Koji's PRMI lock using REFL165I/Q.
I was not able to lock PRMI stably. All I
  
  1035   Wed Oct 8 21:26:20 2008 YoichiUpdatePSLAttempt to replace the DC-DC converter (aborted)Rich, Steve, Yoichi

We opened the MOPA box and inspected our
 DCDC.JPGNPRO.JPG 
  14093   Fri Jul 20 22:53:15 2018 KojiUpdateASSAttempt to resurrect Yarm ASS [Koji Gautam]

We managed to realize stable
ASS configuration for Yarm. The transmission
 02.png 
  13040   Mon Jun 5 12:27:34 2017 jigyasaUpdateCamerasAttempt to run camera server Python codeWhile attempting
to execute the Python/Pylon code for the
camera server, camera_server.py, the compiler
  
  13041   Mon Jun 5 12:50:42 2017 jigyasaUpdateCamerasAttempt to run camera server Python codeI think there
might be a problem with the fact that
the installation of the various components
  
  13042   Mon Jun 5 15:04:33 2017 ranaUpdateCamerasAttempt to run camera server Python codeRight - we want to be compatible with new
version of the code, so instead of moving
the files to where the code wants them you
  
  13043   Mon Jun 5 18:40:12 2017 jigyasaUpdateCamerasAttempt to run camera server Python code[Gautam, Jigyasa]

This
evening, Gautam helped me resolve the
  
  11219   Wed Apr 15 02:26:41 2015 ericqUpdateLSCAttempted DRMI + ALS armsI spent some time tonight trying to revive
DRMI locking, with the arms held off on ALS. Not
much news, I haven't been able to get
  
  16577   Tue Jan 11 18:18:29 2022 AnchalSummaryBHDAttempted OSEM installation on AS1[Anchal, Paco, Yehonathan]

Connected in-cir cable to new flange
on ITMY Chamber
  
  8266   Mon Mar 11 10:20:36 2013 Max HortonSummaryComputersAttempted Smart UPS 2200 Battery ReplacementAttempted Battery Replacement on Backup
Power Supply in the Control Room: 
I tried to replace the batteries
 upsB.jpgupsBa.jpg 
  2517   Fri Jan 15 18:53:05 2010 josephb,peter,kojiUpdateComputersAttempted locking with Megatron replacing ETMY front endThis afternoon we attempted to lock the
interferometer using Megatron insteady of
the usual ETMY front end.
  
  12956   Fri Apr 28 18:01:56 2017 rebeccaUpdateCamerasAttempting to Load Camera ClientUsing /ligo/apps/linux-x86-64/camera/bin/camera_client.py
-c  /opt/rtcds/caltech/c1/scripts/GigE/SnapPy/L1-CAM-MC1.ini,
the Python script was able to run without
  
  12958   Fri Apr 28 22:50:35 2017 johannesUpdateCamerasAttempting to Load Camera ClientYou'll likely have to run camera_server.py
using the same ini file first before you
can use the client. Since the pylon installation
  
  12959   Sun Apr 30 13:24:00 2017 ranaUpdateCamerasAttempting to Load Camera ClientWe ought to put the camera software on
the shared disk; I don't think there's
any speed reasons that it needs to be local.
  
  2054   Mon Oct 5 18:34:26 2009 JenneUpdateAdaptive FilteringAttempts to take a TF of the OAF system[Jenne, Sanjit]
As per Matt's instructions in his
OAF document (elog
 OAF_TF_CORRexc_EMPHout_2.png 
  2058   Tue Oct 6 11:13:53 2009 JenneUpdateAdaptive FilteringAttempts to take a TF of the OAF system

    
        
  
  2061   Wed Oct 7 03:49:49 2009 ranaUpdateAdaptive FilteringAttempts to take a TF of the OAF system Here's a plot of the spectra of the
seismometers and MCL. The coherence shows
which axes are aligned right now: MC1_X is
 Untitled.png 
  2063   Wed Oct 7 07:42:55 2009 ranaUpdateAdaptive FilteringAttempts to take a TF of the OAF systemI remeasured
the OAF time delay using the OAF-TF template
  
  3801   Wed Oct 27 21:51:29 2010 SureshUpdatePSLAttenuation of PSL NPRO removedThe laser
power was attenuated to 40 mW yesterday for
ensuring that the power built up within the
  
  11943   Fri Jan 22 01:56:01 2016 ericqUpdateLSCAudio ALSXI hooked up the ALSX DFD output to the
fibox, and used the adjustable delay line
to set the phase properly. I recorded the
 ALSX.wav 
  17209   Tue Oct 25 09:57:34 2022 PacoConfigurationPEMAuto Z on trillium interface boardI pressed the Auto-Z(ero) button for ~
3 seconds at ~9:55 local (pacific) time on
the trillium interface on 1X5.
  
  17210   Tue Oct 25 13:55:37 2022 KojiConfigurationPEMAuto Z on trillium interface boardThis nicely brought the sensing signal
back to ~zero. See attachment


Some basic info:
 Screen_Shot_2022-10-25_at_13.56.46.png 
  17213   Tue Oct 25 22:01:53 2022 ranaConfigurationPEMAuto Z on trillium interface boardthanks, this seems to have recentered well.

It looks like it started to act
funny at 0400 UTC on 10/24, so thats 9 PM
 Screen_Shot_2022-10-26_at_4.45.30_PM.png 
  1492   Thu Apr 16 17:48:00 2009 YoichiConfigurationComputer Scripts / ProgramsAutoDTTAs Peter mentioned in his entry on the last
night's locking, I imported AutoDTT from
Hanford.
  
  1494   Fri Apr 17 11:37:32 2009 YoichiConfigurationComputer Scripts / ProgramsAutoDTTIn order to get test point data with AutoDTT,
you have to pre-trigger test points you want
to use.
  
  8588   Thu May 16 02:34:38 2013 ranaUpdateComputer Scripts / ProgramsAutoRUN GUI resurrectedWe talked about the thing that watches
the scripts for autolocking during the meeting
today.
 Autorun.png 
  12581   Wed Oct 26 16:06:01 2016 JohannesUpdateGeneralAutolocker maintenance[Gautam, Johannes]

The autolocker was acting up today,
Gautam traced it to EPICS channels ( namely
  
  9059   Fri Aug 23 21:01:38 2013 Alex ColeHowToElectronicsAutomated Photodetector Frequency Response System This post describes how to use the
Automated Photodetector Frequency Response
System.
  
  14539   Thu Apr 11 17:30:45 2019 JonUpdateSUSAutomated suspension testing with susPythonSummary

In anticipation of
needing to test hundreds of suspension
signals after the c1susaux upgrade, I've
  
  14542   Mon Apr 15 18:13:23 2019 ranaUpdateComputer Scripts / ProgramsAutomated suspension testing with susPythonif this gonna be general for everybody,
maybe it oughta be called IFOtest
(like the last incarnation that was tried
  
  13772   Thu Apr 19 20:41:09 2018 KojiConfigurationGeneralAux Laser LD dying? (AS port laser injection)I suspect
that the LD of the aux laser is dying.
- The max power we obtain from this
 Aux_laser_adj_Pout.pdfAux_laser_RIN.pdf 
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