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  40m Log, Page 196 of 341  Not logged in ELOG logo
ID Date Author Type Category Subjectup Text Attachments
  8948   Wed Jul 31 21:12:05 2013 manasaUpdateGeneralPump down called off[Koji, Manasa]
We missed to check that we had the green
  
  5357   Wed Sep 7 12:03:49 2011 steveUpdateVACPump down has startedJamie and Steve
We closed ITMX and ITMY chambers
and started pumping around 11am
  
  15666   Mon Nov 9 17:40:17 2020 gautamUpdateGeneralPumpdown[koji, rana, gautam]

1100 - EY chamber inspected, no
issues were found --> EY heavy door on
 IMG_8937.jpgpumpdown.png 
  15667   Tue Nov 10 11:31:13 2020 KojiUpdateGeneralPumpdownMain volume pressure as of 11:30AM 2020/11/10  Screen_Shot_2020-11-10_at_11.30.21.png 
  12575   Thu Oct 20 15:59:52 2016 SteveUpdateVACPumpdown 80 has completedIFO pressure 1.7E-4 Torr on new not logged
cold cathode gauge. P1 <7E-4 Torr

 7hPd80.png8hPd80.png9hPd80.png 
  12574   Thu Oct 20 09:17:08 2016 SteveUpdateVACPumpdown 80 has startedPumping again after 7 days at atmosphere.

BS, ITMY and OMC chambers were
open only.
 readyPd80.pngbeforePd80.pngpd80at1h.png7d_atm.png 
  14426   Fri Feb 1 13:16:50 2019 gautamUpdateSUSPumpdown 83 underway[chub, bob, gautam]


Steps described in previous
elog were carried out
EY heavy
  
  14428   Fri Feb 1 21:52:57 2019 gautamUpdateSUSPumpdown 83 underway[jon, koji, gautam]


IFO is at ~1 mtorr, but
pressure is slowly rising because of outgassing
  
  8976   Wed Aug 7 10:51:49 2013 SteveUpdateVACPumpdown at 26hrs Cold cathode gauge CC1 -h (horizontal)
just coming on 9.2e-5 Torr
P2 is the fore line pressure of the
 26hr.png14datm.png 
  8970   Tue Aug 6 10:06:29 2013 SteveUpdateVACPumpdown is at 500Torr The pumpdown has started at 8:38am
Manasa was here to confirm good alignment
of the IFO
 befPd.png 
  8973   Tue Aug 6 16:45:31 2013 SteveUpdateVACPumpdown is completed IFO  P1=1mT PSL shutter is opened
 
 8hrPd76.png1mT.png 
  14369   Wed Dec 19 19:51:19 2018 gautamUpdateGeneralPumpdown prep[Koji,
gautam]

Summary:
 OMCscan.pdf 
  14631   Wed May 22 22:50:13 2019 gautamUpdateVACPumpdown prepI did the following:


Checked the ETMY OSEM sensing
matrix and OSEM actuation matrix - more on
  
  14370   Wed Dec 19 21:14:50 2018 gautamUpdateVACPumpdown tomorrow I just spoke to Jon who asked me to make
this elog - we will be ready to test one
or more parts of the pumpdown procedure tomorrow
  
  14372   Thu Dec 20 08:38:27 2018 JonUpdateVACPumpdown tomorrow Linked is the pumpdown
procedure, contained in the old 40m documentation.
The relevant procedure is "All Off -->
  
  14634   Thu May 23 15:30:56 2019 gautamUpdateVACPumpdown underway - so far so good![chub, koji, gautam]


We executed the pre-pumpdown
tasks per the checklist - heavy doors were
 pumpdownPres.png 
  64   Mon Nov 5 22:24:38 2007 Andrey, SteveOmnistructureVACPumping down goes smoothly
We (Steve and Andrey) started pumping down
at 3.25PM today. At 9 PM we turned off the
  
  16490   Mon Dec 6 14:26:52 2021 KojiUpdateVACPumping down the RGA sectionJordan reported that the RGA section needs
to be pumped down to allow the analyzer to
run at sufficiently low pressure (P<1e-4
  
  16493   Tue Dec 7 13:12:50 2021 KojiUpdateVACPumping down the RGA sectionSo that Jordan can run the RGA scan this
afternoon, I ran TP3 and started pumping
down the RGA section.
  
  16494   Wed Dec 8 10:14:43 2021 JordanUpdateVACPumping down the RGA sectionAfter an overnight pumpdown/RGA warm up,
I took a 100 amu scan of the RGA volume and
subsequent pumping line. Attached is a screenshot
 40m_RGAVolume_12_8_21.PNG40m_RGAVolume_Torr_12_8_21.PNG 
  16501   Fri Dec 10 19:22:01 2021 KojiUpdateVACPumping down the RGA sectionThe scan result was ~x10 higher than the
previously reported scan on 2020/9/15 (https://nodus.ligo.caltech.edu:8081/40m/15570),
  
  14406   Fri Jan 18 17:44:14 2019 gautamUpdateVACPumping on RGA volumeSteve came by the lab today, and looked
at the status of the upgraded vacuum system.
He recommended pumping on the RGA volume,
 CC4.png 
  15393   Thu Jun 11 17:35:34 2020 gautamUpdateVACPumpspool UPS needs battery replacementSummary:

The pumpspool UPS has its "
  
  15394   Fri Jun 12 01:23:32 2020 KojiUpdateVACPumpspool UPS needs battery replacement1. I agree that it's likely that it
was the temp signal glitch.
Recom #2: I approve to reopen the
  
  15396   Fri Jun 12 17:32:40 2020 KojiUpdateVACPumpspool UPS needs battery replacementJon and Koji remotely supported Jordan's
resetting the TP2 controller.

Here
 Screen_Shot_2020-06-12_at_17.22.23.png 
  15397   Fri Jun 12 19:02:52 2020 gautamUpdateVACPumpspool UPS needs battery replacementI still don't understand why restoring
the vacuum is contingent on this functionality
working. All the TPs have their own internal
  
  15398   Fri Jun 12 19:23:56 2020 KojiUpdateVACPumpspool UPS needs battery replacementThe vacuum safety policy and design are
not clear to me, and I don't know what
the first and second defense is. Since we
  
  15399   Fri Jun 12 19:33:31 2020 gautamUpdateVACPumpspool UPS needs battery replacementDidn't mean to sound whiny. I will
wait until the vacuum team tells me it is
okay.
  
  12338   Tue Jul 26 16:01:32 2016 SteveSummaryVACPurge compressed air systemThanks for checking this out Koji

The builder in 1996 was Process
System International, Inc ( Westborough,
 cleanAirSupl.pdfmobileHEPA.jpg 
  12339   Tue Jul 26 17:41:59 2016 KojiSummaryVACPurge compressed air systemWe have no number for the CFM without calculation.
We can't assume a random number like
10-15
  
  12337   Tue Jul 26 14:24:38 2016 KojiSummaryVACPurge compressed air system at LHOI've visited the purge clean
air system at LHO Yarm mid-station with John
Worden.
 12x 
  9440   Wed Dec 4 15:43:13 2013 JenneSummaryLSCPut LSC DAQ channels backLast week, Koji cleaned up the LSC model
to make it much more readable, while he was
working on piping the ALS signals to the
  
  4138   Tue Jan 11 18:41:43 2011 JenneUpdateIOOPut MC PZT offset onto MC board, instead of on awkward cart[Larisa and Jenne]
We wanted to get rid of the awkward
cart that was sitting behind the 1Y1 rack. 
 D040180-B.pdf 
  4140   Wed Jan 12 01:38:52 2011 KojiUpdateIOOPut MC PZT offset onto MC board, instead of on awkward cartI can not think of any reason that the
input impedance of 13kOhm between the pos/neg
inputs produces such a big change at the
  
  4147   Wed Jan 12 22:39:16 2011 SureshUpdateIOOPut MC PZT offset onto MC board, instead of on awkward cart


   
        
            
 P1120508.JPGP1120509.JPGD040180-B_with_5V_offset.pdf 
  5858   Wed Nov 9 21:32:38 2011 MirkoUpdateAdaptive FilteringPut accelerometers 4-6 on top of MC2 tankPut the accelerometers on top of MC2. Orientated
as the arms,GUR1 and STS1:
 09112011069.jpgCoherence_quiet_time.pngCoherence_quiet_time.fig 
  4029   Wed Dec 8 17:05:39 2010 josephbUpdateCDSPut in dolphin fiber between c1sus and c1lsc[josephb,Suresh]
We put in the fiber for use with
the Dolphin reflected memory between c1sus
  
  6314   Fri Feb 24 16:10:48 2012 mikeUpdateComputersPyNDS and a PlotPower Spectral Density plot using PyNDS,
comparing 5 fast data channels for ETMX.
**EDIT** Script here:
 PSD_Comparison.png 
  6316   Fri Feb 24 18:59:04 2012 JenneUpdateComputersPyNDS and a Plot

    

       
            
  
  6341   Wed Feb 29 17:32:11 2012 MikeUpdateComputersPyNDS and a Plot


   
        
            
  
  4157   Fri Jan 14 17:13:39 2011 josephbUpdateCamerasPylon driver for Basler Cameras installed on MegatronAfter getting some help from the Basler
technical support, I was directed to the
following ftp link:
  
  12937   Mon Apr 10 16:00:26 2017 rebeccaUpdateCamerasPylon installation warningWhen trying to install an older version
of Pylon packaged for Debian that Joe B.
had sent, it gave the warning that the package
  
  12938   Mon Apr 10 18:42:09 2017 johannesUpdateCamerasPylon installation warningIt looks like we may not need to use this
old Pylon version after all. Gautam and I
looked into installing SnapPy with the makefile
  
  10209   Wed Jul 16 01:18:02 2014 ranaSummaryLSCPython Wavelet peak finding for dramatic ALS - Red Resonance finding speedupNew script called scripts/ALS/findRedResonance.py
finds the IR resonance in less than 20 seconds.

    Do a ~2 FSR scan of the
 findRedResonance.pdf 
  10211   Wed Jul 16 01:35:16 2014 KojiSummaryLSCPython Wavelet peak finding for dramatic ALS - Red Resonance finding speedupFrom the last plot:
- Subtracting the offset of 0.0095,
the modulation depth were estimated to be
  
  1075   Thu Oct 23 18:45:18 2008 AlbertoOmnistructureComputer Scripts / ProgramsPython code for GPIB devices developed for the Absl length experimentI wrote two Python scripts for my measurement
that can be also used/imitated by others:
sweepfrequency. py and HP8590.py. The first
 HP8590.pysweepfrequency.py 
  15021   Thu Nov 7 17:55:37 2019 shrutiUpdateComputer Scripts / ProgramsPython packages on donatellaToday I realized that pip and other python2,3
packages were installed in the conda base
environment, so after running
  
  15055   Wed Nov 27 18:51:22 2019 Gavin WallaceUpdateIMCQ Measurement of Test Masses[Yehonathan, Gavin]

As the resonant modes of the 40m
TMs are at high frequencies (starting at
  
  15065   Tue Dec 3 14:52:13 2019 ranaUpdateIMCQ Measurement of Test Masses

  
  15076   Thu Dec 5 08:44:44 2019 GavinUpdateLoss MeasurementQ Measurements of Test Masses[Yehonathan, Gavin]

Measuring POX11_Q_MON and injecting
a signal into the ITMX_UL_IN port a signal
 20191205_132158.jpg 
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