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ID Date Author Type Category Subjectup Text Attachments
  15502   Tue Jul 28 12:22:40 2020 JonUpdateVACVac interlock test today 1:30 pmThis afternoon Jordan is going to carry
out a test of the V4 and V5 hardware
interlocks. To inform the interlock improvement
  
  15504   Tue Jul 28 14:11:14 2020 JonUpdateVACVac interlock test today 1:30 pmThis test has been completed. The IFO configuration
has been reverted to nominal.

For future reference: yes,
  
  14546   Tue Apr 16 22:06:51 2019 gautamUpdateVACVac interlock tripped againThis happened again, about 30,000 seconds
(~2:06pm local time according to the logfile)
ago. The cited error was the same -
 Screenshot_from_2019-04-16_22-05-47.pngScreenshot_from_2019-04-16_22-06-02.png 
  14550   Wed Apr 17 18:12:06 2019 gautamUpdateVACVac interlock tripped againAfter getting the go ahead from Chub and
Jon, I restored the Vacuum state to "Vacuum
normal", see Attachment #1. Steps:
 Screenshot_from_2019-04-17_18-11-45.pngScreenshot_from_2019-04-17_18-21-30.png 
  14574   Thu Apr 25 10:32:39 2019 JonUpdateVACVac interlocks updatedI slightly cleaned up Gautam's disabling
of the UPS-predicated vac interlock and restarted
the interlock service. This interlock is
  
  15421   Mon Jun 22 10:43:25 2020 JonConfigurationVACVac maintenance at 11 amThe vac system is going down at 11 am today
for planned maintenance:


Re-install the repaired
  
  15424   Mon Jun 22 20:06:06 2020 JonConfigurationVACVac maintenance completeThis work is finally complete. The dry
pump replacement was finished quickly but
the controls updates required some substantial
 Pumpdown-6-22-20.png 
  15425   Tue Jun 23 17:54:56 2020 ranaConfigurationVACVac maintenance completeI propose we go for all CAPS for all channel
names. The lower case names is just a holdover
from Steve/Alan from the 90's. All other
  
  15748   Wed Jan 6 15:28:04 2021 gautamUpdateVACVac rack UPS batteries replaced[chub, gautam]

the replacement was done this afternoon.
The red "Replace Battery" indicator
  
  14380   Thu Jan 3 15:08:37 2019 gautamOmnistructureVACVac status unknownLarry W came by the 40m, and reported that
there was a campus-wide power glitch (he
was here to check if our networking infrastructure
 Screenshot_from_2019-01-03_15-19-51.pngScreenshot_from_2019-01-03_15-14-14.png997B13A9-CAAF-409C-A6C2-00414D30A141.jpeg 
  15556   Fri Sep 4 15:26:55 2020 JonUpdateVACVac system UPS installationThe vac controls are going down now to
pull and test software changes. Will advise
when the work is completed.
  
  15557   Fri Sep 4 21:12:51 2020 JonUpdateVACVac system UPS installationThe vac work is completed. All of the vacuum
equipment is now running on the new 120V
UPS, except for TP1. The 230V TP1 is still
  
  15558   Sat Sep 5 12:01:10 2020 JonUpdateVACVac system UPS installationSummary

Yesterday's UPS
switchover was mostly a success. The new
Tripp
 vac_medm.pngvac_medm.png 
  14456   Fri Feb 15 11:58:45 2019 JonUpdateVACVac system is back upThe problem encountered with the vac controls
was indeed resolved via the recommendation
I posted yesterday. The Acromags had gone
  
  14458   Fri Feb 15 18:41:18 2019 ranaUpdateVACVac system is back upIf the acromags lock up whenever there
is an electrical spike, shouldn't we
have them on UPS to smooth out these ripples?
  
  14460   Fri Feb 15 19:50:09 2019 ranaUpdateVACVac system is back upThe acromags are on the UPS. I suspect
the transient came in on one of the signal
lines. Chub tells me he unplugged one of
  
  14387   Mon Jan 7 11:54:12 2019 JonConfigurationComputer Scripts / ProgramsVac system shutdownI'm making a controlled shutdown of
the vac controls to add new ADC channels.
Will advise when it's back up.
  
  14388   Mon Jan 7 19:21:45 2019 JonConfigurationComputer Scripts / ProgramsVac system shutdownADC work finished for the day. The vac
controls are back up, with all valves
CLOSED and all pumps OFF.
  
  3343   Sat Jul 31 22:35:01 2010 KojiUpdateVACVac-P1 still 1.2mtorrI resumed the pumping from 19:00.
Now the valve RV1 is full open. But
the pumping is really slow as we are using
  
  14452   Thu Feb 14 15:37:35 2019 gautamUpdateVACVacromag failure[chub, gautam]

Sumary:

One of the XT1111 units (XT1111a)
 Screenshot_from_2019-02-14_15-40-36.pngIMG_7320.JPGScreenshot_from_2019-02-14_20-43-15.png 
  14453   Thu Feb 14 18:16:24 2019 JonUpdateVACVacromag failureI sent Gautam instructions to first try
stopping the modbus service, power
cycling the Acromag chassis, then
  
  14309   Mon Nov 19 23:38:41 2018 JonOmnistructure Vacuum Acromag Channel AssignmentsI've completed bench testing of all
seven vacuum Acromags installed in a custom
rackmount chassis. The system contains
 Binary_IO_Channel_Assignments.pdf 
  14296   Wed Nov 14 21:34:44 2018 JonOmnistructure Vacuum Acromags installed and testedAll 7 Acromag units are now installed in
the vacuum chassis. They are connected to
24V DC power and Ethernet.
 IMG_3003.jpg 
  14375   Thu Dec 20 21:29:41 2018 JonOmnistructureUpgradeVacuum Controls Switchover Completed[Jon, Chub, Koji, Gautam]

Summary

Today we carried
out the first pumpdown with the new vacuum
 40m_vacuum_acromag_channels.pdf 
  14493   Thu Mar 21 18:36:59 2019 JonOmnistructureUpgradeVacuum Controls Switchover CompletedUpdated vac channel list is attached. There
are several new ADC channels.

 40m_Vacuum_Acromag_Channels_20190321.pdf 
  14315   Sun Nov 25 17:41:43 2018 JonOmnistructure Vacuum Controls Upgrade - Status and PlansNew hardware has been installed in the
vacuum controls rack. It is shown in the
below post-install photo.
 rack_photo.jpg 
  13179   Wed Aug 9 16:34:46 2017 ranaUpdateVACVacuum Document recoveredSteve and I found the previous draft of
the 40m Vacuum Document. Someone in 2015
had browsed into the Docs history and then
  
  16508   Wed Dec 15 15:06:08 2021 JordanUpdateVACVacuum Feedthru InstallJordan, Chub

We installed the 4x DB25 feedthru
flange on the North-West port of ITMX chamber
  
  9017   Fri Aug 16 09:35:18 2013 SteveUpdateVACVacuum Normal state recognition is back

    

       
            
 VacuumNormal.pngvacValvesDisabled.jpg 
  16980   Fri Jul 8 14:03:33 2022 JCHowToVACVacuum Preparation for Power Shutdown [Koji, JC]

Koji and I have prepared the vacuum
system for the power outage on Saturday.
 Screen_Shot_2022-07-12_at_7.02.14_AM.png 
  14308   Mon Nov 19 22:45:23 2018 JonOmnistructure Vacuum System SubnetworkI've set up a closed subnetwork for
interfacing the vacuum hardware (Acromags
and serial devices) with the new controls
  
  5180   Wed Aug 10 22:47:22 2011 ranaSummaryVACVacuum Workstation (linux3) re-activatedFor some reason the workstation at the
vac rack was off and unplugged. Nicole and
I plugged its power back in to the EX rack.
  
  11352   Wed Jun 10 15:54:14 2015 SteveUpdateVACVacuum comp. rebootedKoji and Steve succeded rebooting C1vac1,
C1vac2 and pressure reading is working now

More tomorrow .........
 afterReb061015.png 
  11353   Thu Jun 11 19:40:59 2015 KojiUpdateVACVacuum comp. rebootedThe serial connections to the vacuum gauges
were recovered by rebooting c1vac1 and c1vac2.

Steve claimed that the vacuum screen
  
  11354   Fri Jun 12 08:40:17 2015 SteveUpdateVACVacuum comp. rebootedKoji and Steve,

One computer expert and one vacuum
expert required.
 vacMonNoGauges.pngprepReboot.png 
  1673   Mon Jun 15 15:17:33 2009 josephb, SteveConfigurationVACVacuum control and monitor screensWe updated the vacuum control and monitor
screens  (C0VAC_MONITOR.adl and C0VAC_CONTROL.adl). 
We also updated the /cvs/cds/caltech/target/c1vac1/Vac.db
  
  15499   Thu Jul 23 15:58:24 2020 JonSummaryVACVacuum controls refurbishment planThis year we've struggled with vacuum
controls unreliability (e.g., spurious interlock
triggers) caused by decaying hardware. Here
  
  14419   Fri Jan 25 16:14:51 2019 gautamUpdateVACVacuum interlock code, N2 warningI reset the remote of this git repo to
the 40m version instead of Jon's personal
one, to ensure consistency between what's
  
  15283   Wed Mar 25 15:15:55 2020 gautamUpdateVACVacuum interlock code, N2 warning updateThe email address in the N2 checking script
wasn't right - I now updated it to email
the 40m list if the sum of reserve tank pressures
  
  15501   Mon Jul 27 15:48:36 2020 JonSummaryVACVacuum parts orderedTo carry out the next steps of the vac
refurbishment plan [ELOG
15499], I've ordered parts necessary
  
  16312   Thu Sep 2 21:21:14 2021 KojiSummaryComputersVacuum recovery 2Attachment 1:
We are pumping the main volume with
TP2. Once P1a reached the pressure ~2.2mtorr,
 Screenshot_2021-09-02_21-20-24.pngScreenshot_2021-09-02_21-20-48.png 
  7272   Fri Aug 24 16:03:39 2012 SteveUpdateVACVacuum related work at atmVacuum related work at atmosphere:
Atm1,  Check all chamber dog
clamps tightness with torque wrench,
 IMG_1563.JPGIMG_1565.JPGIMG_1566.JPG 
  15526   Fri Aug 14 10:10:56 2020 JonConfigurationVACVacuum repairs todayThe vac system is going down now for planned
repairs [ELOG
15499]. It will likely take most
  
  15527   Sat Aug 15 02:02:13 2020 JonConfigurationVACVacuum repairs todayVacuum work is completed. The TP2 and TP3
interlocks have been overhauled as proposed
in ELOG
  
  8752   Wed Jun 26 01:30:31 2013 ranaSummaryPEMVariation in 10-30 Hz seismic RMSFor quite a while (no one knows how long),
we've seen fluctuations in the 10-30 Hz seismic
motion. This shows up as the purple trace
 gur1z_rms.pdfgur1z.pdf 
  828   Tue Aug 12 12:21:13 2008 josephbConfigurationCamerasVariation in fit over 140 images for GC650 and GC750Used matlab to calculate Gaussian fits on
145 GC650 images and 142 GC750 images.  These
were individual images (no averaging) looking
  
  8882   Fri Jul 19 22:35:06 2013 KojiSummaryLSCVarious Arm signal (Yarm)The StripTool plot attached below shows
various arm signals measured with the Y arm
cavity swept using ALS.
 various_arm_signal.png 
  9685   Mon Mar 3 17:35:10 2014 KojiUpdateLSCVarious demod phase measurementI wanted to check how the refl signals
looked like. 
I decided to measure the demod phase
  
  2556   Mon Feb 1 18:33:10 2010 steveUpdateMOPAVe half the lazer!The 2W
NPRO from Valera arrived today and I haf
 inno2w.JPGinno2Wb.JPG 
  17036   Tue Jul 26 19:50:25 2022 DeekshaUpdateComputer Scripts / ProgramsVector fittingTrying to vectfit to the data taken from
the DFD previously but failing horribly.
I will update this post as soon as I get
 data.pngfit_attempt.png 
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