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ID Date Author Type Category Subjectup Text Attachments
  14177   Wed Aug 22 12:22:27 2018 ranaSummaryElectronicsInspection of the possible dual backplane interfaces for Acromag DAQI think we don't need to keep Crystal
Ref: we can change this into a regular Wenzel
box with no outside control or monitoring.
  
  5672   Sat Oct 15 17:06:20 2011 KojiUpdateLSCInstallation REFL165 REFL165 was installed on the AP table last
night.
Meanwhile I found the DC power level
  
  4002   Wed Dec 1 02:39:00 2010 SureshUpdateSUSInstallation of ETMU07 as ETMX[Kiwamu, Jenne, Koji, Suresh]
The following steps in this process
were completed.
  
  10261   Wed Jul 23 11:15:54 2014 AkhilUpdateElectronicsInstallation of FCs in the 40m As a part of installation of two(X-ARM
and Y-ARM) frequency counters in the 40m,
I have tested their performance when using
 Timingwith2FCs.png 
  6090   Thu Dec 8 16:54:05 2011 JenneUpdateRF SystemInstallation of new demod boxSo far:
* New demod box has been placed in
the LSC rack.
  
  15500   Fri Jul 24 15:40:59 2020 JordanUpdateVACInstallation of two new UPS unitsI installed the Tripp
Lite SMX1000RT2U and Tripp
Lite Smart1000LCD at the
 UPS.jpg 
  16826   Tue May 3 14:02:09 2022 AnchalSummaryBHDInstalled POP path in ITMX Chamber[Anchal, JC]

I installed POP_SM4 and POP_SM5
in the ITMX chamber in the nominal positions.
  
  15916   Fri Mar 12 18:10:01 2021 AnchalSummaryComputer Scripts / ProgramsInstalled cds-workstation on allegraallegra had fresh Debian 10 installed on
it already. I installed cds-workstation packages
(with the help of Erik von Reis). I checked
  
  10905   Thu Jan 15 18:06:34 2015 JenneUpdateComputer Scripts / ProgramsInstalled kerberos on RossaI have installed kerberos on Rossa, so
that I don't have to type my name and
password every time I do an svn checkin,
  
  10906   Thu Jan 15 18:10:19 2015 jamieUpdateComputer Scripts / ProgramsInstalled kerberos on Rossa


  
  10907   Thu Jan 15 18:30:18 2015 JenneUpdateComputer Scripts / ProgramsInstalled kerberos on Rossa 




  
  4511   Mon Apr 11 19:09:59 2011 SureshUpdateRF SystemInstalled low pass filters in the demod boards 
As part of the RF system upgrade
some of the demod boards in the lab were
  
  4514   Mon Apr 11 23:35:02 2011 ranaUpdateRF SystemInstalled low pass filters in the demod boardsI am a little concerned about using these
low pass filters so close to the band edge.
Recall that there is no on-board preamp for
  
  10890   Tue Jan 13 03:47:46 2015 ericqUpdateCDSInstalled new ethernet driver on ChiaraChiara threw another network hissy fit.
Dmesg was spammed with a bunch of messages
like eth0: link up appearing
  
  4238   Wed Feb 2 09:56:55 2011 KojiSummaryGreen LockingInstalled the freq divider and Rana's PFD- The freq divider and Rana's PFD were
hooked up to the ADCs. (Attachment 1)
(I leave the analog PFD not explained
 freq_divider_installation.pdf110201_freq_divider_output.pdf 
  3650   Tue Oct 5 13:59:17 2010 Leo SingerConfigurationComputersInstalled x264-devel on Allegra I installed the package x264-devel
on allegra.martian.  This package provides
headers and libraries for the popular h264
  
  4806   Fri Jun 10 18:49:40 2011 kiwamuUpdateIOOIntensity Noise after the MCLast
night the relative intensity noise (RIN)
of the beam after MC was measured.
 RIN_afterMC.png 
  8224   Mon Mar 4 19:38:21 2013 CharlesUpdateGeneralIntensity Stabilization and Control Systems I have been studying Jamies master's
thesis concerning intensity stabilization
of a solid-state laser (the 1064 nm specifically)
  
  4392   Wed Mar 9 18:17:11 2011 kiwamuUpdateGreen LockingIntensity noise couplingHere
is a new plot for the differential noise
measurement. I plot a noise contribution
 diff_noise.pngIN_TF.png 
  4397   Thu Mar 10 14:06:54 2011 kiwamuUpdateGreen LockingIntensity noise limits the beatnote sensitivityWe are limited
by the intensity noise of the X arm transmitted
 diff_noise_Mar8.pngIN_TF_complete.png 
  4398   Thu Mar 10 14:22:58 2011 kiwamuUpdateGreen LockingIntensity noise limits the beatnote sensitivityThe next steps we should do are :
    - to investigate
a cause of the intensity fluctuation
         
  
  4399   Thu Mar 10 14:29:05 2011 KojiUpdateGreen LockingIntensity noise limits the beatnote sensitivityWe can modify the freq divider circuit
to make it a comparator.

  
  4400   Thu Mar 10 14:30:53 2011 ranaUpdateGreen LockingIntensity noise limits the beatnote sensitivityThere are 3 standard techniques to
reduce this effect:
1) Stabilize the end laser by sensing
  
  4383   Tue Mar 8 06:29:06 2011 kiwamuUpdateGreen LockingIntensity noise setup[Jenne, Chris, Kiwamu]
 A
photo diode and an AOM driver have been newly
  
  4401   Thu Mar 10 16:00:53 2011 Aidan, JoeUpdateGreen LockingIntensity stabilization loop using beatnote DC.Aidan: Joe and I have added a channel that
takes the DC output from the vertex beatnote
PD and sends it, via RFM, to a DAC at the
 P1000313.jpgP1000314.jpgP1000315.jpgGREEN_ISS_LOOP.pdfScreenshot-C1ALS_OVERVIEW.adl.png 
  4403   Thu Mar 10 21:45:34 2011 ranaUpdateGreen LockingIntensity stabilization loop using beatnote DC.Ridiculous
and hacky. Digital stabilization removed
as well as the old "leave a pile of
  
  10020   Tue Jun 10 12:49:46 2014 AkhilUpdateComputer Scripts / ProgramsInterfacing UFC-6000 with Raspberry Pi completed Goal:
 To interface the Mini Circuits
RF Frequency Counter(FC) Model UFC-6000 with
 Interfacing_Script.zip 
  2504   Mon Jan 11 16:59:14 2010 AlbertoUpdateABSLInterferometer BusyI'm currently running a measurement on
the PRC.
Please don't interfere with the IFO
  
  6595   Thu May 3 13:07:05 2012 KojiBureaucracyGeneralInterferometer check-up sessionFrom 2PM, Jenne/Den/Koji. Finished at 10:30PM

    General
    

       More LCD screens! Wider screens!
  
  2271   Sun Nov 15 18:42:10 2009 AlbertoUpdateLockingInterferometer fully locked for 3331 secondsThis afternoon, I tried to lock the interferometer
again after a few days.
After a couple of failed attempts,
  
  10613   Wed Oct 15 20:10:29 2014 ericqUpdateLSCInterim DARM SignalI've done
some preliminary modeling to see if there
is a good candidate for an 
 7x 
  10618   Thu Oct 16 16:21:42 2014 ericqUpdateLSCInterim DARM SignalI've added
(TRX-TRY)/(TRX+TRY) to the DC DARM sweep
plots, and it looks like an even better candidate.
 dcDARMSweep-300.pdfdcDARMSweep-120.pdfdcDARMSweep-50.pdfdcDARMSweep-0.pdf 
  14980   Mon Oct 21 11:44:19 2019 gautamUpdatesafetyInterlock reconnected to Innolight controllerWe also took this opportunity to re-connect
the interlock to the Innolight controller
(after it was disconnected for diagnosing
  
  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 
  4625   Wed May 4 13:51:51 2011 valeraConfiguration Intermittent MC3 UL PD signalThe attached plot shows the 30 day trend
of the MC3 UL PD signal. The signal dropped
to zero at some point but now it is close
 mc3ulpdmon.pdf 
  2598   Fri Feb 12 14:19:28 2010 rana, steveHowToloreInternational FaxSteve showed me how to send an international
fax today:

    Load paper.
   
  
  6560   Tue Apr 24 14:30:08 2012 JamieUpdateCDSIntroducing: rtcds, a utility for interacting with the CDS RTS/RCGThe new rtcds utility
I
have written a new utility for interacting
with the CDS RTS/RCG system: "rtcds". 
  
  3193   Mon Jul 12 11:20:56 2010 Gopal HowToCOMSOL TipsIntrusions (Negative Extrusions)For the sake of future users, I have decided
to periodically add tips and tricks in using
COMSOL that I have figured out, most probably
 6x 
  3194   Mon Jul 12 12:16:50 2010 DmassHowToCOMSOL TipsIntrusions (Negative Extrusions) An entry on the 40m wiki page might
serve you better, and be easier to  sift
through once all is said and done
  
  2615   Fri Feb 19 02:38:32 2010 KojiConfigurationoplevsIntsant green oplevs for ITMs shooting from the endsI
set up instant green oplevs for ITMs.
A green laser pointer has been set
  
  2083   Mon Oct 12 18:37:55 2009 ZachUpdatePSLInventory--Apologies for the late post--
I was at the PSL table taking an
inventory of the components for a while after
  
  12029   Thu Mar 10 16:29:32 2016 gautamUpdateendtable upgradeInventory checkI did a quick sweep of the lab to find
out what hardware has already been acquired
for the X-end table upgrade. The attached
 Inventory_check.pdfDoubler_comparison.pdf 
  12030   Thu Mar 10 16:32:45 2016 ranaUpdateendtable upgradeInventory checkIts not a good idea to use green mounts
with green lasers. Steve should be able to
get another copy of the EY doubler mount
  
  12033   Mon Mar 14 22:42:23 2016 gautamUpdateendtable upgradeInventory check


  
  11587   Wed Sep 9 15:45:11 2015 ericqUpdatePEMInverted STS filters in C1OAFOur online subtraction filters for PRC
angle and MC length were trained on
the raw ADC signals, so I've inverted
  
  15877   Mon Mar 8 12:01:02 2021 Paco, AnchalSummarytrainingInvestigate how-to XARM locking[Paco, Anchal]

- Started zoom stream; thanks to
whoever installed it!
  
  15878   Mon Mar 8 12:40:35 2021 gautamSummarytrainingInvestigate how-to XARM lockingFor the arm locking, the "Restore
Xarm (XARM POX)" script from the "IFO_CONFIGURE"
MEDM screen should get you there (I just checked
  
  10723   Mon Nov 17 20:40:29 2014 rana, diegoUpdateIOOInvestigating the IMC WFS situationWe've known for years that the IMC WFS
sensing chain is pointlessly bad, but until
recently, we haven't thought it was worth
  
  15623   Tue Oct 13 11:13:54 2020 gautamUpdateBHDInvestigation into RF44 sensingAttachment
#1: spectra of the
 phaseNoisePSD.pdfloopTF.pdf 
  14292   Tue Nov 13 18:09:24 2018 gautamUpdateLSCInvestigation of SRCL-->MICH couplingSummary:

I've been looking into the
cross-coupling from the SRCL loop control
 TF_sweptSineMeas.pdfdigitalDemod.pdfdigitalDemod_hist.pdfDRMI_LSCspectrogram.pdf 
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