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ID Date Author Typedown Category Subject Text Attachments
  12971   Thu May 4 09:52:43 2017 ranaConfigurationComputerscatastrophic multiple monitor failuresThat's a new failure mode. Probably
we can't trust the power to be safe anymore.

Need Steve to order a couple
  
  12978   Tue May 9 15:23:12 2017 SteveConfigurationComputerscatastrophic multiple monitor failuresGautam and Steve,

Surge
protective power strip was install on
 Trip-Lite.jpg 
  12993   Mon May 15 20:43:25 2017 ranaConfigurationComputerscatastrophic multiple monitor failuresthis is not the right one; this Ethernet
controlled strip we want in the racks for
remote control.
  
  13009   Tue May 23 18:09:18 2017 KaustubhConfigurationGeneralTesting ET-3010 PDIn continuation with the previous(ET-3040
PD) test.

The ET-3010 PD requires to be fiber
  
  13070   Fri Jun 16 18:21:40 2017 jigyasaConfigurationCamerasGigE camera IP One of the additional GigE cameras has been
IP configured for use and installation. 

Static IP assigned to the camera-
  
  13160   Wed Aug 2 15:04:15 2017 gautamConfigurationComputerscontrol room workstation power distributionThe 4 control room workstation CPUs (Rossa,
Pianosa, Donatella and Allegra) are now connected
to the UPS.
  
  13440   Tue Nov 21 17:51:01 2017 KojiConfigurationComputersnodus post OS migration adminThe post OS migration admin for nodusa
bout apache, elogd, svn, iptables, etc can
be found in https://wiki-40m.ligo.caltech.edu/NodusUpgradeNov2017
  
  13442   Tue Nov 21 23:47:51 2017 gautamConfigurationComputersnodus post OS migration adminI restored the nodus crontab (copied over
from the Nov 17 backup of the same at /opt/rtcds/caltech/c1/scripts/crontab/crontab_nodus.20171117080001.
There wasn't a crontab, so I made one
  
  13445   Wed Nov 22 11:51:38 2017 gautamConfigurationComputersnodus post OS migration adminConfirmed that this crontab is running
- the daily backup of the crontab seems to
have successfully executed, and there is
  
  13461   Sun Dec 3 05:25:59 2017 gautamConfigurationComputerssendmail installed on nodus Pizza mail didn't go out last weekend
- looking at logfile, it seems like the "sendmail"
service was missing. I installed sendmail
  
  13462   Sun Dec 3 17:01:08 2017 KojiConfigurationComputerssendmail installed on nodus An email has come at 5PM on Dec 3rd.

 
  
  13504   Fri Jan 5 17:50:47 2018 ranaConfigurationComputersmotif on nodusI had to do 'sudo yum install motif'
on nodus so that we could get libXm.so.4
so that we could run MEDM. Works now.
  
  13505   Fri Jan 5 19:19:25 2018 ranaConfigurationSEIBarry Controls 'air puck' instead of 'VOPO style' breadboardWe've been thinking about putting in
a blade spring / wire based aluminum breadboard
on top of the ETM & ITM stacks to get
 mm_slm.jpgScreen_Shot_2018-01-05_at_7.25.47_PM.png 
  13524   Wed Jan 10 14:17:57 2018 johannesConfigurationComputer Scripts / Programsautoburt no longer making backupsI was looking into setting up autoburt
for the new c1auxex2 and found that it stopped
making automatic backups for all machines
  
  13525   Wed Jan 10 15:25:43 2018 johannesConfigurationComputer Scripts / Programsautoburt making backups again


Quote:


  
  13526   Wed Jan 10 16:27:02 2018 SteveConfigurationSEIload cell for weight measurementWe could use similar
load cells   to make the actual
weight measurement on the Stacis legs. This
 stacis3LoadCells.png 
  13539   Fri Jan 12 12:31:04 2018 gautamConfigurationComputerssendmail troubles on nodus I'm having trouble getting the sendmail
service going on nodus since the Christmas
day power failure - for some reason, it 
  
  13540   Fri Jan 12 16:01:27 2018 KojiConfigurationComputerssendmail troubles on nodus I personally don't like the idea of
having sendmail (or something similar
like postfix) on a personal server as it
  
  13542   Fri Jan 12 18:22:09 2018 gautamConfigurationComputerssendmail troubles on nodus Okay I will port awade's python mailer
stuff for this purpose.

  
  13545   Sat Jan 13 02:36:51 2018 ranaConfigurationComputerssendmail troubles on nodus I think sendmail is required on nodus since
that's how the dokuwiki works. That's
why the dokuwiki was trying to send an email
  
  13546   Sat Jan 13 03:20:55 2018 KojiConfigurationComputerssendmail troubles on nodus I know it, and I don't like it. DokuWiki
seems to allow us to use an external server
for notification emails. That would be the
  
  13555   Wed Jan 17 23:36:12 2018 johannesConfigurationGeneralAS port laser injectionStatus of the AS-port auxiliary laser injection


Auxiliary laser with AOM
setup exists, first order diffracted beam
 PSLbeat.svg.pngASpath.svg.png 
  13570   Tue Jan 23 16:02:05 2018 SteveConfigurationSEIload cells1500 and 2000 lbs load cells arrived from
MIT to measure the vertical loads on each
leg.
 stacis3LoadCells.pngDSC00025.JPGDSC00026.JPG 
  13681   Tue Mar 13 20:03:16 2018 johannesConfigurationComputersc1auxex replacementI assembled the rack-mount server that
will long-term replace c1auxex, so we can
return the borrowed unit to Larry.
 IMG_20180313_105154890.jpgIMG_20180313_133031002.jpg 
  13682   Wed Mar 14 23:58:30 2018 johannesConfigurationComputersc1auxex replacementI replaced the borrowed server with the
permanent one today. Before Removing the
current server, Before, I performed several
  
  13687   Mon Mar 19 14:39:09 2018 johannesConfigurationComputersc1auxex replacement[gautam, johannes]

The temperature control output
channel for the XEND seismometer wasn't
  
  13742   Mon Apr 9 23:28:49 2018 johannesConfigurationDAQc1psl channel listI made a list of all the physical c1psl
channels to get a better idea for how many
acromags we need to replace it eventually.
  
  13761   Wed Apr 18 17:15:35 2018 ranaConfigurationComputersNODUS: no xmgrace for dataviewerTurns
out, there is no RPM for XmGrace on Scientific
Linux 7. Since this is the graphic output
  
  13764   Wed Apr 18 22:46:23 2018 johannesConfigurationGeneralAS port laser injectionUsing Gautam's Finesse file and the
cad files for the 40m optical setup I propagated
the arm mode out of the AS port. For the
 ASpath.svg.pngpower_out_fluctuation_DC.pngpower_out_fluctuation_AC_zoom.png 
  13766   Thu Apr 19 01:04:00 2018 gautamConfigurationGeneralAS port laser injectionFor the arm cavity ringdowns, I guess we
don't need AS55/AS110 (although I think
the camera will still be useful for alignment).
  
  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 
  13781   Tue Apr 24 08:36:47 2018 johannesConfigurationGeneralAux Laser LD dying? (AS port laser injection)In September
2017 I measured ~150mW output power,
which was already kind of low. What are the
  
  13784   Tue Apr 24 11:31:59 2018 gautamConfigurationALSProposed changes to EX fiber couplingMotivation:
I want to make another measurement of the
 EX_fiber_MM.pdfEX_fiber_changes.png 
  13786   Tue Apr 24 18:54:15 2018 gautamConfigurationALSProposed changes to EX fiber couplingI started working on the EX table. Work
is ongoing so I will finish this up later
in the evening, but in case anyone is wondering
  
  13789   Wed Apr 25 19:09:37 2018 gautamConfigurationALSNew look EX Fiber couplingSummary:

I implemented most of the things
outlined in my previous elog.
 EX_fiber_MM.pdfIMG_6977.JPGIMG_6972.JPGIMG_6974.JPGIMG_6976.JPG 
  13791   Thu Apr 26 11:24:50 2018 gautamConfigurationALSNew look EX Fiber coupling - pol stabilityHere is a first look at the overnight stability.
For the temperature, I used the calibration
I found in the old psl database file, seems
 polStab.pdf 
  13792   Thu Apr 26 18:58:21 2018 BruceConfigurationALSNew look EX Fiber coupling - pol stability    
  13796   Fri Apr 27 01:36:02 2018 gautamConfigurationALSIR ALS noise performanceSummary:

My goal was to do some further
characterization of the IR ALS system tonight.
 2018_04_BeatMouth_POX.pdf2018_04_BeatMouth.pdfALSSpecgram.pdfALS_ASD.pdfALSstab.pdf 
  13802   Tue May 1 08:04:13 2018 Jon RichardsonConfigurationElectronicsPSL-Aux. Laser Phase-Locked Loop[Jon, Gautam, Johannes]

Summary: In
support of making a proof-of-concept RF measurement
 IMG_2553.jpgIMG_2551.jpgIMG_2552.jpgsrc_gouy_phase_v3.pdf 
  13807   Wed May 2 21:39:33 2018 gautamConfigurationALSIR ALS for EYThe new K6XS mounts I ordered have arrived.
I want to install one of them at the Y-end.
I can't find a picture of the current
  
  13810   Thu May 3 10:40:43 2018 johannesConfigurationGeneralAS port laser injectionInstead of trying to couple the fiber output
into the interferometer, I'm doing the
reverse and maximize the amount of interferometer
 mm_solution_AStable.pngAStable_beampath.pdf 
  13811   Thu May 3 12:10:12 2018 gautamConfigurationGeneralAS port laser injectionI think we need AS55 for locking the configuration
Jon suggested - AS55 I and Q were used to
lock the SRMI previously, and so I'd
  
  13813   Thu May 3 20:29:39 2018 gautamConfigurationElectronicsPSL-Aux. Laser Phase-Locked LoopSome notes about the setup and work at
the PSL table today, Jon can add to / correct
me.
  
  13814   Fri May 4 13:24:56 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Implementation & CharacterizationAttached are final details of the phase-locked
loop (PLL) implementation we'll
use for slaving the AUX 700 mW NPRO laser
 PLL_Schematic.pdfPLL_AUX-PSL_40m.pdf 
  13816   Fri May 4 19:06:28 2018 ranaConfigurationElectronicsAUX-PSL PLL Implementation & Characterizationthis doesn't make much sense to me;
the phase to frequency conversion (mixer-demod
to PZT ) should give us a 1/f loop as Johannes
  
  13817   Fri May 4 21:17:57 2018 gautamConfigurationALSBeathMouth pulled out of PSL tableI have been puzzled about the beat note
level we get out of the BeatMouth for some
time.
  
  13824   Tue May 8 00:40:51 2018 gautamConfigurationALSBeathMouth pulled out of PSL tableSummary:

I did some more BeatMouth characterization.
My primary objective was to do a power budget.
 IMG_6986.JPGIMG_6987.JPG 
  13845   Tue May 15 20:51:27 2018 gautamConfigurationElectronicsMaking PLL setup more permanent[jon, steve, gautam]

Some points which Jon will elaborate
  
  13848   Wed May 16 18:52:50 2018 gautamConfigurationElectronicsPLL mysteries solved[Koji,
Gautam]

Summary:
 PLLanalysis.pdfPZTcal.pdfSR560_funkiness.pdf 
  13858   Thu May 17 13:51:35 2018 Jon RichardsonConfigurationElectronicsDocumentation & Schematics for AUX-PSL PLL[Jon, Gautam]

Attached is supporting documentation
for the AUX-PSL PLL electronics installed
  
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