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  40m Log, Page 272 of 346  Not logged in ELOG logo
ID Date Author Type Category Subjectup Text Attachments
  3637   Fri Oct 1 16:46:20 2010 steveBureaucracySAFETYYuta received 40m-101-safety trainingOur visiting graduate student Yuta Michimura
received 40m specific basic safety training
today.
  
  5052   Thu Jul 28 13:51:00 2011 SonaliUpdateGreen LockingZHL-32A-S.Initially I was using RFPD-1611to get the
IR beat frequency. Its gain was not very
high, so I was getting a very low signal
  
  15031   Fri Nov 15 18:59:08 2019 ranaUpdateComputersZITA: started upgrade from Ubuntu 14 LTS to 18 LTSand so it begins...until this is finished
I have turned off the projector and moved
the striptools to the big TV (time to look
  
  15033   Mon Nov 18 16:32:15 2019 gautamUpdateComputersZITA: started upgrade from Ubuntu 14 LTS to 18 LTSthe upgrade seems to have been successfully
executed - the machine was restarted at ~430pm
local time. Projector remains off and diagnostic
  
  16156   Mon May 24 10:19:54 2021 PacoUpdateGeneralZita IOO stripUpdated IOO.strip on Zita to show WFS2
pitch and yaw trends (C1:IOO-WFS2_PIY_OUT16
 Screenshot_from_2021-05-24_18-09-37.png24and25_05_2021_PEM_BS_10_30.png 
  14265   Fri Nov 2 09:47:57 2018 SteveMetaphysicsTreasureZojirushi is dead     It took at least
ten years to rust away. 
 DSC01773.JPGzoji.JPG 
  14271   Mon Nov 5 15:55:39 2018 SteveMetaphysicsTreasureZojirushi is deadWe
have no coffee machine.

We
 zoji.JPG 
  14272   Tue Nov 6 09:45:32 2018 aaronMetaphysicsTreasureZojirushi is deadNew
all organic machine.
  
  15561   Sun Sep 6 14:17:18 2020 JonUpdateEquipment loanZurich Instruments analyzerOn Friday, I grabbed the Zurich Instruments
HF2LI lock-in amplifier and brought
it home. As time permits, I will work towards
  
  16226   Fri Jun 25 19:14:45 2021 JonUpdateEquipment loanZurich Instruments analyzerI returned the Zurich Instruments analyzer
I borrowed some time ago to test out at home.
It is sitting on first table across from
 ZI.JPG 
  11033   Sun Feb 15 16:20:44 2015 KojiSummaryLSC[ELOG LIST] 3f modulation cancellationSummary
of the ELOGS

3f
modulation cancellation theory 
  
  11034   Sun Feb 15 20:55:48 2015 ranaSummaryLSC[ELOG LIST] 3f modulation cancellationI wonder if DRMI can be locked on 3f using
this lower 55 MHz modulation depth. It seems
that PRMI should be unaffected, but that
  
  11035   Mon Feb 16 00:08:44 2015 KojiSummaryLSC[ELOG LIST] 3f modulation cancellationThis KTP crystal has the maximum allowed
RF power of 10W (=32Vpk) and V_pi = 230V.
This corresponds to the maximum allowed
  
  3815   Thu Oct 28 23:17:15 2010 yutaSummaryCDS[EMERGENCY] accidentally deleted daqdRana showed me that if c1sus machine runs
c1mcs stuff(and c1x02 stuff) only, we can
use dataviewer without crashing fb.
  
  3821   Fri Oct 29 11:25:15 2010 josephb, yutaSummaryCDS[EMERGENCY] accidentally deleted daqdProblem:
Missing daqd file, i.e. the framebuilder
executable.
  
  9007   Tue Aug 13 17:20:54 2013 KojiUpdateCDS[Fixed] c1iscex needs helpc1x01 timing issue was solved. Now all
of the models on c1iscex are nicely running.
Symptons
  
  11032   Sat Feb 14 22:14:02 2015 KojiSummaryLSC[HOW TO] 3f modulation cancellationWhen I finished my measurements, the modulation
setup was reverted to the conventional one.
If someone wants to use the 3f cancellation
 freq_gen_box.JPGdelay_line.JPGcable_spec.pdf 
  16663   Thu Feb 10 21:51:02 2022 KojiUpdateCDS[Solved] Huge random numbers flowing into ETMX/ETMY ASC PIT/YAWHuge random numbers are flowing into ETMX/ETMY
ASC PIT/YAW. Because of this, I could not
damp the ETMX/ETMY suspension at the beginning
 Screenshot_2022-02-10_21-46-02.pngScreen_Shot_2022-02-10_at_21.54.21.pngScreen_Shot_2022-02-10_at_22.14.23.png 
  16664   Fri Feb 11 10:56:38 2022 AnchalUpdateCDS[Solved] Huge random numbers flowing into ETMX/ETMY ASC PIT/YAWYeah, this is a known issue actually. We
go to ASC screen and manually swich off all
the outputs after every reboot. We haven't
  
  16666   Fri Feb 11 12:22:19 2022 ranaUpdateCDS[Solved] Huge random numbers flowing into ETMX/ETMY ASC PIT/YAWyou
can hand edit the autoBurt file which the
FE uses to set the values after boot up.
  
  16668   Fri Feb 11 17:07:19 2022 AnchalUpdateCDS[Solved] Huge random numbers flowing into ETMX/ETMY ASC PIT/YAWThe autoBurt file for FE already has the
C1:ASC-ETMX_PIT_SW2 (and other channels for
ETMY, ITMX, ITMY, BS and for YAW) present,
  
  13351   Mon Oct 2 19:03:49 2017 gautamUpdateCDS[Solved] c1ioo DC errorsThis did the trick - I simply ran

sudo
 CDSoverview.png 
  985   Tue Sep 23 13:25:07 2008 robUpdateLockinga bit betterI've been spending time working on the short
DOF loops (PRC,MICH,SRC) in an attempt to
make the 
  
  3112   Thu Jun 24 01:02:34 2010 Sharmilla, Rana and KiwamuUpdateGreen Lockinga channel for PPKTP temperatureWe added
a channel on c1psl in order to monitor the
  
  3113   Thu Jun 24 06:49:29 2010 AidanUpdateGreen Lockinga channel for PPKTP temperatureIs this a setpoint temperature that we
can change by writing to the channel or is
it a readout of the actual temperature of
  
  4294   Tue Feb 15 02:13:16 2011 kiwamuSummaryASCa daytime task : small signals on ETMX OLRana
and I found that the QPD for the optical
lever at X end are showing small signals.
  
  5369   Fri Sep 9 13:29:09 2011 kiwamuUpdateIOOa history of PZT mirrorSomething happened about 8 years ago.
Old
iLog entry by AJW (2003/Sep/8)
  
  4449   Mon Mar 28 17:06:15 2011 kiwamuUpdateGreen Lockinga mixer schoolIn
the last week Matt and I modified the MFD
 mixers.png 
  4450   Mon Mar 28 18:13:32 2011 ranaUpdateGreen Lockinga mixer schoolUsing 2 dBm for a Level 7 mixer is so bogus,
that I will dismantle this as soon as I come
over.
  
  4451   Mon Mar 28 18:22:43 2011 kiwamuUpdateGreen Lockinga mixer schoolPLEASE DO
NOT DISMANTLE THE SETUP ! 
  
  4923   Thu Jun 30 14:11:55 2011 kiwamuUpdateABSLa photo of ABSL setup on the AP tableHere
is a picture of the latest ABSL setup at
the east part of the AP table.
 ABSLsetup.png 
  4850   Tue Jun 21 20:35:50 2011 kiwamuUpdateLSCa script to measure sensing matrixLast
night I was making a script which will measure
the sensing matrix using the realtime LOCKIN
 elog.png 
  4778   Wed Jun 1 21:56:43 2011 KojiUpdateGeneralaLIGO BBPD / Green PD final resultHere is the conclusive result for the
circuit configuration for aLIGO BBPD and
40m Green PD. 
 PD_response.pdflinearity_GALI_6.pdf 
  4649   Fri May 6 01:27:12 2011 KojiSummaryGeneralaLIGO BBPD / Green PD investigationMinicircuits
ERA-5SM was used for the RF
amp of the BBPD. This amp is promising
 PD_response.pdfFFD-100_AP389_MCL.pdf 
  4658   Sat May 7 12:57:54 2011 KojiSummaryGeneralaLIGO BBPD / Green PD investigationThe RF amplifier of the prototype BBPD
has been replaced from ERA-5SM to MAR-6SM.
 PD_response.pdf 
  4676   Tue May 10 09:05:49 2011 KojiUpdateGeneralaLIGO BBPD / Green PD investigationBBPD update
- The BBPD circuit has been constructed
on the aLIGO BBPD board
 PD_response.pdf 
  13650   Thu Feb 22 16:11:14 2018 KojiUpdateGeneralaLIGO EOM crystal replacementaLIGO
EOM crystal replacement


The entire operation has
 IMG_3421.JPGIMG_3426.JPGIMG_3427.JPG 
  13720   Fri Mar 30 03:23:50 2018 KojiUpdateGeneralaLIGO EOM workI have been working on the aux beat setup
on the PSL table between 9PM-3AM.

This work involved:
  
  9089   Fri Aug 30 01:01:28 2013 rana, nicSummaryComputer Scripts / ProgramsaLIGO Noise Budget code installed and runningChris Wipf has been developing a new Noise
Budget code that allows us to use our existing
Simulink models to handle all of the noise
 NBplots.pngScreen_Shot_2013-08-30_at_1.00.02_AM.png 
  15818   Thu Feb 18 18:05:04 2021 gautamUpdateSUSaLIGO Sat Amp characterizationBefore installation, I performed a bunch
of tests on the aLIGO sat amp. All the measurements
were made with the dummy suspension box substituting
 OSEMnoise.pdfLEDdriveNoise.pdf 
  15819   Thu Feb 18 20:20:25 2021 KojiUpdateSUSaLIGO Sat Amp characterizationYeah, it's really inconsistent. You
had 35mA LED drive and the current noise
of the noisy channel was 5e-7 A/rtHz at 1Hz.
  
  15809   Tue Feb 16 14:56:44 2021 gautamUpdateSUSaLIGO Sat Amp installed, powered[jordan,
gautam]


Ran 60ft long cables from
 MC1_deadUL.pngIMG_9100.jpg 
  15814   Wed Feb 17 16:11:53 2021 gautamUpdateSUSaLIGO Sat Amp installed, poweredThere is some non-trivial sign flipping
in the sensors/coils in this new setup because
it is a hybrid one with the old interfacing
  
  15817   Thu Feb 18 15:33:21 2021 gautamUpdateSUSaLIGO Sat Amp installed, powered and commissionedThe WFS servo was recommissioned. The matrix
can be tuned a bit more, but for now, I've
recovered the old performance and the alignment
  
  11438   Thu Jul 23 03:09:05 2015 ericqUpdateLSCaLIGO demod board lives!I'm a little mystified. Peeking inside
the aLIGO demod board, I saw that the reason
that two of the channels weren't working
 beatbox_vs_aLIGO.png 
  11468   Thu Jul 30 14:42:03 2015 ericqUpdateLSCaLIGO demod board lives!ALS is not currently
limited by the demod board or whitening electronics.
 partialALSbudget.pngdemodDriveLevels.pngALScoherences.pngpartialALSbudget.zip 
  15613   Mon Oct 5 14:01:41 2020 gautamUpdateElectronicsaLIGO demod boards stuffed and deliveredWe received 20pcs of stuffed
demodulator
boards from Screaming Circuits today.
 IMG_8888.JPG 
  7189   Wed Aug 15 10:40:16 2012 DenUpdateCDSaa filtersThe lack of AA filter for MCL signal is
RFM model strongly disturbed entering to
OAF signal
 aa.png 
  9786   Mon Apr 7 15:26:32 2014 jamie, ericqUpdateCDSaborted attempt to update c1sus machine with second CPUThis morning we attempted to replace the
c1sus front end machine with a spare that
had been given a second CPU, and therefore
 Screenshot-Untitled_Window.png 
  5670   Sat Oct 15 16:01:26 2011 kiwamuUpdateIOOabout LOCKIN module

    

       
            
  
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