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  40m Log, Page 57 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  8686   Thu Jun 6 15:46:10 2013 Max HortonSummaryGeneral Smart UPS 2200 Batteries ReplacedReplaced the batteries successfully in
the control room.  We just had to switch
the clips from the old batteries to the new
  
  8694   Tue Jun 11 22:16:56 2013 ManasaSummaryGreen LockingALS for X armI discussed with Yuta about the ALS servo
and phase tracker and found that there was
a lot of information lying around from last
  
  8703   Thu Jun 13 22:31:12 2013 ManasaSummaryGreen LockingX arm ALSStabilized ALS
and beat frequency sweep realized.
 IMG_0659.JPGALS_stabilized_13June2013.png 
  8708   Fri Jun 14 07:06:19 2013 KojiSummaryGreen LockingX arm ALSIt's nice that we are now able to scan
the cavity again. We got close to PRMI+one
arm one step further.
  
  8717   Tue Jun 18 10:37:00 2013 SteveSummaryGeneralnew laser pointers  Red-green
laser pointers added to the depleted
stock of 2011
  
  8738   Mon Jun 24 16:06:17 2013 ManasaSummaryGreen LockingALS model I am working on the basic
ALS servo model. The simulink model for the
same is attached. The loop is not yet complete
 elog.zip 
  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 
  8776   Thu Jun 27 22:52:38 2013 Rana, Gabriele, FrancescoSummaryComputer Scripts / ProgramsLIGO-DV installedI installed ligoDV in the /ligo/apps/ligoDV/
Now, by pointing the tool at the
local NDS2 server (megatron:31200) you can
 ldv.png 
  8795   Wed Jul 3 11:07:17 2013 AlexSummary Photodetector Characterization [Alex, Koji]
We characterized Koji's BBPD
MOD for REFL165 (see attachment).
 BBPD_PCB.pdftransimpedance_measurement.pdf 
  8797   Wed Jul 3 14:33:46 2013 KojiSummaryLSCTest result for the REFL165 photodetectorP.1 Circuit diagram
Added components are indicated by
red symbols.
 REFL165_response_130702.pdf 
  8816   Tue Jul 9 23:27:17 2013 KojiSummaryLSCMICH: ITMX/Y <=> PRM/BSThe MICH actuation with PRM/BS was investigated
again.
(ITMX -1 / ITMY +1) is equivalent
  
  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 
  8885   Fri Jul 19 23:35:52 2013 KojiSummaryLSCTRY DC lockingThe
Y arm was locked with the TRY DC signal.
The
 TRY_locking.png 
  8887   Mon Jul 22 03:10:41 2013 ranaSummaryloreAngel of the Y End Table? Trying to take an image or movie
of the ETMY Transmon cam, we got instead
this attached image.
 asdasd.jpg 
  8888   Mon Jul 22 06:58:17 2013 LisaSummaryloreAngel of the Y End Table?

    

       
            
 image.jpg 
  8905   Tue Jul 23 13:29:58 2013 KojiSummaryGeneral record of the initial state  initial_state_130723.png 
  8987   Thu Aug 8 18:43:12 2013 SujanSummaryPEMOptimally subtracting signals from two seismometers.An exercise of optimally subtracting one
seismometer signal by  another using weiner
filters was done. Results have been summarized
 Results.pdf 
  8988   Thu Aug 8 18:47:41 2013 SujanSummaryPEMUsing weiner filters for subtracting signals MC_L and GUR2_XI used MC_L signal from the Mode Cleaner
as the desired signal with  GUR2_X as witness
signals. I observed good subtraction where
 Results.zip 
  9004   Tue Aug 13 11:40:19 2013 Alex ColeSummaryElectronicsRFPD Demod Filter Frequency Response Measurement For the RF PD Frequency Response
Measurement project, we get each PD signal
from the "PD RF Mon" output of
 photo_(3).JPGtest.jpg 
  9009   Tue Aug 13 21:49:32 2013 KojiSummaryGeneralTesting new AG4395A network analyzerNew AG4395, sn MY41101114  for West
Bridge Labs was delivered. For the test purpose
it is at the 40m now.
 AG4395A_noise.pdf 
  9010   Tue Aug 13 22:21:12 2013 KojiSummaryGeneralMinicircuit Filter TFs (AG4395A test)As a part of the network analyzer test
in the previous entry, the transfer functions
of Mini-Circuits filters we have at the 40m
 Minicircuit_LPF.pdfMinicircuit_BPF.pdfMinicircuit_HPF.pdf130813.zip 
  9012   Thu Aug 15 01:51:50 2013 KojiSummaryGeneralRFM<->Dolphin bridge distributed to c1rfm and c1mcsSince the RFM-Dolphin bridges for the ASX
model was added to the c1rfm model, c1rfm
kept timing-out from the single sample time
  
  9021   Sun Aug 18 16:04:07 2013 ranaSummaryCDSFB lights all RED: mxstream restartSun Aug 18 15:52:50 2013
Found the FB lights (C1:FEC-NN_FB_NET_STATUS
and C1:DAQ-DC0_C1XXX_STATUS) RED for everything
 IFO-Trend.png 
  9022   Sun Aug 18 17:56:16 2013 ranaSummaryCDSMEDM Screen CPU UsagesI noticed at LLO (?) that the LSC screen
there uses up ~25-30% of the CPU time on
a single core for the control room iMac workstations
 obama1404_666531c.jpg 
  9042   Tue Aug 20 16:23:41 2013 ranaSummaryGeneral/home/cds nearly full/home/cds is >98% full - below are some
of the usage numbers:
  
  9044   Wed Aug 21 00:18:03 2013 MasayukiSummaryGreen LockingX-arm PDH OLTF measurement[Manasa Masayuki]
Today we measured the openloop transfer
function of the PDH green lock of the x-arm.
 IMG_1226.JPGIMG_1228.JPG 
  9045   Wed Aug 21 17:42:03 2013 ranaSummaryGeneral/home/cds nearly fullOne of the reasons that our disk is getting
full is due to the scripts_archive directory.
A backup script runs on op340m and makes
  
  9047   Wed Aug 21 19:37:25 2013 MasayukiSummaryGreen LockingX-arm PDH OLTF measurement[Manasa, Masyauki]

Today we measured OLTF of PDH green
 OLTF_PDH_Glock_6_5_2.png 
  9054   Thu Aug 22 20:25:28 2013 MasayukiSummaryGreen LockingY-arm PDH OLTF measurement[Manasa, Masayuki]
We measured the the openloop transfer
function of the PDH green lock of the y-arm.The
 OLTF_PDH_Glock_yarm_7.png 
  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 
  9123   Wed Sep 11 23:34:37 2013 MasayukiSummaryGreen LockingALS locking in both arms[manasa, masayuki]
We locked the XARM and YARM with
using ALS control loop and
 noise.pdf 
  9124   Wed Sep 11 23:43:10 2013 KojiSummaryGreen LockingALS locking in both armsWhat was the beat freq for each arm?
The HF noise level depends on the
frequency of the beat note.
  
  9125   Thu Sep 12 00:07:26 2013 MasayukiSummaryGreen LockingALS locking in both arms

    

       
            
  
  9147   Fri Sep 20 20:14:52 2013 ranaSummaryGeneral/home/cds nearly full

    

       
            
  
  9156   Tue Sep 24 20:43:45 2013 masayukiSummarySUSoptical levers centeringI centered optical levers of ITMX,BS,ETMY.
I also change the position of optical levers
of ITMX, ETMY, ITMY, BS on Friday night(9/21),
 Screenshot-Untitled_Window.pngScreenshot-Untitled_Window-1.png 
  9158   Wed Sep 25 08:11:01 2013 MasayukiSummaryLSCLSC calibration screen 
  
 plot.pdfScreenshot.pngScreenshot-1.pngfringe.pdf 
  9161   Wed Sep 25 23:15:11 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM lockingI measured some error signal, OLTFs and
responses for FPMI noise estimation. Especially
we are interested in the noise from in-loop
 fpmibd.pdf 
  9162   Wed Sep 25 23:59:29 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM locking 
Measurement
 XARM_OLTF.pdfYARM_OLTF.pdfXARM_ITMXresponse.pngYARM_ITMYresponse.pngfree_running.pdf 
  9163   Thu Sep 26 01:49:28 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM locking 
 Measurement
 MICH_OLTF.pdfBS-RS55Q.pngETMX-RS55.pngETMY-RS55.pngplot.pdf 
  9182   Tue Oct 1 14:12:22 2013 ranaSummaryCDSsvndumpfilter on linux1 makes NFS slow Yesterday and this morning's slow
NFS disk access was caused by 'svndumpfilter'
being run at linux1 to carve out the Noise
  
  9184   Tue Oct 1 19:42:19 2013 ranaSummaryCDSmegatron upgradeMax and
I started upgrading megatron to Ubuntu 12.NN
today. We were having some troubles
  
  9191   Thu Oct 3 02:43:34 2013 rana, jenneSummaryLSCPRMI: comparison of 1f and 3f signals w/ calibrationThe attached plot shows the spectra of
all the REFL signals with the PRMI SB lock.
We excited the ITMY_LSC with 3000
 REFL_signals_CalLinesLinedUp.pdf 
  9205   Sun Oct 6 17:05:49 2013 ranaSummaryIOOMC ASC problemsMC unlocked over the weekend and also got
severely mis-aligned. It all started around
midnight on Saturday.
 mcasc.pdf 
  9207   Sun Oct 6 20:55:08 2013 ranaSummaryASCMC WFS Limits set based on 40 days of trendsMC3 watchdog gets tripped sometimes when
lock is lost. I noticed that there were no
limits set in the MC WFS drive. The attached
 mcwrfs_trend.png 
  9216   Mon Oct 7 18:32:01 2013 John ZweizigSummaryComputer Scripts / Programsnds2 installed, restartedThe upgrade of megatron broke the nds2
service. I have fixed things by
  1) installing the latest version
  
  9218   Mon Oct 7 18:39:29 2013 JenneSummaryLSCPRMI: REFL11 beam realigned

    

       
            
  
  9324   Thu Oct 31 21:22:00 2013 rana, kojiSummaryIOOmodulation beat note in MC servoI hooked up the 4395 to the MC servo board
test out (TP2A) and looked at the spectrum
using our new SPAG4395.py script. We noticed
 13031.png13031_200.png13031_200b.png 
  9326   Fri Nov 1 17:01:46 2013 GabrieleSummaryLSCSimulation of REFL_3f signal when the arms come in I simulated how the 3f signal is
affected by the resonance condition of the
arms.
 refl_3f_I_vs_cavity_tuning_noresf2.pngrefl_3f_I_vs_cavity_tuning.png 
  9327   Fri Nov 1 17:44:06 2013 KojiSummaryLSCSimulation of REFL_3f signal when the arms come inYes, the resonance of the 2nd-order sidebands
to the IFO screws up the 3f scheme.
2f (~22MHz) and 10f (~110MHz) are
  
  9332   Sun Nov 3 00:05:52 2013 CharlesSummaryISSISS Update - Bout' timeRight near the end of summer, I had an
ISS board that was nominally working, but
had a few problems I couldn't really sort
 full-op-loop.pngfull-cl-loop.pngreq-vs-meas.png 
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