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ID Date Authorup Type Category Subject Text Attachments
  8357   Tue Mar 26 17:27:17 2013 KojiUpdateIOOTuning MC length/FSRPlease add the discussions on the cavity
absolute length (and its change, adjustment
precision),
  
  8388   Tue Apr 2 11:08:16 2013 KojiUpdateLSCPRMI lock> The two REFL55 signals
Wow! It's a good news.
I think this is our first ever lock
  
  8406   Wed Apr 3 18:27:03 2013 KojiUpdate QPD Voltage RegulatorsBreadboards may not be suitable for a reliable
work. Why don't you switch to any protoboard
and real soldering?
  
  8413   Thu Apr 4 10:46:54 2013 KojiSummaryLSCREFL55 error signalsBeautiful double peaks. I don't see the
triple zero-crossings. Is this because you
adjusted the phase correctly (as predicted)?
  
  8468   Mon Apr 22 11:26:25 2013 KojiConfigurationCDSsome RT processes restartedWhen I came to the 40m, I found most of
the FB signals are dead.
The suspensions were not dumped but
  
  8469   Mon Apr 22 11:46:09 2013 KojiSummaryIOOMC locked/aligned. MC WFS offloading by ezcaservoЕру ьс шы
тщц дщслув
фтв фдшптувю
  
  8470   Mon Apr 22 12:03:58 2013 KojiUpdatePSLPMC aligned tooPMC aligned. C1:PSL-PMC-PMCTRANSPD improved
from 0.72ish to 0.835ish.
  
  8482   Wed Apr 24 00:44:33 2013 KojiUpdateSUSPRMI locked, ITMX pitch OpLev ringing upI tried to reproduce the locking situation
described in this
entry tonight.
  
  8483   Wed Apr 24 14:20:49 2013 KojiUpdateCDSFE Web view not updated?The FE web view seems not up-to-date, does
it? ( maybe for a year)
https://nodus.ligo.caltech.edu:30889/FE/c1mcs_slwebview_files/index.html
  
  8487   Wed Apr 24 18:51:12 2013 KojiConfigurationoptical tablesPD frequency responseThe fibers should be routed beneath the
electrical cables. 
They should be fixed on the table
  
  8491   Thu Apr 25 10:19:10 2013 KojiSummaryLSCLocking activity on Apr 24thLast night I worked on the several locking
configurations:
  
  8493   Thu Apr 25 18:58:06 2013 KojiConfiguration PD frequency responseNo.... what I told was to put the roll
next
to the splitter, 
  
  8494   Thu Apr 25 20:48:48 2013 KojiUpdateASSDen fixed the Yarm ASS scriptsI contacted Den about malfunctioning of
the Yarm ASS.
He found the scripts were modified
  
  8500   Sat Apr 27 00:21:06 2013 KojiUpdateLSCLocking activity on Apr 26thWhen I talked with Den via phone, he recommended
to use the trigger and normalization with
POP110I.
 Screenshot.png 
  8501   Sat Apr 27 00:29:40 2013 KojiUpdateLSCLSCoffset script fixedPrior to the locking trials...
scripts/LSC/LSCoffset script
  
  8508   Mon Apr 29 22:13:41 2013 KojiUpdateLSCLocking with ASDCToday the locking was not as easy as that
was last Friday.
So I tried something new. Today Rana
 Screenshot.png 
  8509   Mon Apr 29 23:02:48 2013 KojiConfigurationLSCQuestonsQ. How much Schnupp asymmetry we want in
order to improve the signal ratio between
PRCL/MICH in REFL ports?
  
  8517   Wed May 1 00:05:03 2013 KojiUpdateLSCMore stable lock of PRMI (REF33I and AS55Q)[Jenne Koji]
- Today the spots were moving more
than the usual. The OPLEV screens showed
 Screenshot.png 
  8521   Thu May 2 00:34:57 2013 KojiUpdateLSClocking- Routine alignment
Locked the arm cavties. Ran ASS.
As this was not enough precise alignment
 Screenshot.pngScreenshot2.pngScreenshot3.png 
  8525   Fri May 3 01:24:25 2013 KojiUpdateASSDen fixed the Yarm ASS scriptsOutput matrices are added to ASS. Currently
ASS is based on the mirror bases.
I prefer to have the actuator bases
  
  8535   Tue May 7 10:30:32 2013 KojiUpdateLockingPRM yaw responsible for RIN

    

       
            
  
  8539   Tue May 7 17:30:28 2013 KojiUpdateRF SystemIdeal PRMI RF frequencyTo change the MC length is not the point.
If we can improve the length sensing
by the intentional shift of the modulation
  
  8547   Tue May 7 23:03:12 2013 KojiConfigurationCDSCDS workSummary:
c1rfm / c1lsc / c1ass / c1sus were
  
  8552   Wed May 8 18:33:02 2013 KojiUpdateASSYARM ASS - faster and more precise convergencePrecise arm alignment is more demanded.
as the PRMI locking requires good and reliable
alignment of the ITMs.
 YARM_ASS.pngScreenshot.png 
  8554   Wed May 8 22:36:42 2013 KojiUpdateASSXARM ASS (YARM ASS - faster and more precise convergence)Same ASS setup for the X arm has been
done.
Now
 XARM_ASS.png 
  8562   Sat May 11 01:11:52 2013 KojiUpdateASCPRC mode stabilization with a shadow sensor at POPAh, AWESOME.
Indefinite PRMI lock was finally achieved.
 Screenshot.png130510_PRMI.pdf 
  8566   Mon May 13 23:05:26 2013 KojiConfigurationLSCPRMI locking- Disabled MCL path in mcdown/mcupscript.
Nominal gain in mcdown/mcup was -50
and -100 respectively.
 130513_PRC_ASC.pdf130513_PRC_ASC_servo.pdf 
  8570   Tue May 14 02:19:13 2013 KojiUpdateGreen LockingXend Green tweakedNote that I'm supposed to return one of
the two green beat PDs and the power supply.
  
  8574   Tue May 14 20:27:19 2013 KojiConfigurationLSCOpenloop gain for PRMI lock May 13The OLTFs for PRCL and MICH for the last
night's lock were modelled using Yuta's python
script.
 LSCPRCLOLTF.pngLSCMICHOLTF.png130513.zip 
  8591   Thu May 16 11:50:25 2013 KojiConfigurationElectronicsMeasurement and empirical models of the AI board TFsYesterday, I pulled out the AI board
for the PRM/BS SUSs. (After the investigation
it was restored)
 D000186AD_TF.pdfD000186AD_TF.zip 
  8592   Thu May 16 22:03:16 2013 KojiConfigurationLSCY Green BBPD returned to the PSL tableI borrowed the GTRY BBPD  for the
REFL165 trial before.
Now the PD is back on the PSL table.
  
  8599   Fri May 17 19:56:52 2013 KojiSummaryCDSWeird DAC bit flipping at half integer output valuesLet me make a complimentary comment on
this effect.
Because of this oscillation feature,
  
  8601   Mon May 20 18:47:47 2013 KojiUpdateLSCPRMI sensing matrix - not high quality dataFor now forget about the demodulation phase
and assume all of the ports are independent.
  
  8611   Wed May 22 00:08:19 2013 KojiUpdateLSCSensing matrix scripts modified to include actuator calibrationIt
was too embarassing to see that the actuation
frequency was set at the violin mode frequency
  
  8612   Wed May 22 00:42:13 2013 KojiSummarySUSviolin QWhile looking at the decay of the violin
mode of the PRM, I made a simple measurement
of the decay rate.
  
  8614   Wed May 22 11:21:28 2013 KojiSummaryCDSWeird DAC bit flipping at half integer output valuesIs this limit cycle caused by the residual
of the digital AI filtering at the half sampling
freq and that his the threshold?
  
  8616   Wed May 22 15:08:37 2013 KojiSummaryCDSWeird DAC bit flipping at half integer output valuesIt seems that the effect is from the (linear)
residual fluctuation of the digital AI filter
for the zero-padded signal.
 Screenshot.png 
  8629   Thu May 23 13:14:34 2013 KojiSummaryLSCXarm beat note search continuesWe should consider to hook up the temperature
monitors of the NPROs to the ADCs.
  
  8631   Thu May 23 17:51:39 2013 KojiSummaryLSCMy usual locking procedureFor purpose of the automation and my record,
I summarized my locking procedure as a chart.
 PRMI_locking_procedure.pdf 
  8636   Thu May 23 22:13:12 2013 KojiUpdateLSCPRMI sensing matrix measured at 580.1HzCan you clarify the definition of the phase
"0deg" of your plot?
Is "I" the definition of
  
  8638   Fri May 24 11:38:00 2013 KojiUpdate40m upgradingETMY - Mode Matching for greenI got confused. Is the mode calculation
in the cavity correct? 
Are you sure the wavelength in the
  
  8641   Fri May 24 14:01:59 2013 KojiUpdateLSCPRMI sensing matrix measured at 580.1HzIt's hard to believe but is AS55Q really
almost insensitive to MICH?
Well, anyway, now it is the time
  
  8650   Tue May 28 17:06:04 2013 KojiUpdateLSCPRMI sensing matrix: Got it!- We want to add POX11/POY11 in the collection.
They may indicates some abnormal asymmetry
between two arms (for PRMI).
  
  8690   Fri Jun 7 23:44:54 2013 KojiUpdateGeneralProjector - lightbulb replacedhttp://nodus.ligo.caltech.edu:8080/40m/7885   
  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.
  
  8716   Tue Jun 18 07:22:20 2013 KojiUpdateLSCSensing Matrix vs. Schnupp AsymmetryInteresting.
What's the reason why the PRMI/MICH
ratio gets worse (larger) for 55MHz and 165MHz
  
  8723   Wed Jun 19 04:56:07 2013 KojiUpdateASCmodel name ASS -> ASC ???Sounds good. 
Or we just stuff any angle control
things in to Angular Stabilization System
  
  8744   Tue Jun 25 11:39:13 2013 KojiUpdateLSCArm Cavity scan with X-ALS after ALS servo upgradeMy understanding is that that number is
an in-loop evaluation of the loop so far
(as the first step of the loop evaluation).
  
  8783   Fri Jun 28 12:15:09 2013 KojiUpdateLSCNeed to measure sensing matrix at REFL165There is no sensible REFL165 PD in the
lab. I am supposed to prepare a new version
of REFL165 using prototype BBPD.
  
  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 
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