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ID Dateup Author Type Category Subject Text Attachments
  8199   Thu Feb 28 05:54:54 2013 yutaUpdateRF Systemphase tracker: calibrationI swept the frequency of RF input to the
beatbox to calibrate and check linearity
range of phase tracker.
 ALS-BEATX_FINE_PHASE_OUT.pngALS-BEATY_FINE_PHASE_OUT.png 
  8200   Thu Feb 28 06:51:17 2013 yutaUpdateRF Systemphase tracker: noise levelI measured noise level of the phase tracker
by inputting constant frequency RF signal
from marconi.
 frequencynoise.png 
  8201   Thu Feb 28 14:19:20 2013 Max HortonUpdateSummary PagesMultiprocessing ImplementationOkay, more memory would definitely be good. 
I don't think I have been using MEDM (which
Jamie tells me is the controls interface)
  
  8202   Thu Feb 28 14:51:43 2013 JenneUpdatePEM"Rock Monster" causing low frequency noiseManasa and I have been wondering why the
low frequency seismic noise has been different
in the last few days/weeks.  I went
 RockMonsterOn_ForFewMinutes.png 
  8203   Fri Mar 1 01:17:06 2013 JenneUpdateLSCXarm oscillationThere is an oscillation in the Xarm at
631Hz, which is not in the Yarm.  There
is a small peak in POY11_I at this frequency,
 POX11_630Hz_osc.pdf 
  8204   Fri Mar 1 02:49:34 2013 JenneUpdateASSArm A2L measurementI haven't finished debugging the scripts
so that the measurement is fully automatic,
like the MC, but I did measure the arm spot
 QUAD1_1046168242.bmp 
  8205   Fri Mar 1 08:19:40 2013 SteveUpdateASSdrift Early morning drift in pitch. This
plot is meaningless because there is no real 
light on IP-Ang
 drift.png 
  8206   Fri Mar 1 14:50:36 2013 SteveUpdateVACpumpdown day 8 Atm1, RGA background scan with TP3
pumping at day 7
Atm2,  IFO  CC1 = 1.1e-5
 bgTP3d7.pngRGAonIFO.png 
  8207   Fri Mar 1 16:37:45 2013 BrettUpdateSUSGlobal Damping UpdateBrett and Kamal
The global damping testing for the
week is now complete. The c1sus.mdl simulink
 GlobalDamp_Simulink.pngGlobalDampScreens.png 
  8208   Fri Mar 1 16:58:37 2013 yutaUpdateLSCXarm oscillation stoppedPOX11 oscillation at 630 Hz was stopped
by installing 630 Hz resonant gain to LSC_XARM.
After few hours, oscillation stopped.
 POX11_630Hz.png 
  8209   Fri Mar 1 18:23:28 2013 JamieUpdateComputer Scripts / Programsupdated version of "getdata" I updated the getdata script so that it
can now handle downloading long stretches
of data.
  
  8210   Sat Mar 2 00:09:31 2013 ranaUpdateLSCXarm oscillation stopped  Don't use resonant gain - it
can lead to a loop instability since it makes
the loop have 3 UGFs.
  
  8211   Sat Mar 2 00:23:19 2013 ranaSummaryCOCPhase Maps measured of the ATF flat mirrorsI took the two 'flat' 2" mirrors over
to Downs and Garilynn showed me how to measure
them with the old Wyko machine.
 0966_0997_phasemap.pdf 
  8212   Sat Mar 2 05:53:15 2013 yutaUpdateLSCstable lock of PRMII tuned alignment, gains and filters to
achieve stable lock of PRMI.
It now locks quite stably with UGF
 LSCMICHOLTF_PRMI.pngLSCPRCLOLTF_PRMI.pngPRMtoAS55REFL55.png 
  8213   Sat Mar 2 14:52:02 2013 ranaUpdateLSCstable lock of PRMI  Whereas
the sensing matrix coefficients for ITMX/ITMY
  
  8214   Sat Mar 2 20:09:12 2013 yutaUpdateRF Systemphase tracker: DAQ noise limited[Koji, Yuta]

We found that our phase tracker noise
 frequencynoisewhitening.png 
  8215   Sun Mar 3 22:16:46 2013 JenneUpdateLSCLSC whitening triggering started[Jenne, Annalisa]
We have started working on writing
the c-code to parse the LSC input matrix,
  
  8216   Mon Mar 4 09:51:26 2013 SteveUpdateASSIP-ANG is still not real  IP-ANG  is coming out of ETMY
without clipping. The beam is very high on
the pick off mirror at the end table but
 IP-ANG.png 
  8217   Mon Mar 4 09:55:33 2013 ranaUpdateLSCLSC whitening triggering started  How about posting a logic flow
diagram? Is the idea to trigger only on the
power signals to determine the lock state?
  
  8218   Mon Mar 4 10:41:18 2013 Max HortonUpdateSummary PagesMultiprocessing ImplementationUpdate:
Upon investigation, the other methods
besides process_data() take almost no time
  
  8219   Mon Mar 4 11:30:47 2013 SteveUpdatePEMair cond problem 
 The air cond is out of order
at the area covered by racks 1 X 1 
 40dAC.png 
  8220   Mon Mar 4 16:26:45 2013 BrettUpdateSUSGlobal Damping Noise MeasurementHere is an amplitude spectrum plot of y-arm
cavity noise with a 50 Hz cutoff damping
filter of the form zpk(0,[50;50],1). The
 YARM_Noise.png 
  8221   Mon Mar 4 16:46:31 2013 yutaUpdateSUSoplev calibration for PRM[Manasa, Sendhil, Yuta]

We calibrated oplev for PRM. Calibration
 PRM_PIT.pngPRM_YAW.png 
  8222   Mon Mar 4 17:32:26 2013 yutaBureaucracyGeneralflowchart for PRMI g-factor measurementI made a very useful flowchart for the
week. Our goal for the week is to measure
g-factor of PRC in PRMI.
 PRMIgfactorPlan.png 
  8223   Mon Mar 4 18:11:10 2013 JamieUpdateSUSCleaning up suspension POS inputsI did a little bit of cleanup of the suspension
POS inputs today, both in model and MEDM
land.
 SUS_ETMX_POS.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)
  
  8225   Mon Mar 4 19:52:03 2013 Jamie, YutaUpdateGeneralinput pointing mirror (TT1/TT2) control improvedWe improved the active tip-tilt (TT) controllers
such that they now have filter banks at the
PIT/YAW inputs, and at the coil outputs:
 TT.png 
  8226   Mon Mar 4 20:03:42 2013 AnnalisaHowToCOMSOL TipsStudy of mirror mount eigenfrequencies I studied the eigenfrequencies of
a mirror mount designed with COMSOL.
I imposed fixed constraints for the
 MirrorSupport1.pngMirrorSupportEig1.pngpedestal.pngBase2.png 
  8227   Mon Mar 4 21:05:49 2013 Max HortonUpdateSummary PagesMultiprocessing and CrontabMultiprocessing:  In its current
form, the code uses multiprocessing to the
maximal extent possible.  It takes roughly
  
  8228   Tue Mar 5 00:24:52 2013 ManasaConfiguration40m UpgradingEndtable upgrade for auxiliary green laser : customized mount Drawing of customized mount for endtable
doubler crystal (PV40+PVP2+NP9071) modified
and updated on the endtable upgrade wiki
  
  8229   Tue Mar 5 01:43:04 2013 JenneUpdateASSArm A2L measurement script finishedIn either .../scripts/XARM or ...../scripts/YARM
run either A2L_XARM or A2L_YARM.
The wrapper script will, like the
 YARMdecenter.png 
  8230   Tue Mar 5 06:27:14 2013 yutaUpdateLSCintra-cavity power dependence on mirror misalignmentI measured intra-cavity power dependance
on mirror misalignment.
Intra-cavity
 PRM_PIT_20130305a.pngPRM_YAW_20130305b.pngITMX_YAW_20130305.pngITMY_YAW_20130305.png 
  8231   Tue Mar 5 14:59:32 2013 SteveHowToVACdry-forepump replacedTP3 turbo pump's dry-foreline pump was
replaced.
How to do it:
 changingforepump.pngTP3wFp600.jpg 
  8232   Tue Mar 5 17:09:30 2013 yutaUpdateSUSoplev calibration for ITMY[Manasa, Sendhil, Yuta]

We calibrated oplev for ITMY. Calibration
 ITMY_PIT.pngITMY_YAW.png 
  8233   Tue Mar 5 17:23:06 2013 ChloeUpdate QPD Adding/Subtracting CircuitToday I finished building the adding/subtracting
circuit for the QPD and tested that the QPD
could see a laser moving across its visual
  
  8234   Tue Mar 5 18:36:27 2013 JenneUpdateLSCLSC whitening triggering startedMore effort at debugging the LSC whitening. 
Today I tried moving things over
to the c1tst model, which runs on the y-end
  
  8235   Tue Mar 5 23:00:08 2013 yutaUpdateLSCYarm and PRC g-factor from misalignment measurementI fitted intra-cavity power dependance
on mirror misalignment plot with parabola
to get the g-factor.
 ITMY_YAW_20130305_DC.pngPRM_PIT_20130305a_DC.pngPRM_YAW_20130305b_DC.png 
  8236   Tue Mar 5 23:37:11 2013 yutaUpdateSUSPRM angular motion spectraI measured PRM angular motion spectra (in
daytime today).
PRM angular motion is 
 PRMangularmotion.png 
  8237   Wed Mar 6 02:46:20 2013 ManasaUpdateLSCPRMI locking for g-factor measurement [Yuta, Manasa]
PRMI alignment procedure for carrier
 locking has been kept the same except that
 POPDCspec_PRMIlocked.png 
  8238   Wed Mar 6 08:40:03 2013 SteveUpdateVACfirst scan of this pumpdown Pumpdown 75 - Maglev - day 12
Precondition: 66 days at atm, installed
TIP-TILTs with coils that  replaced
 pd75m12d.pngpd75mRGA12d.png 
  8239   Wed Mar 6 09:44:29 2013 KojiUpdateLSCPRMI locking for g-factor measurement- What about normalizing POPDC to indicate
the carrier recycling gain?
- When you align the PMC, confirm
  
  8240   Wed Mar 6 11:33:09 2013 steveUpdateSAFETYsafety audit 2013 
         
           
 IMG_0010.JPG 
  8241   Wed Mar 6 16:14:27 2013 SteveUpdateSAFETYsafety trainingChloe Ling, Max Horton and Annalisa Allocca
have received basic 40m specific safety training.
 IMG_500.jpg 
  8242   Wed Mar 6 18:14:33 2013 ManasaSummaryLSCCalibration of BS, ITMX and ITMY actuators[Yuta, Manasa]

Measured
 MICHerrCalibration.pngMICHerrCalibration.pngMICHOLTF.pngactcalibITMBS.png 
  8243   Wed Mar 6 18:27:24 2013 JamieUpdateGeneralnow recording input TT channels to frames, but why no autoburt?I spent some time trying to figure out
how to get a record of the pointing of the
input pointing tip-tilt (TT) channels.
  
  8244   Wed Mar 6 18:51:07 2013 AnnalisaUpdateAlignmentAuxiliary laser installed for FSR and TMS measurement of the PRCWe want to measure the g-factor of the
PRC using the beat note of the main laser
with an auxiliary NPRO laser.
 IMG_3-6-13.JPG 
  8245   Wed Mar 6 20:21:34 2013 JamieUpdateGeneralBeatbox pulled from rackI pulled the beatbox
from the 1X2 rack so that I could try to
hack in some output whitening filters. 
 2013-03-06-195232_1060x927_scrot.png 
  8246   Wed Mar 6 21:58:39 2013 JenneUpdateElectronicsPOX whitening was fine all alongAfter my investigations this afternoon
(with help from Sendhil and Shivaraj), 
  
  8247   Wed Mar 6 22:11:19 2013 KojiUpdateElectronicsPOX whitening was fine all alongAt the time you, den and I worked together,
we could not lock the X-arm on TEM00 with
the FM1s of the POX11 on.
  
  8248   Thu Mar 7 01:43:35 2013 yutaUpdateLSCcalibrated MI differential length spectraFree swing MI differential length is 86 nm
RMS and residual length when locked
 LSCMICHOLTF_MI.pngMImotion.png 
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