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ID Date Author Type Category Subject Text Attachments
  8260   Fri Mar 8 16:02:52 2013 JenneUpdateAlignmentGetting closer to beam centering on YarmI'm working on getting the input beam centered
on the Yarm optics.  To do this, I measured
the spot positions, move the tip tilts, realign
 YARMdecenter_zoom_8Mar2013.png 
  8259   Fri Mar 8 15:27:42 2013 yutaUpdateGreen LockingPSL green shutter installed[Manasa, Yuta]

Mechanical shutter for PSL green is
  
  8258   Fri Mar 8 13:42:35 2013 JenneUpdateABSLBS installed on ITMY tableRe:  POY beam reduction.
We are able to lock the Yarm with
the beam / gain as it is.  I had thought
  
  8257   Fri Mar 8 12:57:57 2013 AnnalisaUpdateABSLBS installed on ITMY table Sendhil and I installed the S polarized
BS on the ITMY table to steer the NPRO beam
through the AR wedge and align it to the
  
  8256   Fri Mar 8 03:07:19 2013 yutaUpdateLSCcalibrated PRM-ITMY length spectraMeasured free swing PRM-ITMY length was
230
nm RMS.
 LSCPRCLOLTF_PRITMY.pngPRITMYmotion.png 
  8255   Fri Mar 8 02:17:04 2013 yutaUpdateLSCcalibration of PRM actuator[Manasa, Yuta]

We measured AC response of PRM actuator
 calibREFL55Q.pngactcalibPRM.pngOLTF_PRCL.png 
  8254   Thu Mar 7 18:48:43 2013 yutaUpdateComputer Scripts / Programsreleasing my secret scriptsI released/updated my secret scripts to
real scripts directory.
I checked they run correctly (but
  
  8253   Thu Mar 7 18:41:03 2013 JenneUpdateElectronicsPOX whitening was fine all alongHere are the transfer functions that we
took back in 2011 (see elog
4915 and replies) for POX:
 POX11I.pngPOX11Q.png 
  8252   Thu Mar 7 18:12:03 2013 yutaUpdateAlignmentInput beam drift ~ 0.1 mrad/h in pitch[Jenne, Manasa, Yuta]

We temporarily centered the beam on
 IPangulardrift.png 
  8251   Thu Mar 7 16:55:28 2013 KojiUpdateLockingErudite discussion on PRMI lockingPRMI for the sidebands may have different
situation. Investigate our wiki to find our
the simulation result.
  
  8250   Thu Mar 7 12:39:12 2013 JenneUpdateLockingErudite discussion on PRMI locking[Rana, Jenne, Yuta] (late last night)
After some trouble getting the PRMI
to lock with REFL55 I&Q last night, we
  
  8249   Thu Mar 7 11:43:15 2013 JenneUpdateElectronicsPOX and POY whitening DC gain left lowManasa and Jan were having trouble locking
the Yarm, and asked me to take a look at
it.  After a good long time of trying
  
  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 
  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.
  
  8246   Wed Mar 6 21:58:39 2013 JenneUpdateElectronicsPOX whitening was fine all alongAfter my investigations this afternoon
(with help from Sendhil and Shivaraj), 
  
  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 
  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 
  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.
  
  8242   Wed Mar 6 18:14:33 2013 ManasaSummaryLSCCalibration of BS, ITMX and ITMY actuators[Yuta, Manasa]

Measured
 MICHerrCalibration.pngMICHerrCalibration.pngMICHOLTF.pngactcalibITMBS.png 
  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 
  8240   Wed Mar 6 11:33:09 2013 steveUpdateSAFETYsafety audit 2013 
         
           
 IMG_0010.JPG 
  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
  
  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 
  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 
  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 
  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 
  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
  
  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
  
  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 
  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 
  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 
  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 
  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
  
  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
  
  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 
  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 
  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)
  
  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 
  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 
  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 
  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 
  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 
  8218   Mon Mar 4 10:41:18 2013 Max HortonUpdateSummary PagesMultiprocessing ImplementationUpdate:
Upon investigation, the other methods
besides process_data() take almost no time
  
  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?
  
  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 
  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,
  
  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 
  8213   Sat Mar 2 14:52:02 2013 ranaUpdateLSCstable lock of PRMI  Whereas
the sensing matrix coefficients for ITMX/ITMY
  
  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 
  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 
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