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ID Date Author Type Category Subjectup Text Attachments
  1084   Fri Oct 24 11:42:48 2008 AlbertoUpdateGeneralAbs length: locking the X arm cavity in TEM01/10I went back to lock the arm cavity in either
TEM01 or TEM10 mode. Attached are the results.
We still have several resonances which we
 TRX_armTEM00-plot_09-10_together.png 
  1086   Fri Oct 24 17:21:13 2008 AlbertoUpdateGeneralAbs length: the right amount of beam clippingI found the reason why the peak at about 6.3MHz
appeared only on the TEM10 mode: the blade
was clipping the beam too much and it was
 24OCT08_levels_of_clipping_comparison.png 
  1087   Fri Oct 24 18:05:01 2008 AlbertoUpdateGeneralAbs length: transverse mode spacing measured for the X armThe ETMX suffers of astigmatism. I measured
the following frequencies for the higher
order modes:
 24OCT08_TEM10-01_comparison(file12-14).png 
  788   Mon Aug 4 00:56:07 2008 KojiHowToGeneralAbs. Len. Meas. ~ Auto freq scanner with GPIB[B]Work log on August 3rd  - Part1[/B]

o Yesterday I was too much tired of changing
 freq_scan.png 
  556   Tue Jun 24 10:24:43 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Cavity Swing Measurement (2)At the entry 555, Alberto reported the results
of the cavity length measurement using cavity
sweeping.
 armlength.pngarmlength2.png 
  795   Tue Aug 5 00:05:57 2008 KojiUpdateGeneralAbs. Len. Meas. ~ IFR2023A calibration[B]Work log on August 4th[/B]

o IFR2023A (Marconi) was calibrated by the
  
  789   Mon Aug 4 05:23:57 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Measurement for Y-arm completedFinally, I have completed the abs length and
g-factor measurements for Y-arm.
[COLOR=green][B]>>>GO FOR THE VENT<<<[/B][/COLOR]
  
  748   Mon Jul 28 15:54:04 2008 KojiUpdateGeneralAbs. Len. Meas. ~ More on the beat / the PLL setupAlberto and Koji,

Last Friday evening, Koji found that the
 PLL_setup.pngbeat_at_8MHz.jpg 
  782   Sat Aug 2 12:53:43 2008 KojiUpdateGeneralAbs. Len. Meas. ~ New PLL at the PSL table[B]Report of the work last night:[/B]
The new heterodyne interferometer on the
PSL table was built.
 yarm_dc.png 
  796   Tue Aug 5 02:39:55 2008 KojiConfigurationGeneralAbs. Len. Meas. ~ Optical Layout on the AP / PSL table 2008-Aug-05Here are the PDF and the PNG of the AP and
PSL table layouts.
After this photo, the squeezing setup at
 optical_layout_ap_table3.pngoptical_layout_ap_table3.pdfoptical_layout_PSL_table1.pngoptical_layout_PSL_table1.pdf 
  590   Sun Jun 29 02:33:28 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Optical setup (I)I have constructed the beam injection optics
for the abs length measurement.
 optical_configuration.pngoptical_layout_ap_table2.pngoptical_layout_ap_table2.pdf 
  599   Mon Jun 30 05:33:38 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Optical setup (II)o The position of the iris was adjusted so
as not to disturub the beam for OMCR CCD.
  
  567   Wed Jun 25 13:38:22 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Placement of the 700mW NPRO on the AP tableThis morning I have put the 700mW NPRO on
the AP table for the abs length measurement.
 NPRO700mW_placement.jpg 
  787   Mon Aug 4 00:37:58 2008 KojiUpdateGeneralAbs. Len. Meas. ~ RF PD at the Y end / Manual frequency scan[B]Work log on August 2nd[/B]

o Just remind you:
 YEND_LAYOUT.png4th_FSR1.png4th_FSR2.png 
  738   Fri Jul 25 10:48:13 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Realignment / beating / PLL trialAlberto and Koji

o We worked for the abs length measurement
  
  776   Thu Jul 31 11:19:30 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Resonance search trialLast night, I tried to find the resonance
of Yarm by sweeping the frequency of the
injection beam.
  
  793   Mon Aug 4 21:48:24 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Scan for TEM00/01/10[B]Work log on August 3rd  - Part2[/B]

o I tried to measure the frequency of the
 TEM00.pngTEM01.pngknife_edge.png 
  794   Mon Aug 4 22:31:10 2008 KojiUpdateGeneralAbs. Len. Meas. ~ Simple Test for TEM01/10 split[B]Work log on August 3rd - Part3[/B]

[B]Question:[/B]
 TEM01_10.png 
  801   Wed Aug 6 11:10:34 2008 KojiUpdateGeneralAbs. Len. Meas. ~ analysis of the TEM00 scan[B]Analysis of the data on August 3th ~ Part
1[/B]
 TEM00fit.pngTEM00FSRfit.png 
  802   Wed Aug 6 11:43:52 2008 KojiUpdateGeneralAbs. Len. Meas. ~ analysis of the TEM01 scan[B]Analysis of the data on August 3th ~ Part
2[/B]
 TEM01fit.png 
  838   Thu Aug 14 21:52:51 2008 KojiSummaryGeneralAbs. Len. Meas. ~ summary of my SummerI have made the summary of the absolute length
measurement.
It is attached here. The file is a bit big
 mode_spacing_measurement_080816_v2.pdf 
  2328   Wed Nov 25 10:20:47 2009 AlbertoUpdateABSLAbsL PLL not able to lockLast night something happened on the
beat between the PSL beam and the auxiliary
NPRO beam, that spoiled the quality of the
  
  2329   Wed Nov 25 11:02:54 2009 AlbertoUpdateABSLAbsL PLL not able to lock

    
        
  
  2337   Wed Nov 25 20:14:58 2009 AlbertoUpdateABSLAbsL PLL not able to lock: problem fixed

    
        
  
  2422   Wed Dec 16 11:46:25 2009 AlbertoUpdateABSLAbsl PLL Open Loop GainYesterday I measured the Open Loop Gain
of the PLL in the absolute length experiment.
The servo I used was that of the old Universal
 OldBoxOLTF.png 
  2053   Mon Oct 5 14:37:29 2009 AlbertoUpdateABSLAbsolute Length Meaasurement NPRO is onIn the revival of the experiement length
measurement for the recycling cavities, I
turned the auxiliary NPRO back on. The shutter
  
  1115   Wed Nov 5 12:41:36 2008 AlbertoUpdateLSCAbsolute Length and g-factor measurements conclusions[SIZE=4][B][COLOR=green]Absolute Length and
g-Factor Measurement for the 40m Arm Cavities,
Summary of Results[/COLOR][/B][/SIZE]
 2008-11-04_file_02-05.pngHOM_resonances_Xarm.pngHOM_resonances_Yarm.png 
  5100   Wed Aug 3 01:30:04 2011 JenneUpdateLSCAbsolute length of Xarm and Yarm measuredSo far, this is just preliminary, because   
  2889   Thu May 6 18:25:20 2010 JenneUpdatePEMAcc power supply turned onThe accelerometer power supply / preamp
board has been OFF because of exciting new
accelerometer measurements.  It's now
  
  11460   Wed Jul 29 17:51:56 2015 IgnacioUpdatePEMAccelerators moved back to MC1 and MC2We are done taking accelerator huddle test
data. So I moved back all six accelerometers
and cables to MC1 and MC2. I also relabel
 FullSizeRender.jpgFullSizeRender_2.jpg 
  2859   Wed Apr 28 16:15:02 2010 KevinUpdatePSLAccelerometer CalibrationKoji, Steve, and Kevin looked into calibrating
the Wilcoxon accelerometers. Once calibrated,
the accelerometers will be used to monitor
  
  330   Fri Feb 22 02:51:20 2008 AndreyUpdatePEMAccelerometer ITMX seems to be broken
As people probably know,
 Accelerom-EYMX-Feb22.jpgAccelerom-ITMX-Feb22.jpg 
  283   Mon Jan 28 19:35:55 2008 ranaSummaryPEMAccelerometer and Seismometer Coherences[FONT=Arial][COLOR=purple]The attached PDF
shows that there is some strange behavior
at low frequencies.[/COLOR][/FONT]
 Acc.pdf 
  368   Tue Mar 11 23:14:01 2008 ranaConfigurationPEMAccelerometer and Seismometer movementsSteve and Matt moved the accelerometers and
seismometers today. 
The accelerometers are now placed around
 Acc.pdf 
  369   Wed Mar 12 00:36:52 2008 ranaConfigurationPEMAccelerometer and Seismometer movementsI used the MISO FIR Wiener matlab code to
see how well we might do in principle.
 finished.pdf 
  370   Wed Mar 12 00:40:35 2008 ranaConfigurationPEMAccelerometer and Seismometer movementsSame as above but with 2048 taps and a 128
Hz sample rate. Does much better at the 16
Hz bounce mode.
 mc2048-128.pdf 
  371   Wed Mar 12 00:47:26 2008 ranaConfigurationPEMAccelerometer and Seismometer movementsAnd this is a [COLOR=blue]cool snapshot[/COLOR]
showing how this operation used [B][COLOR=red]16
cores[/COLOR][/B] on [SIZE=5][B][COLOR=purple]menkar
 Screenshot.png 
  673   Tue Jul 15 11:47:56 2008 JenneDAQPEMAccelerometer channels in ASS Adapt MEDM screenJenne, Sharon

We have traced which accelerometers correspond
  
  930   Thu Sep 4 18:02:34 2008 rana, josephbConfigurationPEMAccelerometer gains increased by 10[COLOR=chocolate][SIZE=3]We increased the
Accelerometer gains by 10 by modifying the
C1ADCU_PEM.ini file.[/SIZE][/COLOR]
 acc.png 
  3355   Wed Aug 4 01:44:56 2010 KojiConfigurationPEMAccelerometer located on and below the PSL table[Jenne and Koji] 
In order to characterize the seismic vibration
 IMG_2675.jpgIMG_2678.jpgIMG_2682.jpg 
  3395   Tue Aug 10 22:40:55 2010 KojiSummaryPEMAccelerometer located on and below the PSL tableResult
of the accelerometer measurement
Introduction

We wanted to characterize
 PEM_100809.pdf 
  7262   Thu Aug 23 21:53:18 2012 YaakovUpdatePEMAccelerometer locationThe MC1 accelerometer cube (3 accelerometers
arranged in x,y,z) is under the PSL table,
as I found it at the beginning of the summer.
  
  882   Mon Aug 25 17:45:34 2008 rana, josephb, robHowToPEMAccelerometer rangeJoe shows us by jumping up ~15" in the control
rom that the accelerometers are set with
not enough gain.
 Screenshot-4.png 
  853   Tue Aug 19 14:25:38 2008 SharonUpdatePEMAccelerometer's calibration - update[COLOR=blue][B]Goal[/B][/COLOR] - Make sure
the accelerometers are calibrated among themselves
(have the same power spectrum when they are
 acccalibafter.pngacccalibbefore.png 
  151   Fri Nov 30 20:17:26 2007 AndreyConfigurationPEMAccelerometers and alum.plates for themAll 6 accelerometers which were located near
the ITMX are turned off and disconnected
from the power cords.
 Scheme_Aluminum_Piece-inches.pdf 
  172   Wed Dec 5 23:19:03 2007 AndreyConfigurationPEMAccelerometers are turned on
All accelerometers have been turned on, as
Alan asked during Wednesday meeting.
 7x 
  11362   Wed Jun 17 15:31:50 2015 ericqUpdatePEMAccelerometers fully installedMC1 accelerometer has been plugged in.
The modecleaner locking has been intermittent
today, but I looked at a 15 minute lock in
 IMCcoherence_Jun172015.xml.zipIMCcoherence.png 
  11359   Mon Jun 15 16:55:39 2015 ericqUpdatePEMAccelerometers installedThe accelerometers have been installed
at MC1 and MC2. MC2 data is live, I haven't
yet run the cables from the MC1 set to the
 MC2.jpgMC1.jpgmc2accspectra.png 
  11389   Wed Jul 1 16:16:46 2015 IgnacioUpdateGeneralAccelerometers reinstalled for future huddle testToday, I installed the Wilcoxon accelerometers
in the table near the end of the mode cleaner.
I only set three of them up instead of all
 9x 
  1692   Tue Jun 23 23:14:36 2009 ClaraConfigurationPEMAccelerometers relocatedBoth accelerometers have been moved in
an attempt to optimize their positions. The
MC1 accelerometer was moved from one green
  
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