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  40m Log, Page 143 of 344  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  10139   Mon Jul 7 14:42:33 2014 HarryUpdateGeneralBeam WaistsI was finally able to get a reasonable
measurement for the beam waist(s) of the
spare NPRO.
 16x 
  10138   Mon Jul 7 14:38:55 2014 SteveUpdatesafetysafety trainingTaraV
- geology major undergrad -  of Jenne's
  
  10137   Mon Jul 7 13:56:13 2014 AkhilConfigurationElectronicsSetup Used for Characterization of Frequency CounterWhen I was trying to plot PSD of the measurements,
I still couldn't get better resolution. There
still seems to be a problem with timing and
 FreqVsTime.pngMissing_Data.png 
  10136   Mon Jul 7 13:55:26 2014 JenneUpdateLSCc1cal model restartedI'm not sure why the c1cal model didn't
come up the last time c1lsc was rebooted,
but I did an "rtcds start c1cal"
  
  10135   Mon Jul 7 13:44:21 2014 JenneUpdateCDSc1sus - bad fb connection

    

       
            
  
  10134   Mon Jul 7 11:02:22 2014 manasaConfigurationGeneralIFO status post earthquake

    

       
            
  
  10133   Mon Jul 7 10:35:43 2014 JenneUpdateElectronicsRF PDs needed

    

       
            
  
  10132   Mon Jul 7 09:46:00 2014 SteveConfigurationSUSall sus damping restoredAll suspension damping restored. There
had to be an earth quake.
 6.9MagMexico.png 
  10131   Mon Jul 7 08:13:41 2014 steveUpdateGeneralyes,there was firework   8days.png 
  10130   Sat Jul 5 04:18:45 2014 AndresUpdate40m Xend Table upgradeAdding Two Lenses After the Second Steering Mirror in Order Two Increase the Gouy Phase Difference Between the Sterring MirrorsI had been working on the Xend table optical
layout update. Since the two steering mirrors
in the Xend green are too close to each,
 7x 
  10129   Fri Jul 4 09:17:13 2014 AkhilConfigurationElectronicsSetup Used for Characterization of Frequency Counter Goal:
To
 setup.pdf 
  10128   Thu Jul 3 16:28:38 2014 NichinUpdateElectronicsRF cables installed [ Nichin, Eric G]
RF cables have been installed between
deomodulator output PD RF MON and the RF
 AS55_03-07-2014_162634.pdf 
  10126   Wed Jul 2 22:58:11 2014 JenneUpdateLSCLittle Bo-Peep has found her phaseNever
mind.  This is just the
low pass filter that Den put in to try to
  
  10125   Wed Jul 2 21:30:42 2014 JenneUpdateLSCLittle Bo-Peep has lost her phaseLittle Bo-Peep has lost her phase,

 CARM_loop_ArmPowers1_2July2014.pdf 
  10124   Wed Jul 2 16:18:32 2014 JenneUpdateASCIFO aligned, PRMI + 2 arms achievedAfter the meeting, I aligned the IFO to
the IR, and then I aligned the Ygreen to
the Yarm.  I then found the beatnotes
  
  10123   Wed Jul 2 16:16:45 2014 NichinUpdateGeneralLAN wire added [Nichin, Eric Q]
We added a new LAN wire from Rack
1Y4 to 1Y1 to connect the RF switch at 1Y1
  
  10122   Wed Jul 2 15:35:34 2014 ericqUpdateComputer Scripts / ProgramsLocal Chiara backupsKoji has provided a 2TB USB3 external hard
drive that will get daily backups of chiara:/home/cds,
the idea being that if the internal HD at
  
  10121   Wed Jul 2 14:19:17 2014 SteveUpdateGeneralOphir pmeter gets new filterOphir power meter gets new filter with
calibration. This is not cheap. It was the
second time we lost it.
 ophirNewFilter.jpg 
  10120   Wed Jul 2 11:47:26 2014 SteveUpdateVACbroken changeover regulator of N2 supply

    

       
            
  
  10119   Wed Jul 2 11:32:44 2014 Jenne, TaraVUpdatePEMStatus of seismometer stations, Yend Guralp moved[Jenne, TaraV]
We had a look this morning at
the status of the seismometer array, so that
  
  10118   Tue Jul 1 21:20:37 2014 AkhilUpdateElectronicsGain plots of UFC-6000 for 0.1s Sampling Rate  The attached are the gain plots at
carrier frequencies of 100 MHz, 500 MHz and
1 GHz measured using IFR 2023B (Marconi).
 gain.pnggain.pdf 
  10117   Tue Jul 1 18:06:13 2014 nichinUpdateComputer Scripts / ProgramsNetwork Analyzer NWAG4395A data acquisitionEDIT:
The script and template file have been moved
to /opt/rtcds/caltech/c1/scripts/general/netgpibdata/
 LPF2_01-07-2014_175443.pdf 
  10116   Tue Jul 1 13:57:33 2014 ericqUpdateComputer Scripts / ProgramsMC Autolocker on Megatron Just a quick update on the status
of the auto locker:
The auto locker now runs and respawns
  
  10115   Mon Jun 30 22:40:21 2014 ManasaUpdatePSLAOM ringdown

    

       
            
 AOM_ringSample1.pdf 
  10114   Mon Jun 30 22:06:55 2014 JenneUpdateASCIFO (mostly) aligned - ASS working[Koji, Jenne]
The Yarm ASS is now working (as is
the Xarm ASS).  Both of the TT's pitch
  
  10113   Mon Jun 30 16:55:24 2014 ericqUpdateGeneralIFO (mostly) alignedIR Alignment of the IFO is recovered!
Green alignment could use some attention. 
Arms
and PRC hold well, powers are within normal
  
  10112   Mon Jun 30 10:06:39 2014 SteveUpdateVAClow on pneumatic pressure of vacuum valvesThis morning valve condition: V1, VM1,
V4 and V5 valves were closed. IFO pressure
rose to 1.3 mTorr
 runoutofN2.pnglowN2.pngN2d100.png 
  10111   Mon Jun 30 00:18:15 2014 NichinUpdateComputer Scripts / ProgramsUpdated script for acquiring data from Agilent 4395A network analyzer

    

       
            
  
  10110   Fri Jun 27 23:49:56 2014 KojiUpdateGeneralIR beam found, TTs not aligned well yetThe
IR beam was found on the PRM surface, some
CCDs, and in the X arm. 
  
  10109   Fri Jun 27 20:52:30 2014 KojiUpdateCDSOTTAVIA was not on networkI came in the lab. Found bunch of white
EPICS boxes on ottavia.
It turned out that only ottavia was
  
  10108   Fri Jun 27 18:07:38 2014 NichinUpdateComputer Scripts / ProgramsUpdated script for acquiring data from Agilent 4395A network analyzerThe updated script for remotely getting
data from Agilent 4395A network analyzer
is located at /users/nichin
  
  10107   Fri Jun 27 12:54:13 2014 AkhilUpdateElectronicsGain plots of UFC-6000 for 0.1s Sampling Rate  Finally, the 0.1s sampling rate of
the frequency counter(FC) has been achieved.
For this I had to :
 Sampling-0.1s.pdf12.png 
  10106   Fri Jun 27 10:09:10 2014 HarryUpdateGeneralBeam Waist MeasurementPurpose
To use a razorblade to measure beam
waist at four points along  the optical axis,
 BeamWaist.zip 
  10105   Wed Jun 25 20:45:04 2014 NichinUpdateElectronicsAS55 Bodeplot [Nichin]
I
 AS55_06-25-2014.zipAS55_bodeplot.pdf 
  10104   Wed Jun 25 19:29:19 2014 AkhilUpdateElectronicsAnalog-to-Digital Converter I have been trying to use an ADC
with the Raspberry Pi to be able to measure
the phase difference between FC input and
 IMG_1496.png 
  10103   Wed Jun 25 17:49:36 2014 HarryUpdateGeneralRazorblade Analysis Pt. 2Reconfigured razorblade analysis setup
on the PD table as per instructions. Used
it to collect data to calculate beam waist
 RazorbladeSetup.pdf 
  10102   Wed Jun 25 17:13:10 2014 NichinUpdateElectronicsLaser power check - PDFR system[Nichin, Manasa]
I wanted to make sure Alex's system
of Diode laser + laser controller + optical
  
  10101   Wed Jun 25 14:52:22 2014 Andres MedinaUpdateelogPlacing a lens between the steering mirrors and another lens between the second steering mirror and the cavity I was asked to calculate the lenses
that we need in order to obtained a Gouy
phase close to 90 degrees between the two
 SchematicForXendGreenGoingToTheCavity.pdf 
  10100   Wed Jun 25 09:30:44 2014 HarryUpdateGeneralWeekly UpdateSee attached weekly update  Weekly_Update—June_25_thru_July_1.pdf 
  10099   Wed Jun 25 09:17:33 2014 Harry, ManasaUpdateGeneralRazorblade Beam Analysis Setup

    

       
            
  
  10098   Wed Jun 25 09:16:52 2014 HarryUpdateGeneralRazorblade MeasurementsPurpose
To use a razorblade to measure beam
waist at multiple points along the optical
 40m.zip 
  10097   Wed Jun 25 02:01:21 2014 NichinSummaryGeneralWeekly Report Attached is the weekly work plan / equipment requirement
/ lab expert's presence needed for
 Nichin_Week4_update.pdf 
  10096   Wed Jun 25 01:18:24 2014 AkhilUpdateelogWeekly Update Plans
for the Week:

    Phase and noise characterization
  
  10095   Tue Jun 24 22:46:15 2014 ericqUpdateComputer Scripts / Programsop340m crons

    

       
            
  
  10094   Tue Jun 24 18:35:53 2014 JenneUpdateLSCStill no beam going to IFO[Jenne, EricQ, Manasa]
We are still not able to get the
beam to go to the interferometer, which is
  
  10093   Tue Jun 24 16:52:43 2014 NichinUpdateElectronicsAn RF cable re-installed

    

       
            
  
  10092   Tue Jun 24 13:04:49 2014 Harry, ManasaUpdateGeneralRazorblade Beam Analysis SetupHarry will update this elog with details
about his beam waist measurements for the
old NPRO on the SP table.
  
  10091   Tue Jun 24 13:02:54 2014 ManasaUpdatePSLRingdown PD installed

    

       
            
 PSL_ringdown.png 
  10090   Tue Jun 24 01:07:56 2014 JenneUpdateLSCBootfest 2014!Still no real luck getting the beam back
aligned to the IFO.
Koji and I tried a few minutes of
 MMT1_face_23June2014_2315pm.png 
  10089   Mon Jun 23 21:16:14 2014 NichinUpdateElectronicsTransimpedence measurement-BBPD  [Nichin,
Koji] 
Today
 BBPD_transimpedence_06-23-2014.pdfBBPD_readings_06-23-2014.zip 
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