40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 325 of 346  Not logged in ELOG logo
ID Date Author Type Category Subjectdown Text Attachments
  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 
  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 
  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 
  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.
  
  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
  
  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 
  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 
  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.
  
  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 
  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 
  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 
  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 
  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]
  
  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
  
  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 
  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 
  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 
  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 
  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 
  1072   Thu Oct 23 15:27:19 2008 AlbertoUpdateGeneralAbs lengthHere are the measurements I've got yesterday.
The plot shows the transmitted power after
the X arm while sweeping the frequency of
 TRX_aplot_03_04_05_together.png 
  1073   Thu Oct 23 18:23:47 2008 AlbertoUpdateGeneralAbs length[quote]Here are the measurements I've got
yesterday. The plot shows the transmitted
power after the X arm while sweeping the
 TRX_plot_06_07_08_together.png 
  1074   Thu Oct 23 18:27:04 2008 AlbertoUpdateGeneralAbs length[quote]Here are the measurements I've got
yesterday. The plot shows the transmitted
power after the X arm while sweeping the
 HOM_Frequencies.m 
  12163   Thu Jun 9 18:54:40 2016 AakashUpdateGeneralAbout Acromag | SURF 2016Today I tried to setup Acromag Busworks
card. I was able to calibrate and test it
over USB but I couldn't test it over
  
  12352   Fri Jul 29 03:44:04 2016 AakashSummary About Acromag | SURF 2016I tried to recompile the modbusApp binary
for linux-arm acrhitecture since I suspected
someting wrong with it. But still the problem
  
  6129   Sat Dec 17 03:59:32 2011 kiwamuUpdateSUSAborted Hysteresis test

    

       
            
  
  6130   Sat Dec 17 11:53:46 2011 ZachUpdateSUSAborted Hysteresis testDo you guys have timestamps for when you
started/ended the test? I have been trying
to take some long-term RAM data but keep
  
  6131   Sat Dec 17 12:41:46 2011 KojiUpdateSUSAborted Hysteresis testThe test was from: 2011-12-17 09:48 to
11:49 (UTC).
This corresponds to the period from
  
  2249   Thu Nov 12 10:45:02 2009 AlbertoUpdatePSLAbandoned Frequency GeneratorThis morning I found a frequency generator
connected to something on the PSL table sitting
on the blue step next to the sliding doors.
  
  2251   Thu Nov 12 11:19:10 2009 KojiUpdatePSLAbandoned Frequency GeneratorLast night there was an activity for a
calibratuon work, which I helped. I can take
care of the FG.
  
  10006   Fri Jun 6 14:56:09 2014 ericqUpdateelogAaaaaand we're back!ELOG is back up and running after last
Friday's disk-crash-a-thon. SVN is still
a work in progress. Jenne and I are now restarting
  
  9396   Fri Nov 15 13:26:00 2013 JenneUpdateCDSAUXEY is back

    

       
            
  
  5600   Mon Oct 3 13:04:12 2011 JenneUpdateSUSAUXEX, AUXEY rebooted


   
        
            
  
  11944   Fri Jan 22 11:33:20 2016 gautamUpdateGreen LockingAUX-X AM/PM investigationsI was trying to characterize the AM/PM
response of the X end laser. I tried to measure
the AM response first, as follows:
 AUX_X_AM.pdfAUX_X_RIN.pdfNE_Mephisto.png 
  11945   Fri Jan 22 13:33:37 2016 ericqUpdateGreen LockingAUX-X AM/PM investigations


  
  11946   Fri Jan 22 17:22:06 2016 gautamUpdateGreen LockingAUX-X AM/PM investigationsThere were a number of directories in /users/OLD/mott/PZT/2NPRO,
I've used the data in Innolight_AM_New.
Also, I am unsure as to what their "calibration"
 AM_response.pdfNE_investigations.pdf 
  11947   Fri Jan 22 18:46:03 2016 ranaUpdateGreen LockingAUX-X AM/PM investigationsThe PDA photodetectors are DC coupled,
so you cannot use them to go directly into
the analyzer. Must use the DC block so that
  
  13567   Mon Jan 22 20:54:58 2018 KojiSummaryGeneralAUX-PSL beat setupThe beat setup has been made on the PSL
table. The BS and the PD were setup. The
beat was found at 29.42degC and 50.58degC
 IMG_3051.JPG 
  13814   Fri May 4 13:24:56 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Implementation & CharacterizationAttached are final details of the phase-locked
loop (PLL) implementation we'll
use for slaving the AUX 700 mW NPRO laser
 PLL_Schematic.pdfPLL_AUX-PSL_40m.pdf 
  13816   Fri May 4 19:06:28 2018 ranaConfigurationElectronicsAUX-PSL PLL Implementation & Characterizationthis doesn't make much sense to me;
the phase to frequency conversion (mixer-demod
to PZT ) should give us a 1/f loop as Johannes
  
  13867   Fri May 18 19:59:55 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Characterization MeasurementsBelow is analysis of measurements
I had taken of the AUX-PSL PLL using an SR560
as the servo controller (1 Hz single-pole
 SR560_OL.pdfSR560_CL.pdf 
  14085   Thu Jul 19 01:56:25 2018 gautamSummaryVACAUX pump shutdown[koji,
gautam]

Per Steve's instructions, we
  
  13900   Thu May 31 02:04:55 2018 johannesUpdatePSLAUX laser state of mindThe AUX laser is down to 5.4 mW output
power 
 IMG_20180530_220058190.jpg 
  13948   Tue Jun 12 03:22:25 2018 gautamUpdateLSCAUX laser shutteredI worked a bit on recovering the DRMI locking
again tonight. I decided to shutter the AUX
laser on the PSL table at least until I figured
  
  14501   Fri Mar 29 15:47:58 2019 gautamUpdateAUXAUX laser fiber moved from AS table to PSL table[anjali, gautam]

To facilitate the 1um MZ frequency
stabilization project, I decided that the
  
  14504   Sun Mar 31 18:39:45 2019 AnjaliUpdateAUXAUX laser fiber moved from AS table to PSL table

Attachment #1 shows the schematic
of the experimental setup for the frequency
noise measurement of 1 um laser source.
 Schematic_of_experimental_setup_for_frequency_stabilisation_of_1_micron_source.png1_micron_setup_for_frequency_noise_measurement.JPG1_micron_setup_for_frequency_noise_measurement_power_levels.png 
  13834   Fri May 11 18:17:07 2018 gautamUpdateDetCharAUX laser PLL setup[koji,
gautam]

As discussed at the meeting earlier
  
  14045   Sun Jul 8 22:27:25 2018 keerthanaUpdate AUX diagram(Analisa, Keerthana, Sandrine)

So far we tried four different
techniques to scan the AUX laser. They are,
 PLL-single_demodulation.pdfPLL-double_demodulation.pdf 
  13987   Tue Jun 19 18:56:55 2018 JonUpdateGeneralAUX beam alignment issuesNot much progress today with the AUX cavity
scans. I've determined there still are
some alignment issues.
  
  13989   Wed Jun 20 00:57:04 2018 johannesUpdateGeneralAUX beam alignment issuesWe did swap a lens as discussed in elog 13968,
but they both had f=100mm specified, the
difference being one was AR-coated for 1064
 as110_rf_30MHz.pdfyend_rf_30MHz.pdf 
  14013   Sun Jun 24 23:13:46 2018 johannesUpdateGeneralAUX beam alignment issuesAt some point we want to change the AUX
injection on the AS table to interfere less
with the normal interferometer path, and
 AS_AUX_SETUP.pdf 
ELOG V3.1.3-