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ID Date Authorup Type Category Subject Text Attachments
  2244   Wed Nov 11 20:57:06 2009 kiwamuUpdateElectronicsMulti-resonant EOM --- LC tank circuit ---I have been working about multi-resonant
EOM since last week.
In order to characterize the behavior
 DSCN0160.JPGLCtank_complete.png 
  2262   Fri Nov 13 03:38:47 2009 kiwamuUpdateElectronicsmulti-resonant EOM --- impedance of LC tank circuit ----I have measured the impedance of the LC
tank circuit which I referred on my
last entry.
 LCtank_impedance.pngLCtank_model.png 
  2263   Fri Nov 13 05:03:09 2009 kiwamuUpdateElectronicsmulti-resonant EOM --- input impedance of LC tank ----I measured the input impedance of the
LC tank circuit with the transformer. The
 input_impedance.pnginput_impedance2.png 
  2277   Mon Nov 16 17:35:59 2009 kiwamuUpdateLSCOMC-LSC timing get synchronized !An interesting thing was happened in the
OMC-LSC timing clock.
Right now the
 OMC-LSC.png 
  2292   Wed Nov 18 14:55:59 2009 kiwamuUpdateElectronicsmulti-resonant EOM --- circuit design ----The circuit design of multi-resonant EOM
have proceeded.
By using numerical
 whole_circuit.pngdesigned.pngmont.png 
  2294   Wed Nov 18 16:58:36 2009 kiwamuUpdateElectronicsmulti-resonant EOM --- EOM characterization ---In designing the whole circuit it is better
to know the characteristic of the EOM.
I made impedance measurement with
 EOM_impedance.png 
  2340   Wed Nov 25 20:44:48 2009 kiwamuUpdateElectronicsMulti-resonant EOM --- Q-factor ----Now I am studying about the behavior of
the Q-factor in the resonant circuit because
the Q-factor of the circuit directly determine
 trans.pngeq1.pngimpedance.pngeq2.png 
  2363   Tue Dec 8 03:53:49 2009 kiwamuUpdateSUSFree swinging spectra of ETMX In this night, I checked the free swinging
spectra of ETMX to make sure nothing wrong
with ETMX by the wiping.
 ETMX_air.png 
  2368   Tue Dec 8 23:13:32 2009 kiwamuUpdateSUSfree swinging spectra of ETMY and ITMXThe free swinging spectra of ETMY and ITMX
were taken after today's wiping, in order
to check the test masses.
 SUS-ETMY.pngSUS-ITMX.png 
  2372   Wed Dec 9 17:51:03 2009 kiwamuUpdateSUSwatchdogsPlease do not touch
the watchdogs for all SUSs except for MCs,
  
  2374   Wed Dec 9 21:09:28 2009 kiwamuUpdateSUSRe: free swinging spectra of ETMY and ITMXOkay, now the data are attached. At that
time I just wanted to say like the follower.
- - -
 Pitch-Yaw_modes.png 
  2391   Thu Dec 10 17:13:36 2009 kiwamuUpdateSUSFree swiging spectra under the atmospheric pressureThe free swinging spectra of ITMs, ETMs,
BS, PRM and SRM were measured last night
in order to make sure that nothing wrong
 summary_freeswing.pdf 
  2401   Fri Dec 11 17:36:37 2009 kiwamuUpdateGeneralIFO restoring planAlberto,
Jenne, Kiwamu
 
  
  2405   Sun Dec 13 17:43:10 2009 kiwamuUpdateSUSfree swinging spectra (vacuum)The free swinging spectra of ITMs, ETMs,
BS, PRM and SRM were measured under the vacuum-condition.
The attachment are measured spectra.
 summary_FreeSwinging_vacuum.pdf 
  2446   Tue Dec 22 15:49:31 2009 kiwamuUpdateGenerale-log restartedI found the e-log has been down around
3:40pm, then I restarted the e-log. Now it's
working.
  
  2450   Thu Dec 24 01:25:29 2009 kiwamuUpdateElectronicsimpedance analyzingThe
validation for high impedance measurement
has been well done. 
 DSCN0421.JPGEOM.png 
  2453   Sun Dec 27 20:05:28 2009 kiwamuUpdateComputerscan not communicate with front-endsIn this evening I found that fb40m has
been down, then I restarted fm40m successfully.
 C0DAQ_DETAIL.png 
  2470   Wed Dec 30 22:17:07 2009 kiwamuUpdateGeneralCamera input and monitor outputThe input channels of the cameras and
the output channels for the monitors are
summarized on the
  
  2523   Mon Jan 18 23:44:19 2010 kiwamuUpdateElectronicstriple resonant circuit for EOMThe first
design of the triple resonant EOM circuit
 whole_circuit.pngdesigned_circuit.png 
  2525   Tue Jan 19 02:39:57 2010 kiwamuUpdateElectronicsdesign complete --- triple resonant circuit for EOM ---The design
of the triple resonant circuit has been fixed.
 realistic.pngscaling.png 
  2529   Tue Jan 19 03:27:47 2010 kiwamuUpdateElectronicsRe: triple resonant circuit for EOM1. You are right, the gain for the
single resonant circuit was about 9.3 in
my measurement.
  
  2533   Tue Jan 19 23:26:07 2010 kiwamuUpdateElectronicsRe:Re: triple resonant circuit for EOM


   
        
            
 matching_edit.pngeq1.pngdesigned_response.png 
  2586   Wed Feb 10 17:28:02 2010 kiwamuUpdateElectronicstriple resonant EOM ---- preliminary resultI have made a
prototype circuit of the triple resonant
 mod_depth.png 
  2590   Thu Feb 11 16:52:53 2010 kiwamuUpdateElectronicstriple resonant EOM ---- preliminary resultThe commercial resonant EOM of New Focus
has the modulation efficiency of 
  
  2596   Fri Feb 12 13:15:41 2010 kiwamuUpdateElectronicstriple resonant EOM --- liniaryity test
I have
measured the linearity of our triple resonant
 linearity_edit.png 
  2601   Fri Feb 12 18:58:46 2010 kiwamuUpdateGreen Lockingtake some optics away from the ETM end tableIn
the last two days Steve and I took some optics
away from the both ETM end table.
 DSC_1164.JPGDSC_1172.JPG 
  2606   Tue Feb 16 11:12:51 2010 kiwamuUpdateGreen LockingRe:take some optics away from the ETM end table

    
        
  
  2609   Tue Feb 16 16:24:30 2010 kiwamuUpdateGreen LockingRe:Re:take some optics away from the ETM end tableI put the TRY_PD back to the end table
and aligned it. Now it seems to be working
well.
  
  2618   Fri Feb 19 15:29:14 2010 kiwamuUpdateCOCGluing dumbbells and magnetsJenne and kiwamu
We have
  
  2619   Fri Feb 19 16:40:43 2010 kiwamuUpdateGreen Lockingrearrange the optics on the end tableKoji and kiwamu
The existing
 DSC_1202.JPGDSC_1207.JPG 
  2635   Tue Feb 23 19:00:45 2010 kiwamuConfigurationVACvent finishedThe vent has been
finished.
  
  2650   Tue Mar 2 12:20:54 2010 kiwamuUpdatePSLstray beamIn order to block stray beams, I have
put some beam dumps and razor blades on the
PSL  table.
  
  2682   Thu Mar 18 15:33:17 2010 kiwamuSummaryElectronicsadvantege of our triple resonant EOMIn
this LVC meeting I discussed about triple
resonant EOMs with Volker who was a main
 electrode.png 
  2688   Sat Mar 20 18:34:19 2010 kiwamuSummaryElectronicsRE:advantege of our triple resonant EOMYes, I found it.
Their advantage is that their circuit
is isolated at DC because of the input capacitor.
  
  2735   Tue Mar 30 21:11:42 2010 kiwamuSummaryGreen Lockingconversion efficiency of PPKTPWith a
30mm PPKTP crystal the conversion efficiency
 efficiency_waist_edit.png 
  2737   Wed Mar 31 02:57:48 2010 kiwamuUpdateGreen Lockingfrequency counter for green PLLRana
found that we had a frequency counter SR620
which might be helpful for lock acquisition
 FCnoise.png 
  2740   Wed Mar 31 11:52:32 2010 kiwamuSummaryGreen LockingRe:conversion efficiency of PPKTPGood point. There is a trick 
to avoid a divergence.
Actually the radius of the cylindrical
  
  2788   Mon Apr 12 14:20:10 2010 kiwamuUpdateGreen LockingPZT response for the innolightI measured a
jitter modulation caused by
  
  2823   Wed Apr 21 10:09:23 2010 kiwamuUpdateGreen Lockingwaist positon of Gaussian beam in PPKTP crystalsTheoretically the waist position of
a Gaussian beam (1064) in our PPKTP crystal
differs by ~6.7 mm from that of the incident
 focal_positin_edit.png 
  2850   Tue Apr 27 14:18:53 2010 kiwamuUpdateGreen Lockingwaist positon of Gaussian beam in PPKTP crystalsThe mode profile of Gaussian beams in
our PPKTP crystals was calculated.
I
 mode_in_PPKTP.png 
  2898   Fri May 7 21:55:59 2010 kiwamuUpdatePSLremove Mach-Zehnder [Koji, Kiwamu]
The
 NO_MachZehnder_s.jpg 
  2920   Wed May 12 10:33:32 2010 kiwamuUpdateGreen LockingRe: Reflection from ETM and ITM !The procedure you wrote down as a standard
is right.   I explain reasons why
we didn't do such way. 
  
  2936   Sun May 16 12:51:08 2010 kiwamuUpdateGreen Lockingreflected beam at PDMode matching
to the cavity has been done.
  
  2956   Thu May 20 12:10:44 2010 kiwamuUpdatePhotosETMY end table I updated the photo of ETMY end table
on the wiki.
http://lhocds.ligo-wa.caltech.edu:8000/40m/Optical_Tables
 ETMY_s.png 
  2957   Thu May 20 12:34:46 2010 kiwamuConfiguration40m Upgradingoptical breadboards with legsYesterday Steve and I revived two legs
to mount some optical breadboards outside
of the end table.
 leg1_small.pngleg2_small.png 
  2959   Thu May 20 13:29:40 2010 kiwamuUpdateGreen Lockingmode profile at PPKTP crystal I measured again the mode profile
of the beam going through the PPKTP crystal
by using the beam scan.
 PPKTPmode.png 
  2960   Thu May 20 14:18:59 2010 kiwamuUpdateGreen Lockingmode profile of 40m cavityThe mode
profile of the green beam going through 40m
 MMT40mcavity.png 
  2975   Mon May 24 14:28:35 2010 kiwamuUpdateElectronicsbad power supply of a vme rackIn this morning I found daqawg didn't work.
After looking for the cause, I found
  
  2978   Tue May 25 07:22:59 2010 kiwamuUpdateElectronicsbad power supply of a vme rackNotes on May 25th
  
  2979   Tue May 25 07:58:23 2010 kiwamuUpdateelogelog downI found the elog got down around 7:30 am
in this morning.
So I restarted it by running the
  
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