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ID Date Author Type Categoryup Subject Text Attachments
  9908   Sun May 4 22:28:54 2014 ericqUpdateLSCfarther into CM [Rana, ericq]
Today, we got a ~2kHz bandwidth
lock of the YARM with the AO path. We weren't
 OLTF.png 
  9909   Mon May 5 19:26:43 2014 JenneUpdateLSCOverride ability for whitening triggering Today I finally implemented a feature
in the whitening triggering that I should
have a long time ago:  an override button.
  
  9912   Tue May 6 02:48:50 2014 JenneUpdateLSCAO path engaged with AS55 as error signal for Yarm locking[Rana, Jenne]
This evening, we were able to
lock the Yarm through the common mode board,
 TF3_5May2014_BoostON_UGF5kHz.pngzipped.tgzCM_TP2A_140506_boostON_realloc.pngout.pdf 
  9913   Tue May 6 03:17:15 2014 ranaUpdateLSCfarther into CMYes,
we still need to do these things, day team.
  
  9917   Tue May 6 17:58:44 2014 ericqUpdateLSCfarther into CM I took a look at the MC OLTF and
AO path TFs with the fast agilent analyzer. 
I played with the relative gain of
 AOTFs.pdf 
  9918   Tue May 6 18:32:14 2014 steveUpdateLSCTRY 60Hz noise huntThis
is an effort to get rid of our ground loops
 ETMY-ISCT_EISOL.jpg 
  9919   Tue May 6 19:38:13 2014 JenneUpdateLSCSet up for PRFPMI CM lockingTo get ready for the PRFPMI CM trials tonight,
I put AS55's cables back to their nominal
state, and now have REFL11 I going to IN1
  
  9920   Wed May 7 04:01:44 2014 rana, jenneUpdateLSCPRFPMI: Common Mode servo using REFL_DC ON, CARM offset still non-zero
    With REFL_DC coupled into
the CM board through an SR560 (with an offset
subtractor), we were able to transition to
  
  9921   Wed May 7 14:01:36 2014 steveUpdateLSCTRY 60Hz noise hunt

    

       
            
  
  9927   Thu May 8 00:40:39 2014 ericqUpdateLSCBNC vs. 2pin LEMO for AO I've checked that the 2pin lemo connector
that was run some time ago from the LSC rack
to the MC board does indeed transmit signals.
 AOcablesWide.pdf 
  9932   Thu May 8 17:00:56 2014 rana, QSummaryLSCREFL_DC handoff didn't work last nightLast
night after checking cabling and turning
on ISS, we tried several times to handoff
  
  9933   Thu May 8 17:25:17 2014 steveUpdateLSCTRY 60Hz noise hunt I
worked at the ETMY-ISCT this morning and
  
  9935   Fri May 9 04:09:39 2014 JenneUpdateLSCCM board boost turn-on checkoutAs part of checking the common mode board
before we get too carried away with using
it, I looked at the time series of the
  
  9936   Fri May 9 04:51:13 2014 ericqSummaryLSCREFL_DC handoff didn't work last night

    

       
            
  
  9938   Fri May 9 14:01:24 2014 JenneUpdateLSCCM board boost turn-on checkoutNote:  I thought I was editing elog
9935, but somehow this became a whole
 17x 
  9945   Tue May 13 03:30:10 2014 JenneUpdateLSCLocking activities - no progress[Jenne, Rana, EricQ]
We tried a few times to engage
the AO path while holding CARM on sqrtTrans
 ALS_outofloop.pdf 
  9951   Wed May 14 02:37:58 2014 JenneUpdateLSCNo big locking newsTonight was mostly cleaning up some scripts,
including the re-writing the restore and
align scripts for the optics. 
  
  9956   Thu May 15 02:32:01 2014 JenneUpdateLSCStarted engaging the AO path, not getting all the way yetI tried many times this evening to engage
the AO path, with limited success.
Q's new scripts worked really well,
 TFSR785_15-05-2014_011008.pdf 
  9957   Thu May 15 02:52:51 2014 JenneUpdateLSCStarted engaging the AO path, not getting all the way yet 
 In addition to a transparent
legend, we need the corresponding CM crossover
  
  9959   Thu May 15 16:46:35 2014 ericqUpdateLSCPossible Path to AO path It's taken a lot of trial and error,
but I've found a path through MATLAB loops
that seems like it may be stable
 AOtransitionSteps.pdfAOtransitionBodes.pdfAOCarmLoop.zip 
  9962   Fri May 16 10:48:32 2014 SteveUpdateLSCY arm T- qpd is getting light guard extension tubeThe qpd was removed from the east end table
and threaded adaptor ring epoxied on it's
shell.
 TRYepox.jpg 
  9963   Fri May 16 10:54:42 2014 ericqUpdateLSCX Arm ALS Noise coming in and outDen and I spent some time with the interferometer
last night with hopes of bringing in the
AO path, but were stymied by the (re)occurrence
  
  9964   Fri May 16 11:22:23 2014 SteveUpdateLSCX Arm ALS Noise coming in and out

    

       
            
  
  9965   Fri May 16 16:08:12 2014 steveUpdateLSCIsolating base plates Electronic components should be ISOLATED
as they are installed on the optical tables.
This is essential to avoid ground
 ISObaseplates.jpg 
  9968   Sun May 18 14:36:04 2014 denUpdateLSCoffsets in 3f and drmi stable lock on 1fEric, Den
We noticed that PRMI RIN is high
when the cavity is locked on RELF33 I&Q
 prmi_rin.pdfdrmi_power.pngsrc_ol.pdf 
  9969   Sun May 18 17:57:54 2014 ranaUpdateLSCETMX transients due to unseated bias cable The daytime crew had noticed that
there were some ETMX angular shifts happening
without any control or intention.
 ETMXbiasCableSeated.pdf 
  9970   Mon May 19 09:19:44 2014 SteveUpdateLSChappy IFO15 hours  whenthinksareworking.png 
  9972   Tue May 20 02:12:35 2014 JenneUpdateLSCALS X noise investigation[Rana, Jenne]
We
have looked at a few things that do and don't
 ALS_outofloop_19May2013.pdfXbeatSaturate.png 
  9976   Tue May 20 16:48:52 2014 ericqUpdateLSC3f StabilitySo, I really should have done this as soon
as Manasa
measured the arm lengths... I've
 3fs.pdfCARMsweepPrcFields.pdf 
  9977   Tue May 20 22:42:28 2014 ericqUpdateLSC3f Stability Here's the angles of MICH and PRCL
from the my earlier plot by themselves; this
shows that the individual demod angles in
 PRCangles.pdf 
  9978   Wed May 21 00:18:40 2014 JenneUpdateLSCPRMI locked with REFL33 vs. REFL165Since Q has found that REFL165 will be
better for holding the PRMI while we reduce
the CARM offset, I had a look at locking
 PRMI_outofloop_20May2014.pdf 
  9979   Wed May 21 05:05:39 2014 JenneUpdateLSCREFL 165 vs 33 investigations[Rana, Jenne]
We spent some time tonight looking
at locking the PRMI with REFL165 vs. REFL33,
  
  9983   Wed May 21 13:20:34 2014 manasaUpdateLSCALS X noise from angular motion of mirrors

    

       
            
 ALSX_OLYerrITM.png 
  9988   Thu May 22 00:30:40 2014 manasaUpdateLSCALS X noise from angular motion of mirrorsBelow are the transfer functions measured
between the angular (pit, yaw) motion of
X arm mirrors and the ALSX error signal.
 ALSX_OLPerrITM2.pngALSX_OLYerrITM.pngALSX_OLPerrETM.pngALSX_OLYerrETM2.png 
  9996   Tue May 27 21:48:31 2014 JenneUpdateLSCX green broadband PD not working???!?Grr.  I am very frustrated. 
After lunch I redid alignment for both X
and Y green systems (Yarm both at the end
 ALS_outofloop_27May2013_2.pdf 
  10000   Wed May 28 17:51:48 2014 manasaUpdateLSCX green broadband PD NOT working

    

       
            
  
  10001   Wed May 28 19:15:38 2014 KojiUpdateLSCX green broadband PD NOT workingIf the PD is the suspect, just pull it
from the table and bring it to the PD testing
setup.
  
  10002   Thu May 29 02:16:02 2014 ericqUpdateLSCHigh Bandwidth power recycled Yarm. I'll put more detail in the morning, but
I was able to get the PRM/ITMY/ETMY coupled
cavities locked with 32kHz bandwidth using
 quickOLTFs.pdf 
  10004   Thu May 29 14:40:17 2014 KojiUpdateLSCHigh Bandwidth power recycled Yarm. Wait. It is not so clear.
Do you mean that the IFO was locked
with REFL11I for the first time? 
  
  10005   Thu May 29 15:33:55 2014 ericqUpdateLSCHigh Bandwidth power recycled Yarm.

    

       
            
  
  10047   Mon Jun 16 23:15:44 2014 JenneUpdateLSCIFO alignment recoveryI noticed today, and Rana said that he
saw Saturday, that 
 Note_061614_230723_0.jpg 
  10051   Tue Jun 17 17:14:14 2014 ManasaUpdateLSCIFO alignment recovery 1. Recovered MC alignment and locked
it manually after the ottavia cron failed
to help.
  
  10053   Tue Jun 17 21:49:13 2014 JenneUpdateLSCIFO alignment recoveryPRMI locking with REFL33 is fine. 
As it was yesterday, it's a little wobbly
without the ASC (just PRM oplev), but I don't
  
  10055   Wed Jun 18 11:57:44 2014 not JenneUpdateLSCIFO alignment recovery

    

       
            
  
  10068   Thu Jun 19 00:02:48 2014 JenneUpdateLSCPRMI+2 arms recoveryArms locked in comm and diff with ALS.
PRMI locked with REFL33 I&Q while arms
off resonance. Having trouble reducing CARM
  
  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 
  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
  
  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 
  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
  
  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"
  
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