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IDup Date Author Type Category Subject Text Attachments
  15278   Tue Mar 17 01:22:03 2020 gautamUpdateLSCLocking updatesSummary:

No real progress tonight - I made
it a bunch of times to the point where CARM
  
  15279   Wed Mar 18 21:43:26 2020 gautamUpdateVACMain vol pressure jumpThere was a jump in the main volume pressure
at ~6pm PDT yesterday. The cause is unknown,
but the pressure doesn't seem to be coming
 VacPresJump.png 
  15280   Wed Mar 18 22:10:41 2020 KojiUpdateVACMain vol pressure jumpI was in the lab at the time. But did not
notice anything (like turbo sound etc). I
was around ETMX/Y (1X9, 1Y4) rack and SUS
  
  15281   Thu Mar 19 03:33:28 2020 gautamUpdateLSCMore locking updatesSome short notes, more details tomorrow.


I was able to make it to
CARM on RF only ~10 times tonight.
Highest
 PRFPMI_lock.pngCARMTF.pdfDARM_AvB.pdflockLoss.png 
  15282   Tue Mar 24 19:41:57 2020 gautamUpdateWienerSeismic feedforward for MCLSummary:

I think the feedforward filters
used for stabilizing MCL with vertex seismometers
 IMCseisFF.pdffilterComp.pdfoldFilter_v_proposed.pdfMCL_ff_performance.pdf 
  15283   Wed Mar 25 15:15:55 2020 gautamUpdateVACVacuum interlock code, N2 warning updateThe email address in the N2 checking script
wasn't right - I now updated it to email
the 40m list if the sum of reserve tank pressures
  
  15284   Thu Mar 26 17:41:18 2020 JonOmnistructureBHDBHD docs compilationSince there has been a proliferation of
BHD Google docs recently, I've linked
them all from the BHD
  
  15285   Thu Mar 26 22:31:34 2020 YehonathanUpdateCDSC1AUXEY wiring + channel listI have made a wiring
+ channel list that need to be included
in the new C!AUXEY Acromag.
  
  15286   Mon Mar 30 19:02:49 2020 ranaUpdateGeneraldonated cleanroom supplies to HospitalsYesterday evening I took nearly all of
the masks, gloves, gowns, alcohol wipes,
hats, and shoe covers. These were the ones
  
  15287   Tue Mar 31 09:39:41 2020 gautamUpdateCDSFoton for shaped noise injectionsI'd like to re-measure the transfer
function from driving MC2 position to the
MC_L_DQ channel (for feedforward purposes).
  
  15288   Tue Mar 31 23:35:50 2020 ranaUpdateCDSFoton for shaped noise injectionsdo you really mean awggui cannot make shaped
noise injections via its foton text box ?
That has always worked for me in the past.
  
  15289   Tue Mar 31 23:54:57 2020 gautamUpdateCDSFoton for shaped noise injectionsThe problem is that foton does not inherit
the model sample rate when launched from
DTT/awggui. This is likely some shared/linked/dynamic
  
  15290   Wed Apr 1 00:51:41 2020 gautamUpdateWienerSlightly improved MCL FFSummary:

Retraining the MCL filters resulted
in a slight improvement in the performance.
 MC2_act_calib.pdfIIR_fit_to_FIR.pdfFIRvIIR.pdf 
  15291   Thu Apr 2 15:53:01 2020 gautamUpdateASCPRMI 1f locked for collecting feedforward dataThis afternoon, I kept the PRM locked for
~1hour and then measured transfer functions
from the PRM angular actuators to the POP
  
  15292   Thu Apr 2 16:31:33 2020 JonUpdateCDSC1AUXEY wiring + channel list


Quote:


  
  15293   Thu Apr 2 22:19:18 2020 KojiUpdateCDSC1AUXEY wiring + channel listWe want to migrate the end shutter controls
from c1aux to the end acromags. Could you
include them to the list if not yet?
  
  15294   Fri Apr 3 12:09:53 2020 JonUpdateCDSC1AUXEY wiring + channel list


Quote:


  
  15295   Fri Apr 3 13:40:07 2020 JonUpdateBHDBHD front-end complicationI wanted to pass along a complication pointed
out by K. Thorne re: our plan to use Gen1
(old) Dolphin IPC cards in the new real-time
  
  15296   Fri Apr 3 17:15:53 2020 gautamUpdateASCPOP angular FF filters trained and testedSummary:
Using the data I collected yesterday,
the POP angular FF filters have been trained.
 FIRvIIR.pdfPRM_act_calib.pdfIIR_fit_to_FIR_PIT.pdfIIR_fit_to_FIR_YAW.pdfPOP_DC_comparison.pdf 
  15297   Mon Apr 6 12:26:07 2020 ranaUpdateASCPOP angular FF filters trained and testedthat's pretty great performance. maybe
you can also upload some code so that we
can do it later too - or maybe in the 40m
  
  15298   Mon Apr 6 16:46:40 2020 gautamUpdateASCPOP angular FF filters trained and testedI don't have a recent measurement of
the optical gain of this config so I can't
undo the loop, but in-loop performance doesn't
 PRCL_comparison.pdf 
  15299   Tue Apr 7 10:56:39 2020 JonUpdateBHDBHD front-end complication


Quote:


  
  15300   Tue Apr 7 15:30:40 2020 JonSummaryNoiseBudget40m noise budget migrated to pygwincIn the past year, pygwinc has expanded
to support not just fundamental noise calculations (e.g.,
quantum, thermal) but also any number of
  
  15301   Mon Apr 13 15:28:07 2020 KojiUpdateGeneralPower Event and recovery[Larry (on site), Koji
& Gautam (remote)]

Network recovery
  
  15302   Mon Apr 13 16:51:49 2020 ranaSummaryDAQNODUS: rsyncd daemon / service set upI just now modified the /etc/rsyncd.conf
file as per Dan Kozak's instructions.
The old conf file is still there with the
  
  15303   Tue Apr 14 23:50:06 2020 KojiUpdateGeneral40m power glitch recovery[Koji / Gautam (Remote)]

Lab
status
  
  15304   Wed Apr 15 15:15:17 2020 ChubUpdateVACnitrogen cylinders deliveredFour nitrogen cylinders replaced the empties
in the rack at the west entrance.  Additionally,
Airgas will now deliver only once a week.
  
  15305   Thu Apr 16 21:13:20 2020 JonUpdateBHDBHD optics specificationsSummary

I've generated
specifications for the new BHD optics. This
includes the suspended relay mirrors as
 LO_Beam_Calc-v1.pdfAS_Beam_Calc-v1.pdf 
  15306   Sat Apr 18 13:32:31 2020 ranaUpdateCamerasGigE w better NIR sensitivvityThere's this
elog from Stephen about better 1064
sensitivity from Basler. We should consider
  
  15307   Sat Apr 18 14:57:44 2020 YehonathanUpdateLoss MeasurementArm transfer function measurementOk, now I understand my foolishness. It
should definitely be 1/sqrt(f^2+fp^2)
.
  
  15308   Mon Apr 20 17:49:58 2020 gautamUpdateGeneralSome housekeeping

Empty
N2 replaced. 


Logged back into zita and started
 fDomainWF_Apr06.pdffDomainWF_Apr20.pdf 
  15309   Wed Apr 22 13:52:05 2020 gautamUpdateDetCharSummary page revivalCovid 19 motivated me to revive the summary
pages. With Alex Urban's help, the infrastructure
was modernized, the wiki
  
  15310   Wed Apr 22 17:29:14 2020 gautamUpdatePSLFSS debugging attemptsSummary:

On Monday, I hooked up an AG4395
to the PMC error point (using the active
 FSSspec.pdf 
  15311   Thu Apr 23 09:52:02 2020 JonUpdateCamerasGigE w better NIR sensitivvityNice, and we should also permanently install
the camera server (c1cam)
which is still sitting on the electronics
  
  15312   Thu Apr 23 10:42:02 2020 ranaUpdatePSLFSS debugging attemptsI had set up the 4395 to do this automatically
a few years ago, but it looked
at the FSS/IMC instead. When the PCDRIVE
  
  15313   Fri Apr 24 00:26:59 2020 ranaSummaryPEML.A. EQ from Tuesday night   April22-EQ.pdf 
  15314   Thu Apr 30 07:29:01 2020 ChubUpdateVACN2 delivered.Hi All,

The new nitrogen cylinders were
delivered to the rack at the west entrance.
  
  15315   Fri May 1 01:49:55 2020 gautamUpdateALSASY commissioningSummary:

It appears that the EY green steering
PZTs have somehow lost their bipolar actuation
  
  15316   Fri May 1 22:44:17 2020 gautamUpdateALSASY M2 PZT damagedI went to EY and saw that the HV power
supply was only putting out 50 V and had
hit the current limit of 10 mA (nominally,
  
  15317   Sat May 2 02:35:18 2020 KojiUpdateALSASY M2 PZT damagedYes, we are supposed to have a few spare
PI PZTs.
  
  15318   Tue May 5 23:44:14 2020 gautamUpdateASCIMC WFSSummary:

I've been thinking about the
IMC WFS. I want to repeat the sort of analysis
 WFSmatrixComparison.pdfWFSheadNoise.pdf 
  15319   Wed May 6 00:31:09 2020 gautamUpdateALSOptomechanics during CARM offset reductionSummary:

The apparent increase in the ALS
noise (witnessed in-loop, e.g. 
 CARMplant.pdfCARMplant_force2disp.pdf 
  15320   Thu May 7 09:43:21 2020 ranaUpdateASCIMC WFSThis
is the doc from Keita Kawabe on why the
WFS heads should be rotated.
  
  15321   Thu May 7 10:58:06 2020 gautamUpdateASCIMC WFSOK so the QPD segments are in the "+"
orientation when the 40m IMC WFS heads are
mounted at 45 deg. I thought "+"
  
  15322   Fri May 8 14:27:25 2020 HangUpdateBHDNew SRC gouy phase[Jon, Hang]

After updating the 40 m finesse
file to incorporate the new SRC length (and
 mode_spec_finesse.pdfmode_spec_ideal.pdf 
  15323   Sat May 9 17:01:08 2020 YehonathanUpdateLoss Measurement40m Phase maps loss estimationI took the phase maps of the 40m X arm
mirrors and calculated what is the loss of
a gaussian beam due to a single bounce. I
 ITMX_Loss_Map.pdfETMX_Loss_Map.pdfITMX_Phase_Map_(nm).pdfETMX_Phase_Map_(nm).pdf 
  15324   Mon May 11 00:12:34 2020 gautamUpdateLSCRF only PRFPMIFinally - Attachment
#1. This plot uses
 PRFPMIlock.pdfIMG_8549.JPGIMG_8548.JPGDARM_OLTF.pdf 
  15325   Tue May 12 17:51:25 2020 ranaSummaryComputer Scripts / Programsupdated LESS syntax highlight on nodusapt install source-highlight

then modified bashrc to point to
/usr/share instead of /usr/bin
  
  15326   Tue May 12 18:16:17 2020 gautamUpdateLSCRelative importance of losses in the arm and PRCAttachment
#1 is meant to show
 armLossVSPRCloss.pdf 
  15327   Tue May 12 20:16:31 2020 KojiUpdateLSCRelative importance of losses in the arm and PRCIs \eta_A the roundtrip loss for an arm?

Thinking about the PRG=10 you saw:
- What's the current PR2/3 AR?
  
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