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ID Date Author Type Category Subject Text Attachments
  15339   Wed May 20 18:45:22 2020 HangUpdateBHDBHD mode-matching study--corner plot & adjustment requirementAs Rana suggested, we present the
scattering plot of the AS path
mode matching for various variables.
 AS_MM_scat2.pdfAS_MM_adj2.pdf 
  15338   Tue May 19 15:39:04 2020 YehonathanUpdateLoss Measurement40m Phase maps loss estimationI have a serious concern about this low
angle scattering analysis:

Phase maps perturb the spatial
 Mode_power_fraction1.pdf 
  15337   Tue May 19 15:24:06 2020 ranaUpdateBHDBHD mode-matching studyIt would be good to have a corner
plot with all the distances/ RoCs. Also
perhaps a Jacobian
  
  15336   Mon May 18 18:00:16 2020 HangUpdateBHDBHD mode-matching study[Jon, Tega, Hang]

We proposed a few BHD mode-matching telescope
designs and then preformed a few monte-carlo
 MM.pdf 
  15335   Fri May 15 19:10:42 2020 gautamUpdateSUSAll watchdogs tripped, now restoredThis
EQ in Nevada seems to have tripped all watchdogs.
ITMX was stuck. It was released, and all
  
  15334   Fri May 15 09:18:04 2020 JonUpdateBHDBHD telescope designs accounting for ASCHang and I have reanalyzed the BHD telescope
designs, with the goal of identifying
sufficiently non-degenerate locations for
 LOpath.pdfASpath.pdf 
  15333   Thu May 14 19:00:43 2020 YehonathanUpdateLoss Measurement40m Phase maps loss estimationPerturbation theory:

The cavity modes 
  
  15332   Thu May 14 12:21:56 2020 YehonathanUpdateLoss Measurement40m Phase maps loss estimationI finished calculating the X Arm loss using
first-order perturbation theory. I will post
the details of the calculation later.
 ITMX_Loss_Map_Perturbation_Theory.pdfETMX_Loss_Map_Perturbation_Theory(1).pdf 
  15331   Thu May 14 00:47:55 2020 gautamSummaryComputer Scripts / Programspcdev1 added to authorized keys on nodusThis is to facilitate the summary page
config fines to be pulled from nodus in a
scripted way, without being asked for authentication.
  
  15330   Thu May 14 00:21:03 2020 gautamUpdateLSCCM board boostsSummary:

I think the boosts that are currently
stuffed on the CM board are too
 boosts.pdfboosts_noise.pdf 
  15329   Wed May 13 15:13:11 2020 YehonathanUpdateLoss Measurement40m Phase maps loss estimationKoji pointed out during the group meeting
that I should compensate for local tilt when
I move the beam around the mirror for calculating
 ITMX_Loss_Map.pdfETMX_Loss_Map.pdf 
  15328   Tue May 12 22:47:49 2020 gautamUpdateLSCRelative importance of losses in the arm and PRCYes, \eta_A is the (average) round-trip
loss for an arm cavity. I'd estimate
this is ~100ppm currently. I edited the original
  
  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?
  
  15326   Tue May 12 18:16:17 2020 gautamUpdateLSCRelative importance of losses in the arm and PRCAttachment
#1 is meant to show
 armLossVSPRCloss.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
  
  15324   Mon May 11 00:12:34 2020 gautamUpdateLSCRF only PRFPMIFinally - Attachment
#1. This plot uses
 PRFPMIlock.pdfIMG_8549.JPGIMG_8548.JPGDARM_OLTF.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 
  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 
  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 "+"
  
  15320   Thu May 7 09:43:21 2020 ranaUpdateASCIMC WFSThis
is the doc from Keita Kawabe on why the
WFS heads should be rotated.
  
  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 
  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 
  15317   Sat May 2 02:35:18 2020 KojiUpdateALSASY M2 PZT damagedYes, we are supposed to have a few spare
PI PZTs.
  
  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,
  
  15315   Fri May 1 01:49:55 2020 gautamUpdateALSASY commissioningSummary:

It appears that the EY green steering
PZTs have somehow lost their bipolar actuation
  
  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.
  
  15313   Fri Apr 24 00:26:59 2020 ranaSummaryPEML.A. EQ from Tuesday night   April22-EQ.pdf 
  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
  
  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
  
  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 
  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
  
  15308   Mon Apr 20 17:49:58 2020 gautamUpdateGeneralSome housekeeping

Empty
N2 replaced. 


Logged back into zita and started
 fDomainWF_Apr06.pdffDomainWF_Apr20.pdf 
  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)
.
  
  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
  
  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 
  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.
  
  15303   Tue Apr 14 23:50:06 2020 KojiUpdateGeneral40m power glitch recovery[Koji / Gautam (Remote)]

Lab
status
  
  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
  
  15301   Mon Apr 13 15:28:07 2020 KojiUpdateGeneralPower Event and recovery[Larry (on site), Koji
& Gautam (remote)]

Network recovery
  
  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
  
  15299   Tue Apr 7 10:56:39 2020 JonUpdateBHDBHD front-end complication


Quote:


  
  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 
  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
  
  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 
  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
  
  15294   Fri Apr 3 12:09:53 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?
  
  15292   Thu Apr 2 16:31:33 2020 JonUpdateCDSC1AUXEY wiring + channel list


Quote:


  
  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
  
  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 
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