40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 199 of 355  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  7855   Wed Dec 19 11:14:25 2012 SteveUpdateSUSBeCu wire in stock


  7854   Tue Dec 18 16:44:00 2012 rijuUpdate Photodiode transimpedanceToday I measured the dark current of the
PDA10CF. The output of the PD was connected
to the A channel of the network analyzer,
  7853   Tue Dec 18 16:37:40 2012 SteveUpdateVAClast RGA scan before vent 
  7852   Tue Dec 18 16:37:17 2012 JamieUpdateAlignmentPost vent, pre door removal alignment[Jenne, Manasa, Jamie]
Now that we're up to air we relocked
the mode cleaner, tweaked up the alignment,
  7851   Tue Dec 18 15:51:33 2012 JenneUpdateIOOOld G&H TT mirrors' phase maps measuredI took the 2 G&H mirrors that we de-installed
from PR3 and SR3 over to GariLynn to measure
their phase maps. Data is in the same place
  7850   Tue Dec 18 15:32:29 2012 JenneUpdateSUSTT angle of incidence

  7849   Tue Dec 18 10:43:20 2012 SteveUpdateVACvent has completed The 40m vacuum envelope is at atm   
It took 4.5 hours at ~3 Torr/min speed. Atm1
  7848   Tue Dec 18 07:03:40 2012 ManasaUpdateGeneralVent plan: WE VENT TOMORROW


  7847   Tue Dec 18 00:45:19 2012 KojiSummaryGeneralThe projector lamp ended its life?...Nah.   
  7846   Mon Dec 17 22:49:33 2012 ManasaSummaryGeneralThe projector lamp ended its life?


  7845   Mon Dec 17 22:42:27 2012 KojiSummaryGeneralThe projector lamp ended its life?i just heard a rather large exploding sound
in the control room.
I tried to locate the source and found
  7844   Mon Dec 17 21:41:30 2012 ranaSummarySUSBeCu wireJust in case we want to retrofit   
  7843   Mon Dec 17 21:33:45 2012 ManasaUpdateGeneralVent plan: WE VENT TOMORROW


  7842   Mon Dec 17 20:22:07 2012 JamieUpdateGeneralVent plan: WE VENT TOMORROWWe will vent tomorrow
After lengthy discussion,
I have determined that we should vent now,
  7841   Mon Dec 17 19:47:15 2012 ranaUpdatePEMSeismic StripTool config updatedI have updated the Seismic Striptool display
which is plotted on the wall in the control
room. Please take a look and make comments.
  7840   Mon Dec 17 18:39:02 2012 JenneUpdateIOOIPPOS centered, no IPANG beamI centered IPPOS.  I do not find any
IPANG beam on the ETMY table, even waving
the IR card in the black beam tube.
  7839   Mon Dec 17 14:45:01 2012 JenneUpdateAlignmentVideos with PRMI locked[Jamie, Jenne]
Koji and Jamie locked the PRMI, and
then Jamie and I took some videos. 
  7838   Mon Dec 17 14:13:55 2012 JenneUpdateSUSPRM oplev gains restored


  7837   Mon Dec 17 11:20:58 2012 JenneUpdateSUSBeam dumps on vertex oplevs removedI'm not sure when this was done, but there
were beam dumps in front of the lasers for
BS/PRM oplevs as well as ITMY/SRM oplevs. 
  7836   Fri Dec 14 17:12:19 2012 Evan HallUpdatePSLPMC yaw tune-up (from Wednesday night)Wednesday night, there was ~0.4 V on the
PMC transmission PD. I adjusted the steering
mirrors into the PMC and got the transmission
  7835   Fri Dec 14 16:35:38 2012 AyakaUpdateLSCHigh frequency sensitivity improvedSince I found that the the AS sensitivity
seems to be limited by circuit noise, I inserted
a RF amplifier just after the AS RF output.
  7834   Fri Dec 14 14:40:31 2012 RijuUpdate Photodiode transimpedancePhotodiode PDA10CF was under test. The
RF out signal of AG4395A had been divided
by splitter with one output of the splitter
  7833   Fri Dec 14 10:09:30 2012 AyakaUpdateLSCHigh frequency noise in AS signal


  7832   Fri Dec 14 09:31:59 2012 ranaUpdateLSCHigh frequency noise in AS signalThis is NOT calibrated. Its sort of calibrated
in the 500-1000 Hz area, but does not correctly
use the loop TF or the cavity pole.
  7831   Fri Dec 14 09:05:04 2012 steveUpdatePEMTT after eq 6.1 
 SRM, ITMY and MC3 moved some
what, but how are the TT? It may worth looking
  7830   Fri Dec 14 03:49:02 2012 AyakaUpdateGeneralEarthquakeThere was an earthquake around 2:30 am.
Now all the mirrors except SRM are damped.
  7829   Fri Dec 14 03:32:51 2012 AyakaUpdateLSCHigh frequency noise in AS signalI calibrated the AS error signal into the
displacement of the YARM cavity in the same
way as I did before (elog).
  7828   Fri Dec 14 03:15:49 2012 JenneUpdateSUSTT angle of incidenceBut have you looked yet at what angle we
need? The first input string mirror has a
quite small incidence angle. The other input
  7827   Fri Dec 14 02:52:32 2012 KojiUpdateSUSTT angle of incidenceAt least, we don't want to use Al-coated
mirrors. We should use multilayer dielectric
  7826   Fri Dec 14 01:42:53 2012 DenUpdateSUSTT angle of incidenceI've estimated max possible angle of incidence
on TT if we allow 20mm tolerance for the
beam size and 5 mm tolerance for spot location
  7825   Thu Dec 13 21:21:34 2012 DenUpdatePEMseismometers


  7824   Thu Dec 13 18:06:59 2012 AyakaUpdateWienerFilteringNew microphone mounts Yesterday, I made new mounts for
  7823   Thu Dec 13 17:24:53 2012 AyakaUpdatePSLPMC calibration for MC_F calibration I calibrated MC_F signal into Hz/rtHz
unit using the transfer function from
MC_F to PMC feedback signal.
  7822   Thu Dec 13 04:42:32 2012 DenUpdateSUSITMX local dampingTonight we've noticed that ITMX local damping
was kicking the optics. This happened because
LR shadow sensor was not working. In ~30
  7821   Thu Dec 13 04:29:34 2012 DenUpdateSUSTT angle of incidenceI think the angle of incidence on TT inside
BSC will be too large because of eddy current
damping brackets. I've measured max possible
  7820   Thu Dec 13 03:20:48 2012 DenUpdateLSCbeam inside DRMI is clipping on PR3 Tip-Tilt


  7819   Thu Dec 13 01:49:53 2012 ranaUpdatePEMseismometers


  7818   Wed Dec 12 20:22:03 2012 JamieUpdateComputer Scripts / Programsilluminators fixed and added to VIDEO screenI fixed the illuminator setup.  ETMY
was not hooked up, and the screen wasn't
configured quite right.  The ITMX illuminator
  7817   Wed Dec 12 17:26:47 2012 RijuUpdate Testing AG4395A+GPIBI repeated my experiment to get noise level.
To get that I disconnected the bandpass filter
SBP-10.7  from channel A of network
  7816   Wed Dec 12 16:52:12 2012 JenneUpdateAlignmentPR2_face, PR3_back cameras in placeI have setup cameras looking at the back
of PR3 (through the north viewport on the
MC chamber) and the face of PR2 (through
  7815   Wed Dec 12 14:59:49 2012 ManasaConfiguration40m UpgradingNew tip-tilts layout in BSCI have updated the BSC layout to include
the new tip-tilts. The bigger footprints
of the tiptilts are on in
  7814   Wed Dec 12 11:49:05 2012 AyakaUpdateLSCAcoustic noise in POX and AS error signal[Koji, Ayaka]
Last night, I injected acoustic noise
at POX table and AS table with oplev controls
  7813   Wed Dec 12 11:04:45 2012 ManasaConfiguration40m UpgradingEndtable upgrade for auxiliary green laser : ETMX layout on new tableI have updated the layout to fix all the
issues brought up. The last couple of 2"
green steering mirrors will hold the PZTs
  7812   Tue Dec 11 21:53:37 2012 AyakaUpdateLSCOplev update for improving sensitivity[Rana, Ayaka]
The BS oplev pitch feedback came
  7811   Tue Dec 11 19:51:36 2012 KojiUpdatePSLPMC gain was too low / EPICS alerting value for PMC updated[Ayaka, Koji]
Ayaka pointed out that the PMC has
too low unity gain frequency. We checked
  7810   Tue Dec 11 11:40:07 2012 Manasa, AyakaUpdatePSLPMC drift[Manasa, Ayaka]
I found that MC got unstable this
morning. This is caused by the drift of PMC.
  7809   Tue Dec 11 10:09:04 2012 AyakaHowToPEMcables needs care


  7808   Tue Dec 11 09:31:47 2012 AyakaUpdateLSCOplev update for improving sensitivity Motivation
We observed that oplev servos affect
  7807   Tue Dec 11 08:53:52 2012 SteveHowToPEMcables needs careHow NOT
  7806   Mon Dec 10 22:34:34 2012 DenUpdateLSCbeam inside DRMI is clipping on PR3 Tip-Tilt


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