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ID Date Author Typedown Category Subject Text Attachments
  14042   Fri Jul 6 19:39:37 2018 Udit KhandelwalSummaryGeneralCAD drawings of cantilever suspension requiredRequest
to Koji to acquire the drawings or 3D CAD
of the cantilever suspensions of the Tip-Tilt
  
  14044   Sun Jul 8 12:20:12 2018 JonSummaryAUXGouy Phase Measurements from AUX-Laser ScansThis note reports analysis of cavity scans
made by directly sweeping the AUX laser carrier
frequency (no sidebands). The measurement
 yarm_aux_carrier_trans.pdfprmi_aux_carrier_trans.pdfdrmi_aux_carrier_trans.pdf 
  14047   Mon Jul 9 17:29:28 2018 Udit KhandelwalSummaryTip-TIltTipTilt mirror holder final changesFinal Summary of changes to mirror holder
in Tip-Tilt holder.

Determining minimum range
 d_COM.png1-1.png1-2.png2-1.png 
  Draft   Wed Jul 11 18:13:19 2018 keerthanaSummaryAUXGouy Phase Measurements from AUX-Laser ScansFrom the Measurement Jon made, FSR is 3.967
MHz and the Gouy phase is 52 degrees. From
this, the length of the Y-arm cavity
  
  14069   Fri Jul 13 20:36:33 2018 KojiSummaryGeneralIn vac/In air heater wiring I went to the Y-end and took more photos
of the cable stand. These revealed that in-vac
pin #13 is connected to the shield of the
 heater_wiring.pdf 
  14073   Mon Jul 16 15:07:19 2018 KojiSummaryVACOven C vent[Steve Koji]

- Attachment1: Removed the thermal
cap. Checked the temperature of the oven.
 P_20180716_141512.jpgP_20180716_141601.jpgP_20180716_141610.jpgP_20180716_141827.jpgP_20180716_143901.jpg 
  14077   Tue Jul 17 12:55:45 2018 KojiSummaryGeneralStarted pumping[Steve, Koji, Gautam]

We started pumping down
at ~12:15PM.
 6x 
  14079   Tue Jul 17 18:16:38 2018 SteveSummaryVACpumpdown 81 at 6 hrsPrecondition:  4 days at atm.  
Atm5

HEPA tent used during the vent
 6x 
  14080   Tue Jul 17 22:25:41 2018 KojiSummaryVACpumpdown 81 at 6 hrs10:20PM


Opened VM2 to pump down
the RGA section with TP1
Stopped
  
  14082   Wed Jul 18 12:49:08 2018 SteveSummaryVACpumpdown 81 at 6 +4.5hrsThe manual gate valve scan was clean. Atm1
    TP1 was pumping on it overnight.

         
 manlGateScan.pnghanding_over_Mag.pngTGVw2auxfans_.jpg 
  14083   Wed Jul 18 17:36:50 2018 SteveSummaryVACpumpdown 81 at 6 +9 hrs completedIFO P1 6e-4 Torr,  manual gate valve
is fully open

The annuloses will be pumped down
 pd81completed.pngpd81@30hrs.png 
  14085   Thu Jul 19 01:56:25 2018 gautamSummaryVACAUX pump shutdown[koji,
gautam]

Per Steve's instructions, we
  
  14086   Thu Jul 19 04:44:09 2018 Annalisa, TerraSummaryThermal Compensationfrequency shift observed with heating!Annalisa, Gautum, Koji, Terra

Summary: with
the reflector setup, we measured a frequency
 scanning_fine_2018-07-19-07-32-08_parsed.pdfscanning_fine_2018-07-19-06-57-47_parsed.pdfYscan_scanning_parsed_2am.txt.pdf 
  14087   Thu Jul 19 11:01:03 2018 SteveSummaryVACpd81 @ 2e-5 TorrCold cathode gauge just turned on.  pd81@2days.png 
  14088   Thu Jul 19 13:35:30 2018 SteveSummaryVACannuloses pumped Roughing down the annuloses required closing
V1 for 13 minutes

IFO is 2.2e-5 Torr
 AnsPumped.png 
  14090   Fri Jul 20 07:43:54 2018 SteveSummarySUSETMY  

 
 ETMY_leveling.pngETMY.png 
  14094   Sat Jul 21 01:06:49 2018 gautamSummaryThermal CompensationY arm lockingI implemented this today. For now, the
LSC output matrix is set to actuate on MC2
for Y arm locking. As expected, the transmission
  
  14096   Sat Jul 21 14:03:19 2018 KojiSummaryThermal CompensationY arm lockingAh. With MC2 feedback, we have about 3
times smaller "optical gain" for
the ASS A2L. We have same dither, same actuator,
  
  14098   Mon Jul 23 09:58:52 2018 SteveSummaryVACRGA scan at day 6 

 
 pd81-560Hz-d6.png 
  14103   Wed Jul 25 14:45:59 2018 SandrineSummaryThermal CompensationETM Y Table AUX read outAttached is a photo of the set up of the
ETM Y table showing the AUX read out set
up. 
 EY_table_.JPG 
  14110   Sat Jul 28 00:45:11 2018 terra, sandrineSummaryThermal CompensationHeater measurements overview[Sandrine, Koji, Terra]

Summary: We
completed multiple scans at different heating
 7x 
  14121   Wed Aug 1 16:23:48 2018 KojiSummaryComputersTransition of the main NFS disk on chiara[Gautam Koji]

Taking the opportunity to shutdown
c1ioo for adding a DAC card, we shutdown
  
  14122   Wed Aug 1 19:41:15 2018 gautamSummaryComputersRTCDS recovery, c1ioo changes[Gautam Koji]

After this work, we recovered the
nominal RTCDS state. The main points were:
 CDS_overview.png 
  14123   Wed Aug 1 20:44:57 2018 gautamSummaryComputersc1omc model (re?)createdThe main motivation behind adding a DAC
card in c1ioo was to setup an RTCDS model
for the OMC. Attachment #1 shows the new
 CDS_OVERVIEW_withOMC.png 
  14125   Thu Aug 2 20:47:29 2018 gautamSummaryElectronicsX Green "Mystery" solvedI walked
down to the X end and found that the entire
  
  14126   Thu Aug 2 20:54:18 2018 gautamSummaryComputersc1omc model looks stableActually, c1lsc had crashed again sometime
last night so I had to reboot everything
this morning. I used the reboot script again,
  
  14127   Thu Aug 2 23:09:25 2018 ranaSummaryComputersX Green "Mystery" solvedI'm going to guess that this was me:
I was disconnecting some octopus power strip
nonsense down there (in particular illuminators
  
  14128   Fri Aug 3 14:35:56 2018 gautamSummaryElectronicsEX AUX electronics power restoredSteve and I restored the power to the EX
AUX electronics rack. The power strip on
the lowest shelf of the AUX rack now
  
  14138   Mon Aug 6 09:42:10 2018 KojiSummaryComputersTransition of the main NFS disk on chiaraFollow up:

- At least it was confirmed that
the local backup (4TB->2TB) is regularly
  
  14175   Wed Aug 22 00:22:05 2018 KojiSummaryElectronicsInspection of the possible dual backplane interfaces for Acromag DAQ[Johannes, Koji]

We went around the LSC, PSL, IOO,
and SUS racks to check how many dual backplane
  
  14177   Wed Aug 22 12:22:27 2018 ranaSummaryElectronicsInspection of the possible dual backplane interfaces for Acromag DAQI think we don't need to keep Crystal
Ref: we can change this into a regular Wenzel
box with no outside control or monitoring.
  
  14213   Sun Sep 23 20:15:35 2018 KojiSummaryOMCMontecarlo simulation of the phase difference between P and S pols for a modeled HR mirror Link to OMC_Lab
ELOG 308
  
  14367   Wed Dec 19 14:19:15 2018 KojiSummaryVACPlan for pumpoing down testWe
still need elaborated test procedure posted

12/29 Wed
 Screenshot_from_2018-12-19_14-49-34.png 
  14439   Thu Feb 7 17:27:53 2019 KojiSummaryTip-TIltFive FiveNine Optics Optics delivered5 PR3/SR3 optics from FiveNine Optics were
delivered. The data sheets were scanned and
uploaded to the following wiki page. https://wiki-40m.ligo.caltech.edu/Aux_Optics
  
  14442   Fri Feb 8 00:20:56 2019 gautamSummaryTip-TIltFive FiveNine Optics Optics deliveredThey have been stored on the 3rd shelf
from top in the clean optics cabinet at the
south end. EX
  
  14444   Fri Feb 8 20:35:57 2019 gautamSummaryTip-TIltCoating spec[Attachment
#1]: Computed spectral
 specRefl.pdfAoIscan.pdf 
  14448   Mon Feb 11 19:53:59 2019 gautamSummaryLoss MeasurementLoss measurement setupTo measure the Y-arm loss, I decided to
start with the classic reflectivity method.
To prepare for this measurement, I did the
 DQcheck.pdfinitialData.pdf 
  14449   Tue Feb 12 18:00:32 2019 gautamSummaryLoss MeasurementLoss measurement setupAnother
arm loss measurement started at 6pm.
  
  14450   Tue Feb 12 22:59:17 2019 gautamSummaryLoss MeasurementY arm lossSummary:

There are still several data quality
issues that can be improved. I think there
 segmented.pdfconsolidated.pdf 
  14451   Wed Feb 13 02:28:58 2019 gautamSummaryLoss MeasurementY arm lossAttachment #1 shows estimated systematic
uncertainty contributions due to 


ITM transmission by +/-
 systUnc.pdf 
  14454   Thu Feb 14 21:29:24 2019 gautamSummaryLoss MeasurementInferred Y arm loss Summary:

From the measurements I have, the
Y arm loss is estimated to be 58
 modelPerturb.pdfposterior_modelParams.pdfposterior_Loss.pdf 
  14463   Sun Feb 17 17:35:04 2019 gautamSummaryLoss MeasurementInferred X arm loss Summary:

To complete the story before moving
on to ALS, I decided to measure the X arm
 DQcheck_XARM.pdfconsolidated.pdfposterior_modelParams_XARM.pdfposterior_Loss_XARM.pdf 
  14464   Mon Feb 18 19:16:55 2019 ranaSummaryComputersnew laptop setup: ASIAThe old IBM laptop (Asia) has died from
a fan error after 7 years. WE have a new
Lenovo 330 IdeaPad to replace it:
  
  14474   Tue Mar 5 15:56:27 2019 gautamSummaryTip-TIltDiscussion points about TT re-designChub, Koji and I have been talking about
Udit's re-design. Here are a few points
that were raised. Chub/Koji can add to/correct
  
  14485   Mon Mar 18 18:10:14 2019 KojiSummaryGeneralTask items and priority[Gautam/Chub/Koji] ~ Mini discussion

Maintenance / Upgrade Items

(Priority high to low)
  
  14543   Mon Apr 15 18:29:07 2019 ranaSummaryComputersnew laptop setup: ASIA - yum issueshad trouble using YUM to update. This turned
out to be a config problem with our Martian
router, not the new laptop. Since I've
  
  14568   Wed Apr 24 17:39:15 2019 YehonathanSummaryLoss MeasurementBasic analysis of loss measurementMotivation


Getting myself familiar
with Python.
Characterize statistical
 LossMeasurementAnalysis.zipLossMeasurement_RawData.pdfLossMeasurement_Hist.pdfLossMeasurement_PSD.pdf 
  14598   Wed May 8 22:11:46 2019 ranaSummaryComputersnew laptop setup: ASIA - yum issues
setup controls user using K Thorne
LLO CDS offsite workstation instructions
modified
/etc/fstab ala pianosa to NFS mount disks
set
  
  14616   Fri May 17 10:12:07 2019 AnjaliSummaryEquipment loanBorrowed componentI borrowed one Marconi (2023 B) from
40 m lab to QIL lab.
  
  14618   Fri May 17 16:07:25 2019 gautamSummaryEquipment loanBorrowed componentZHL-3A (2 units) —-> QIL




  
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