Differences between revisions 20 and 31 (spanning 11 versions)
Revision 20 as of 2018-05-07 13:26:20
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Revision 31 as of 2018-05-08 21:38:08
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 * input power  * Duration
  * officially (as Saito-san mentioned): Apr 28 9:00am to May 7 6:00am (GPS time: 1208908818-1209675618)
 * input power [Kokeyama, Nakano]
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=4377
  * IMC coupling ratio is (1.20-0.72) / (1.20 - 0.25) = 51 %
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   * RFPD transimpedance measurement was done with RFPD with different S/N.
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  * BS IM and TM use high power coil drivers instead of low power.
  * ETMY MN, TM, and TM use high power coil drivers instead of low power.
  * ETMX MN and IM V1/2 use high power coil drivers instead of low power. From May 4 or 5, IM H1/2/3,V3 also uses high power.
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  * slit size ~10mm, at C chamber first, and then A chamber
  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=3848
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  * time delay, resolution ...
  * succeefully monitored the beam under cryo baffles/shields
  * Tcam update frequency ~1sec, resolution [Inoue]
  * Tcam resolution?

  * successfully monitored the beam under cryo baffles/shields
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 * initial alignment
  * https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7659
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 * cooling curve (details -> CRY paper)  * cooling curve (details -> CRY paper) [Hasegawa?]
  * Platform, MN, IM, TM, shields
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  * height change [Inoue]
  * not much info for alignment drift. O(100)urad in yaw [Izumi]
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  * for BS [Fujii]
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 * actuation efficiency drift  * actuation efficiency drift [Yamamoto]
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  * Michelson was lockable if ETMX/Y angular fluctuation is less than a few urad. Earthquakes shook ETMY to O(100) urad.
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   * ETMY takes ~2-3 hours to damp enough for locking. ETMX takes ~1 hour.
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  * CMRR measurement with 3-km Michelson would be difficult
  * IMC CMRR [Nakano]
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== Data acquisition, data transfer ==
 * latency, speed, total amount

Summary of Phase 1 Measurements

  • Summary of Phase 1 measurements for bKAGRA Phase 1 paper.

Basic configurations

Michelson initial alignment

  • details of slit method
  • Tcam and baffle PD performance (details-> Tcam paper)

    • Tcam update frequency ~1sec, resolution [Inoue]
    • Tcam resolution?
    • successfully monitored the beam under cryo baffles/shields

Installation accuracy

Cryogenics

  • cooling curve (details -> CRY paper) [Hasegawa?]

    • Platform, MN, IM, TM, shields
  • alignment drift, height change during the cool down

Suspension characterization

Sensitivity and stability

Seismic noise, arm length drift

Data acquisition, data transfer

  • latency, speed, total amount

Hardware injection test

  • CBC injection(2018/4/30 Night shift)
  • CW injection(2018/5/2 Night shift)

KAGRA/Commissioning/Phase1/Operation/MeasurementsSummary (last edited 2018-10-01 20:39:54 by YutaMichimura)