Differences between revisions 1 and 7 (spanning 6 versions)
⇤ ← Revision 1 as of 2018-06-26 10:54:05 →
Size: 1247
Editor: OsamuMiyakawa
Comment:
← Revision 7 as of 2018-06-26 11:48:50 → ⇥
Size: 1277
Editor: OsamuMiyakawa
Comment:
Deletions are marked like this. Additions are marked like this.
Line 5: Line 5:
 * Attendance: Miyakawa, Aso, Yokozawa, Ohishi, Kokeyama, Miyoki, Tahara, Enomoto, Stefan, Tomura, Ushiyama, Nakano
  * eZuce: Ushiba, Izumi, Inoue, Yamamoto(Toyama), Suzuki, Hirose, Shoda		  * Attendance: Miyakawa, Yokozawa, Stefan, Nakano, Yamamoto
  * eZuce: Shoda, Ushiba, Hirose, Eleonora, Izumi, Yamamoto(Toyama), Kokeyama, Miyoki
Line 8: Line 8:
== Laser ==
Line 10: Line 9:
 * Transmissivity of Faraday Isolator suddenly reduced 60% to 40%.
 * Starding Fiber amp failed due to too low power at the sensor.
 * We will use spare at Mio labs. We can use current low power laser, so schedule won't be changed so much.		 == PMC ==
 * Summary of PMC work by Stefan during his stay at KAGRA
  * Two PZT steering mirrors were installed yesterday for input beam to IMC.
  * Calibration to Hz will be done today.
  * Thermal drive is sill missing.
  * Needs fitness, noise budget or something.
  * Probably we do not need to change HV PZT driver by O3, but needs estimation.
 
 * PMC servo modifications -> Stefan
   * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5155]]
Line 14: Line 20:
 * FSS and PMC locked together -> Nakano, Stefan
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5318]]
 * PMC autolocking sped up -> Stefan, Nakano
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5320]]
Line 15: Line 25:
== IMMT == == Others ==
 * Beam height brain storming -> next week?
  * ETMX and ITMX should be located at half low temperature stage and room temperature stage. It means that ~5mm off from the nominal position. Type A can compensate ~5mm.
Line 17: Line 29:
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5274]]
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5287]]
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5292]]		  * --(Necessary number of High power coil driver -> Aso)--
Line 21: Line 31:
 * Changed titanium screws.
 * IMMT1 repare was done, with 1cm position accuracy.
  * 1cm is not enough(Izumi).
 * IMMT2 repare will be held 7/9~.
 
== PMC ==
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5295]]
 * Offset was implemented.
 * Whitening will be implemented by daughter board.
  * Needs gain at low frequency in digital loop.

== Useful scripts for RT-models ==
 * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5282]]
 * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5224]]		  * Cable cleaning on BS rack will be done this weekend.
Line 38: Line 35:
== Others ==

 * Next meeting: 6/26.		  
 * Next meeting: 7/3.

Minute of KAGRA commissioning meeting

  • Date: 2018/6/26 11AM~12PM
  • Attendance: Miyakawa, Yokozawa, Stefan, Nakano, Yamamoto
    • eZuce: Shoda, Ushiba, Hirose, Eleonora, Izumi, Yamamoto(Toyama), Kokeyama, Miyoki

PMC

Others

  • Beam height brain storming -> next week?

    • ETMX and ITMX should be located at half low temperature stage and room temperature stage. It means that ~5mm off from the nominal position. Type A can compensate ~5mm.

  • Necessary number of High power coil driver -> Aso

  • Cable cleaning on BS rack will be done this weekend.
  • Next meeting: 7/3.

KAGRA/Commissioning/Weekly/20180626/Minute (last edited 2018-06-26 11:48:50 by OsamuMiyakawa)