= Minute of KAGRA commissioning meeting =
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 * Date: 2018/5/8 11AM~12PM
 * Attendance: Miyakawa, Yamamoto, Aso
  * eZuce: Suzuki, Hirose, Yokozawa, Izumi, Ushiba
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== 1. Discussion after operation ==

 * IFO, ETMs: Izumi, Yamamoto
  * Well done! Duty cycle is 80-90% in 1-5days, and 15-60% in 6-9days.
  * IMC was quite stable.
  * ETMY was dominant for stability of IFO in the last 4 days.
  * Optical gain fluctuated 20~30% due to the contrast defect.
  * BS coupling between L to P and Y was sometimes dominant for the contrast.
  * Error of Sunup asymmetry was also dominant by optical gain.

 * DAQ
  * DAC of PR3 was dead. Restarting k1pr3 fixed this problem. We are not sure the cause.
  * Timing of dc0 sometimes shifted. Restart daqd of k1dc0 fixed this problem. We are not sure the cause.
  * Diaggui calculates float and sometimes coherence could not be measured.
  * We switched VIS models to 2kHz to avoid glitches. 

 * Satellite box should be replaced to have more capacitance.

== 2. Discussion after phase1 ==

 * ETM leak was triggered 1week delay.
  * Records of opening flange are very important.
 * Manual for VIS and clean booth should be prepared.
 * Mirror schedule should be checked frequently.
 * Optimization of Each DOF of VIS takes 1 day, full VIS take 22 days.

 * Hammaring test of ETMY showed that something hitting.
  * Cable was well placed for ETMX. Fixing ETMY should be scheduled. (Ushiba)
  * Heat link might be causes of fluctuation. It should be compared with ETMX.
 * Needs ETMX cleaning. (Aso, Izumi, Hirose)

 * TF of ETMY BF should be measured. (Izumi)
 * Cross coupling of ETMY was large. (Izumi) 

== 3. Phase 2 ==

 * Each stage and target
  * Name of "Stage" should be replaced. 
 
 * 5/28 extend chief meeting for looking back phase 1.


== Others ==

 * Next meeting: 5/15.