=== 2018/4/27(Fri.) ===

* Remote participants by eZuce: None

==== Report of work (*:responsible person) ====

 * IFO: *Izumi, Enomoto + many
  * Michelson lock lasted longer than 2 and half hours!
  * Alignment control from IFO to ETMX was implemented by dithering ETMX.
  * RT models for PR2 and PR3 were down sampled from 16kHz to 2kHz. (Ushiba)
  * PR3 alignment was implemented by baffle signal.
  * ETMX damping might be a cause of lock lost.
  * ETMY yaw damping inclease pitch motion by coupling. It will be improved today.(Ushiba)
  * BS oplev is fed back to not only TM but also IM. (Arai)

 * WAB: *Akutsu
  * Heat consumption is estimated well. 10ppm produce 4W and it will be absorbed by WAB and now it is simulated by heater.
  * Equilibrium temperature was 21K.
  * Damping became to strong in low temperature.

 * SR: *Mark, Enzo, Tanioka, Kozu
  * Wire of RM was broken on SR3 during tightening clamp. There was no damage.

 * CAL: *Yamamoto
  * Line injection is being tested.
  * UGF serve will not be implemented, so change of optical gain is compensated in off line.

 * Operaton:
  * [[KAGRA/Commissioning/Phase1/Operation|Operation wiki page]] is opened.
  * Operation schedule and emergency contact list is put on the white board in the control room.

==== Work plan (*:responsible person) ====

 * IFO: *Izumi, Enomoto, Nakano + many
  * Measurement without locking morning, measurement with locking in the afternoon.


==== Laser hazard ====
 * [AM]
  * IR: Upstream SR2-3 line, Xend 1F, Yend 1F
  * Green: PR2, Xend 1F
 * [PM]
  * IR: Upstream SR2-3 line, Xend 1F, Yend 1F
  * Green: PR2, Xend 1F

 * [night]
  * IR: Upstream SR2-3 line, Xend 1F, Yend 1F
  * Green: PR2, Xend 1F


==== Weekly ====

 * week of 4/23
  * Michelson control.
  * 4/28 Operation start

==== Issues ====