=== 2018/4/25(Wed.) ===

* Remote participants by eZuce: None

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

 * IFO: *Izumi, Enomoto, Nakano + many
  * Michelson lock lasted ~40min with Guardian.
   * ETMX had some drift. It may cause lock down.

  * Modulation frequency was not tuned yet to iMC length.
   * Measurement of AM conversion can know the matching of mod. freq. to iMC length.

  * PR3: Oplev has glitch. The laser source of oplev may be a cause. Needs fiber cleaner to exchange the laser.

 * BS: *Eleonora, Izumi, Arai
  * BS IM feed back was engaged.
   * Target crossover was originally 3Hz but actual crossover was limited up to ~0.1Hz, because 1.25Hz peak disturbed control.
  * Gain of some loops of oplev servo changed stronger.

 * CAL: *Yamamoto, Enomoto, Izumi
  * Optical measumremnt was measured.
  * Sensitivity is shown in the control room, being calculated from H(t).

 * Injection: *Miyamoto, Yokozawa

 * Noise budget: *Michimura, Enomoto

 * IOO: *Kokeyama, Enomoto
  * MCE trans was clipped. Output PSL was going down to bottom direction, and it was a cause of clipping. This clipping does not affect to IFO control.

 * ETMX: *Hasegawa, Nakano, Enomoto
  * ETMX has some drift for 10-20urad.

 * ETMY: *Nakano, *Shishido, Ushiba, Miyamoto
  * ETMY need L damping.
  * Gardian was implemented.


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

 * BS: *Eleonora, Izumi, Arai
  * Opleve loop gains will change stronger.

 * CAL: *Yamamoto, Enomoto, Izumi
  * Cal signal will be injected.

 * 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 ====