= PR2 wire breaker meeting =
Participants: Tatsumi, Flaminio, Kimura, Barton, Suzuki, Tomaru, Aso, Takahashi, Ohishi, Hirose, Fabian, K Yamamoto, Ohashi

 1. What happened (Tatsumi)
  * http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4701
  * PR2 wire breakers (two of them) developed cracks after gluing
  * The glue used is EP30-2 from Masterbond.
  * We need to remove them first

 1. Information from LIGO (Mark, Hirose)

  * Hirose
   * LIGO tried heat, acetone and other chemicals to remove EP30-2
   * Acetone soaking is the best: easy and less intrusive to the coating
   * May take a long time (up to a month)  

  * Mark
   * According to a LIGO engineer who did the acetone soaking, average time for removal is 40 huors.
   * A possible configuration: http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4702

 1. What shall we do ?
  * Project member: Mark, Hirose and Tatsumi (sample preparation)
  * Target date for removal: Jan 22 (Jan 15 is better if possible)
  * Location
   * Need to consider the acetone usage in choosing a work location: we can use a normal lab. if the evaporation rate of acetone from the removal system is less than 75ml/h.
   * Evaporation rate depends on the configuration of the acetone soaking system
   * If a room with proper ventilation is necessary, the optics lab in the ATC is available.
  * Next Tasks
   * Mark and Hirose will discuss and come up with a more concrete plan for the removal test
   * Tatsumi will prepare test pieces