= 20190205 =
 * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7975]]
 * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7976]]

== Today's activities ==
Workers: Akutsu, Nagano, K. Tanaka

=== BRT part ===
There were some homeworks left from the last March; see [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/subgroup/AOS/TMSY1/TMSY1GreenOpticsMemo|here]].

|| Optics name (old -> '''''New''''') || Type of the optics || The holder || Note ||
|| 1st steering mirror -> '''''STM3''''' || Newly opened "CVI HM-2037-45" || Polaris-K2S1 + washed but not vented M4 screw + ME-KAGRA-1704107-A-DWG|| I determied to leave the M4 screw without a vent hole, as there is a groove on the pedestal. The outer diameter of the optics was wiped to remove the pencil memo. The original one (TFVMQ-50.8C10-20-W1D-532/1064-ARS-30/40D) was stocked in the desiccator as of 20190205||
|| Harmonic BS -> '''''HBS'''''|| HBSY21|| Polaris-K2S1 + washed M4 screw + OptoSigma VRO-12-100 + VRS-12-100 + VBSP-40100|| ||
|| 2nd steering mirror -> '''''GST0'''''  || Newly opened "TFMQSP-50.8C10-20-532/1064-0/26D" ||Polaris-K2S1 + washed but not vented M4 screw + ME-KAGRA-1704107-A-DWG  || I determied to leave the M4 screw without a vent hole, as there is a groove on the pedestal. The outer diameter of the optics was wiped to remove the pencil memo. The original one (TFVMQ-50.8C10-20-W1D-532/1064-ARS-30/40D) was stocked in the desiccator as of 20190205. When the mirror was inserted to the holder, one of the edge of the mirror was broken... probably due to the narrow aperture of the holder... ||
|| Collimation lens for green (3rd BRT lens for green) -> '''''BRT3'''''|| SLB-50.8-200NM|| VLHG-50.8 + washed M6 imo screw + OptoSigma VRO-12-100 + VRS-12-100 + VBSP-2460 || VBSP-2460 should be replaced to VBSP-40100 later.||
== Next Plan ==
 * 

== Wanted! ==
 * Laser level