<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date: 2022/6/3 13:00-13:40 Participants: Takahashi, Miyoki, Ikeda, Akutsu, Uchiyama, Hirata, Sato, Node, Ushiba, Yokozawa, Aso [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * IX: MN Oplev Laser noise (Preparing for temperature control). Offload. * EX: Recovery from cooling (Setpoint change, Offload, Health check). * IY: Leak test. Offload. * EY: Leak test. * Type-B: Recovery from FC on BS (OSEM adjustment, Cable touching, 50mHz yaw motion). Visual inspection of BS is necessary. Stand-alone SM driver for SR3. Geophone #2 in SR2. * Type-Bp: Test of traverser limit SW in PRM. Installation of MSB to BS. Health check of PRs. FC on PR3 and traverser limit SW to PR3 in the late next week. * Type-C: Alignment of OMC in the next week (Start from Y-arm alignment). == Status == * Replacement of flip cables: EXT and BF temp. * TM height setting: Following the cooling. * Oplev: TM Oplev windshield in EX. * ACC: * Commissioning in air: * Commissioning in vacuum: Y-arm lock with Stefan and transmission of X-arm in the next week. * Acceptance check: * PF actuator: At the in-vacuum commissioning. * New vacuum pumps for V-chambers: Tested in IYA. Test in IYV in the next week. * Heater control: Pending. * TMS: QPD in EX. == Discussion == ---------- = VIS Meeting = Date: 2022/6/3 14:00-14:25 Participants: Takahashi, Uchiyama, Fabian, Aso, Tanaka, Ushiba, Washimi == Summary Report == === Type-A === * Offloaded the GAS filters in IX, EX, and IY. === Type-B === * Beam Splitter: after First Contact work last week, the H2 OSEM readout was close to the end of its usable range. * We found a cable from one of the RM coils touching the security structure. We moved it and clamped it in a slightly different position. * Then we adjusted the pitch and yaw of the BS using the picomotor and F0 yaw stepper motor respectively. * We also inspected that nothing around the BF was touching the security structure. Ushiba-san also made a quick test moving up and down the F0 and checking the output of F1 and BF LVDTs. * Finally, we moved H2 and H3 OSEMs to more suitable positions. * We measured TFs and corroborated that the system is healthy. * In SR2, the geophones stopped working, so we checked. The problem was tracked down to the geophone #2 pins powering the preamplfier. There is a short circuit between pins 4 and 5. Next week we will check the in-vacuum cables and, depending on the result, we may want to change the preamplfier or the whole geophone with its pod. === Type-Bp === * Health check of PR suspensions. === Type-C === === Electronics === === Control === == Schedule == See [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Schedule|Schedule]] * Type-A: Y-arm lock. * Type-B: Geophone in SR2. * Type-Bp: FC on PR3. Traverser limit SW in PR3. * Type-C: Alignmenet of OMC. == Safety == == Discussion == == Travel Plans == (Date in Kamioka) The week from 6/6 * Takahashi: 6/7-10 * Sato: 6/6-10 * Hirata: 6/6-10 * Aso: 6/6-9 The week from 6/13 * Takahashi: * Sato: * Hirata: == Next meeting == * 2022/6/10(FRI)