<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date: 2021/11/19 13:00-13:40 Participants: Takahashi, Ikeda, Hirata, Sato, Uchiyama, Tomaru, Ushiba, Sugiyama, Aso, Kimura [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * IX: GRX. The cavity was locked. * EX: GRX. F0 FR was recovered. GAS LVDT coefficients were confirmed. * IY: BF LVDT was calibrated again. * EY: GRY. Replacement of flip cables. Preparation for ACCs. == Status == * Replacement of Flip cable: EY on 11/17. EX on 11/25. IX on 11/26. * TM height setting: ITMY. * Oplev: Setup of the TM Oplev in IY after the TM alignment. * ACC: Installation to EX is scheduled on 11/24-25. Assembly for EY is ongoing. Actuator coil of H1 ACC for IY was replaced * Commissioning in air: GRX. * Commissioning in vacuum: Chamber closing was scheduled from 12/13. * Overall commissioning: * Acceptance check: * PF actuator: At the in-vacuum commissioning. * New vacuum pumps for V-chambers: 11/24-25 in IXV. * Heater control: * Power source for Oplev: EX was finished. The next target is IX. == Discussion == ---------- = VIS Meeting = Date: 2021/11/19 14:00-14:30 Participants: Takahashi, Hirata, Sato, Ushiba, Fabian, Terrence, Tanaka, Sugiyama, Aso, Uchiyama, Miyoki == Summary Report == === Type-A === * Recovered the F0 FR stuck in EX. * Confirmed the LVDT coefficients of GAS filters (BF, F3, F1) in EX. * Recalibrated the BF LVDT in IY. * Started the assembly of accelerometers in EY. * Replaced the flip cables. * Replaced the coil drivers for BFV from LPCD to HPCD in IY and EY. * Transported the accelerometers to EX. === Type-B === * SR3 * On Tuesday we checked an aparent problem we detected after installing the cable flip adapters: we were not able to measure the resistance of TM-H2 coil. We realized a gender bender was used inside of the chamber, with the effect of flipping the pins. We just connected the cable without the flip adapter using a non-flipping fake gender bender. * We detected that a pin of the F1 FR cable had a connection to the chamber (GND). This is likely the reason the FR is not working. It seems it would work using an stand-alone driver (not in klog yet). * On Friday we realigned the oplev according to the requirements of the green beam alignment. * BS * We replaced the original LVDT card for the three GAS filters as preparation for testing the converter from double-ended to single-ended output for the reference signal. * The new board had additional connections to improve the noise performance. * We measured the resistances in the old board and "copied" them onto the new board. * Then I adjusted the calibration factors and offsets in the medm screens using the old transfer functions as references. * This approach seemed to be successful for the BF but not for F0. We should calibrate F0 sometime next week. * We tested the converter from double-ended to single-ended output for the reference signal. === Type-Bp === === Type-C === === Electronics === === Control === == Schedule == See [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Schedule|Schedule]] * Type-A team: Installtion of ACCs to EX. * Type-B team: Measurement of BS box, WAB, Calibration of SF. == Safety == == Discussion == == Travel Plans == (Date in Kamioka) The week from 11/22 * Takahashi: 11/24-26 * Sato: 11/24-26 * Hirata: 11/24-26 The week from 11/29 * Takahashi: 11/29-12/3 * Sato: 11/29-12/3 * Hirata: 11/30-12/3 == Next meeting == * 2021/11/26(FRI)