<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date: 2022/1/14 13:00-13:30 Participants: Takahashi, Yokozawa, Ikeda, Ushiba, Aso, Uchiyama, Sato, Hirata [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * IX: Health check. Spectrum was improved. Investigation of the glitch in the F3 signals is still ongoing. Windshield for the MN oplev is not working well. * EX: Health check. * IY: * EY: ALIGN mode is available. LT->Yaw coupling is large. Preparation for ACCs. == Status == * Replacement of flip cables: SRM has not been finished yet. Cables for Type-C will be delivered in the end of Jan. * TM height setting: ITMY. * Oplev: Setup of the TM Oplev in IY after the TM alignment. * ACC: Preparation for EY. * Commissioning in air: Return of GRY. Alignment of SR3/ETMY. * Commissioning in vacuum: Go to the stable lock. * Overall commissioning: * Acceptance check: * PF actuator: At the in-vacuum commissioning. * New vacuum pumps for V-chambers: Cabling of the power line in IXV/EXC on 1/11-12. * Heater control: Test in IXV/EXV is planed. Repaired power controller will be delivered on 1/17. * Power source for Oplev: * Tunnel for the IYC booth: Planned on 1/31. == Discussion == ---------- = VIS Meeting = Date: 2022/1/14 14:00- Participants: Takahashi, Ushiba, Fabian, Ishizaki, Aso, Uchiyama, Terrence == Summary Report == === Type-A === * Preparing for the ACCs in EY. The tuning of the resonant frequency was finished. * Fixed the cables around the IP in EY. * [Terrence] We aligned the EY and get the reflected green under the following condition: * IP L, T, controlled. * BF Y, controlled. * Coarse alignment of yaw using BF yaw pico motor. * Coarse alignment of pitch using MN pitch actuation. * There's something strange. I can't engage all IP controls at the same time. It used to be okay. I will check them later. === Type-B === ==== SR3 ==== * Terrence reported SR3 wasn't healthy, the TF measurements looked bad. * We inspected the suspension and found several security structure screws touching the IM or IRM. * This suspension was healthy, how did it become unhealthy? * As they should be, the screws were likley close to the IM and IRM and began touching the payload when yaw was adjusted with the F0 stepper motor. * When we removed the F0 yaw stepper motor we followed a method to keep the same yaw position, but it seems it was not accurate enough. * We lost the alignment give by the oplev. * The incident angle of the green beam might have changed also. * Terrence updated several control filters of the SR3 and modified guardian. * In the beginning, I thought the yaw oscillation was due to misbehaving control loops at the IP so I modified them in the beginning but turned out it was not helping. * I modified the rest of the control filters for consistency. === Type-Bp === * They inspected the PR3 traverser to check whether it had the locking assenmblies or they had been removed. * We calibrated PRM SF LVDT. The calibration factor hasn't been written in the medm screen yet. * In PR2, we connected the cable for TM-H4. A cable with the same label has beed connected. There are old cables around that flange and they should be removed. === Type-C === === Electronics === === Control === == Schedule == See [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Schedule|Schedule]] * Type-A team: Preparation for the ACCs in EY, Heter test in IXV/EXV, Check of the control in EY, Height adjustment of ETMY. * Type-B team: BS SF calibration, Y-arm commissioning, SRM flip cable == Safety == == Discussion == == Travel Plans == (Date in Kamioka) The week from 1/17 * Takahashi: 1/18-21 * Sato: 1/18-21 * Hirata: 1/18-21 * Aso: 1/17-20 The week from 1/24 * Takahashi: 1/24-28 * Sato: 1/24-28 * Hirata: 1/24-28 == Next meeting == * 2022/1/21(FRI)