<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date: 2022/10/14 13:00-13:15 Participants: Takahashi, Akutsu, Tomaru, Mitsuhashi, Ushiba, Uchiyama, Yokozawa, Aso, Miyoki, Hirata, Kimura, Ikeda [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * Type-A: Offload of the GAS filters in IX. Test of the heater control in IY. * Type-B: Diagonalization of the IP in BS/SR2. Sensor correction in BS. * Type-Bp: * Type-C: == Status == * Replacement of cables: EXT remains. * Oplev: Stabilization of the light source. * ACC: Evaluation. * Commissioning: FPMI lock with low noise suspension controls. * Acceptance check: [[https://paper.dropbox.com/folder/show/AcceptanceTest-e.1gg8YzoPEhbTkrhvQwJ2zzo3dHVh5sJGieDgbm2n3h60mGqotBeE|DropboxPaper]] * Vacuum system: Reak test in BS was finished. Pump down of the TMSY was started on 10/12. Leak test in IMM, IFI, PRs, and TMSY in the next week. * Heater control: Test in IY. * TMS: Evacuation of TMSY. == Discussion == ---------- = VIS Meeting = Date: 2022/10/14 14:00-14:20 Participants: Takahashi, Uchiyama, Fabian, Lucia, Washimi, Tanaka, Ushiba, Aso == Summary Report == === Type-A === * Offloaded the GAS filters in IX. * Testing the heater control in IY. === Type-B === * BS sensor correction implemented. It seems to be working fine. Noise budget and a deeper analysis of its performance are ongoing. * In BS too, tentative blending filters could be implemented and tested next week. * I tracked down the location of the data used for the calibration of BS geophones. I'll do the calibration again, just for our information. * I compared the geophone outour in SRM, SR2 and SR3. They are all similar but there are differences. I'll check again next week. * In SR2, I did IP LVDT and actuator diagonalization. The difficulty is that the resonance frequencies in L and T are both very close to 66 mHz. Some coupling reduced, but from Y to T, actuation coupling increased to 20% of the resonance in T. I want to revert to previous values of the diagonalization matrices. === Type-Bp === * PRM: mechanical suspension models of TM have been uploaded on the filter banks. * Control filters for strong damping is ready to be tested next week === Type-C === === Electronics === * Prototyping the geophone pre-amp. === Control === == Schedule == * Type-A: Investigation of ACCs. * Type-B: Optimization of IP controls. * Type-Bp: Test of filters. * Type-C: == Safety == == Discussion == == Travel Plans == (Date in Kamioka) The week from 10/17 * Takahashi: 10/17-19 * Hirata: 10/18-21 * Sato: 10/18-21 The week from 10/24 * Takahashi: * Hirata: * Sato: == Next meeting == * 2022/10/21(FRI) 13:30