<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date: 2021/6/4 13:00-13:35 Participants: Takahashi, Ikeda, Sato, Hirata, Ushiba, Miyo, Yokozawa, Kimura, Node [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * IX: H4 geophone should be replaced. To alignment of IFO, it is necessary to enter the cryostat. * IY: Cryo-payload was installed on 5/31. Cryostat will be closed on 6/7-9. Schedule: Release of cryo-payload was scheduled on 6/10. * EX: New collimator for Oplev was tested. Schedule: Adjustment of Yaw FR was scheduled on 6/9. * EY: Installation of tower was almost finished. Cleaning inside the cryostat was finished. Pure water generator was delivered. Handling jig is under manufacturing. == Status == * Corrugate tube fixing jig: Other 3 sets will be ready by the end of June. * TM height setting: External review? * Commissioning in air: The first priority is damping of PR3. Making the auto TF measurement. * Commissioning in vacuum: * Overall commissioning: * Acceptance check: Group work is set every Friday. Maintenance day also will be set on Friday. * PF actuator: After SC. * Jig for FC painting: * New rack in 2F: Schedule? == Discussion == ---------- = VIS Meeting = 14:00-14:25 Participants: Takahashi, Miyo, Hirata, Sato, Fabian, Sugiyama, Terrence, Tanaka, Ishizaki == Klog == This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py. == Summary Report == === Type-A === * Connected the wire for cryo-payload in IY. * Implemented the limit SWs and F0 FR in IY. * Assembled the additional geophone pods in IX. * Implemented the limit SWs and F0 FR in EY. * Adjusted the tilt and load of IP in EY. * Calibrated the BF damper in EY. === Type-B === === SR2 === * In F0 FR, we set the hardware limit switches in suitable positions. * We changed the F0 keystone heavy top plate for a lighter one because at zero, the FR was almost at its upper limit. * We adjusted the amount of ballast mass on top of the F0 keystone. * At the end we got * Hardware limit switches trigger at: [ -2,072,149 ; 1,018,568 ] steps * Software limits: [ -2,050,000 ; 1,017,000 ] steps * '''F0 LVDT: [ -977 , 929 ] µm.''' * '''Buoyancy effect is 182 um.''' * We set the GAS filters in zero and measured the height of the mirror. '''It is approximately 0.95 mm above the nominal level (Terada-san's mark)'''. This value is consistent with previous measurements. We will lower the pre-isolator by this amount on Monday. * We measured the position of Tereda-san's mark with respect to the center of the flange: it is off by 1 mm, which is fine given the laser level line thickness. === SR3 === We set the F0 FR upper hardware limit switch in place. === Type-Bp === Hirata-san and Yano-san placed alignment beam targets in PR2 and PRM suspensions. === TypeC === * Aligned the IMMT suspensions. === Electronics === === Control === == Schedule == See [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Schedule|Schedule]] * Type-A team: IY(Release of cryo-payload), EY(F0/IP tuning), EX(Yaw FR adjustment) * Type-B team: SR '''Milestone''' * ''IMC suspensions are ready in air [40]'' will finish 2021/04/21. * ''PRs are ready in air [643]'' will finish 2021/07/09. * ''ETMX is ready in air [656]'' will finish 2021/08/25. * ''ITMX is ready in air [657]'' will finish 2021/08/31. * ''ETMY is ready in air [658]'' will finish 2021/09/16. * ''ITMY is ready in air [659]'' will finish 2021/11/08. * ''BS is ready in air [691]'' will finish 2021/11/24. * ''SRs are ready in air [663]'' will finish 2021/12/20. * ''Output suspensions are ready in air [695]'' will finish 2021/12/21. * ''TMSY is ready in air [708]'' will finish 2021/??/??. * ''TMSX is ready in air [684]'' will finish 2021/??/??. 2021/03/29 updated == Safety == == Discussion == [Terrence] * Suspension commissioning documentation progress (link [[https://github.com/gw-vis/vis-commissioning-tex|here]]): * Basic method sections (almost finished) * Sensor noise estimation * Frequency series modeling (Transfer function and spectrum modeling) * Sensor and actuation diagonalization (will include examples later) * Inter-calibration (will include examples later) * Sensor fusion: complementary filters and sensor correction (In progress) * Time series simulation of known noise PSD (In progress) * Control design (In progress) * More? * Advanced methods (Will fill those in slowly) * Mode extraction using dynamic mode decomposition (Very simple algorithm that can extract resonance frequeniessss and damping timessss from a noisy time series) * Control optimization, filter optimization, optimal control methods, how do we get the best control performance out of our crappy sensors? (My research). * PReQua. * More? * What happened to the meeting? == Travel Plans == The week from 6/7 * Takahashi: 6/7-11 * Sato: 6/7-11 * Hirata: 6/7-11 * Yano: 6/7-11 The week from 6/14 * Takahashi: 6/14-18 * Sato: 6/14-18 * Hirata: 6/14-18 * Yano: 6/14-18 == Next meeting == * 2021/6/11(FRI)