<> = Agenda/Minutes = [[https://zoom.us/j/203743987|Zoom Meeting]] ---------- = CRY+VIS Interface Meeting = Date: 2021/9/24 13:00- Participants: Takahashi, Uchiyama, Sato, Aso, Akutsu, Ushiba, Tomaru, Yasui, Yokozawa, Ikeda, Kimura [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] == Schedule == * IX: Health check. Investigating the disturbance. Effect due to the convection will be checked. Diagonalization of IP is not good. * EX: Health check. Installation of ACCs will be scheduled after the health check. * IY: H4 geophones for IY/EY were delivered. One of them will be used in OMC chamber temporally. * EY: F0 FR should be modified. == Status == * TM height setting: Summary of adjustable height range. * Commissioning in air: Health check. * Commissioning in vacuum: * Overall commissioning: * Acceptance check: * PF actuator: At the in-vacuum commissioning. * New vacuum pumps for V-chambers: * Heater control: Box covers for the adapter were installed. == Discussion == ---------- = VIS Meeting = Date: 2021/9/10 14:00- Participants: Takahashi, Sato、Fabian, Uchiyama, Aso, Sugiyama, Terrence, Hirata == Summary Report == === Type-A === * Health check in IX and EX. === Type-B === * SRM * We reported before a problem with a RM coil. * Last week we assessed the problem was one of the three cable segments used. * This week we we implemented a work around: instead of using the usual pins 2 and 7, we changed the pins to places 1 and 6 for segments 2 and 3. * Although it's possible to switch back to pins 2 and 7 in the upper connector of sengment 2, the connector is in an ackward place and we preferred to leave it alone. * Yasui-san and Ikeda-san provided an in-air robust adapter. * SR2 * We reported before that an OSEM coil had a slightly larger resistance than expected. * This week we identified the source of the problem: the pins in a male connector are not making good contact. * The connector is at the base of the preisolator and it's easy to access and fix. * We'll fix it next week. === Type-Bp === PR3 * There was an earthquake on September 19th that changed the pitch of the mirror. * We aligned the mirror such that the oplev beam was again at the centre of the tilt QPD. * However, V1 OSEM went out of range with 300 counts. * A measurement of IM-Y transfer function suggests that the OSEM flags are not touching their bodies. * Before adjusting the position of the V1 OSEM, we decided to try to bring it into range by tilting the BF and IM and adjusting the height of the BF. * We replaced a broken flip adapter keeping one of the BF picomotors from working. === Type-C === === Electronics === === Control === == Schedule == See [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Schedule|Schedule]] * Type-A team: Health check in IX and EX. Assembly of H4 geophones for IY and EY. * Type-B team: BF picomotor in PR3, OSEM coil in SR3, BS outerframe. '''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 == * Effectiveness of ”BS outer frame" reinforcement. [[attachment:rev_BS outer frame(recalculation).pdf]] == Travel Plans == The week from 9/27 * Takahashi: 9/27-10/1 * Sato: 9/27-10/1 * Hirata: 9/27-10/1 * Yano: 9/27-10/1 The week from 10/4 * Takahasdhi: 10/4-8 * Sato: 10/4-8 * Hirata: 10/4-8 * Yano: 10/4-8 == Next meeting == * 2021/10/1(FRI)