= Agenda/Minutes of the VIS Meeting on 2018/4/6 = 2018/4/6 13:30 - 14:50 Participants: Enzo, Shoda, Takahashi, Aso, Tanaka, Okutomi, Sato, Tanioka, Fujii, Ishizaki, Hirata, Mark == Progress report == === Schedule Chart === Type-A : ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7320|PDF/MPP]]) Type-B: ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|PDF/MPP]]) === Type-A (Takahashi) === ==== Past week report ==== [X-front] * Lifted up the EQ stop to access the F3 and recovered the touching problem in the F3. * Lifted down the EQ stop again. Extended the EQ stop to the F1 stage. * Tuned the F1. The lowest frequency was 0.45Hz. When the filter was suspended with the cap, it went to the bi-stable. * Decompressed the blades. Finally the frequency was around 0.5Hz. * Checked the FR in the F1. Adjustable rage of keystone was +/- 4mm. * Cabled around the F1 and checked the cable connection. * Lifted down the EQ stop. The end plate for the F1 was sit on the frame lock. * Extended the EQ stop to the top ring. [X-end] * Adjusted the height of filters. * Connected the PT100 sensor to the monitor line for CRY. * Check the FR range in the BF. ==== Plan for coming weeks ==== [X-front] * Set the bridge frame. * Prepare for the pre-isolator. === Type B (Mark) === ==== Report for week of 4/2 ==== * Fujii-kun and Yamamoto-kun got the SR3 real time model running. * We received the SR3. * However Mark and Tanioka-kun found Hirose-san had applied the First Contact patterns on the wrong sides, so we took it to Yamamoto-san's lab and Toyama University and re-applied the FC properly. We also bounced a 1064 nm beam off it to verify that the HR and AR coatings were not also swapped (they were OK). * We made magnet-standoff assemblies for both SR3 and SRM, and set up for gluing the prisms and magnets. We will attach the prisms and magnet-standoffs on Monday. * Hirata-san did inventory of the SR3/SRM payload parts received last week and started on the inventory of screws. * Fujii-kun, Enzo and team finished the preparation, adjustment of the SFs and BFs. * They calibrated one SF and BF. (The remaining one SF and BF will take about another day. Also, the FR stops need to be checked.) * Enzo and Kozu-kun finished setting up the SR3 and SRM racks. (The SRM rack still lacks a front-end, and power and network connections, but the SR3 is now ready for testing.) * Shoda-san worked on getting quotes for the ballast masses, on design of the SRM metal mass, and on splitting the BS model to reduce the load on the front-end computer. ==== Plan for week of 4/9 ==== * Shoda-san at Mitaka * Fujii-san at Mitaka * Tanioka-san at Kamioka, but possibly doing PEM stuff. * Others at Kamioka * -- * Finish SRM BF and SF calibration * Finish IMs and IRMs * Glue SR3 mirror ==== Plan for week of 4/16 ==== * Shoda-san at Mitaka * Fujii-san at Mitaka * Tanioka-san at Mitaka? * Others at Kamioka * -- * Build 1xRM * Start SR3 Hang * Align assembly frame. ==== Plan for week of 4/23 ==== * Shoda-san at Mitaka * Fujii-san at Mitaka? * Mark, Enzo at Kamioka * Hirata-san at Mitaka * Tanioka-san at Mitaka? * -- * Clean parts (cable clamp bases, etc, etc). * Observe KAGRA Phase 1 operations, assist if problems arise. ==== Plan for week of 4/30 ==== * Golden Week! ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/March2018]] * [[KAGRA/Subgroups/VIS/TypeB/April2018]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]] ==== Vacation Info ==== * Fabian vacation, 3/26-4/27 (then gone). === Type-Bp (Shoda) === ==== Past week report ==== * I found that the most of the magnet direction of PRM IM flag are facing wrong. We should fix the consistency with the compensation magnets at some point. * We will schedule this work in June - July time frame. * Two days are required to complete the task ==== Plan for coming weeks ==== === OMMT & OSTM (Ohishi) === ==== Past week report ==== ==== Plan for coming weeks ==== === Watchdog system (Tanaka) === ==== Past week report ==== ==== Plan for coming weeks ==== === Other site works === * Monthly crane inspection: 11:30 - 12:30 April 16 === Safety === * Incidents: no incident * Foreseen risks * Type-A: Crane * Type-B: Working with springs == Discussion == * ETMY repair * F1 and F2 may be dead (the GAS is stack) * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8125|Noise calculation]] by Okutomi * Two peaks go above the requirement (with a safety margin of 10) near 10Hz. * This excess noise seems to be acceptable * Propose to postpone the repair of ETMY to after O3 at the extended chief meeting. * F2F talk * Request two slots (30min) * Type-A (10min), Type-B (10min), Control (10min) == Travel Plans == * Travel (Week of 4/9): * Takahashi: 10 - 13 * Okutomi: 9 - 13 * Sato: 9 - 13 * Ishizaki: 9 - 13 * Mark: 9 - 13 * Hirata: 9 - 13 * Enzo: 9 - 12 * Shoda: * Ohishi: * Fujii: * Tanioka: 9 - 13 * Tanaka: * Kozu (ICRR): 9 - 13 ? * Arai (ICRR): * Travel (Week of 4/16): * Takahashi: 16- 20 * Okutomi: 16- 20 * Sato: 16- 20 * Ishizaki: 16- 20 * Mark: 16- 20 * Hirata: 16- 20 * Enzo: 16- 20 * Shoda: * Ohishi: * Fujii: * Tanioka: * Tanaka: * Kozu (ICRR): 16- 20? * Arai (ICRR): == Next meeting == On 2018/4/13(Fri)