= Agenda/Minutes of the VIS Meeting on 2018/7/27 = 2018/7/27 13:30 - [[https://zoom.us/j/203743987|Zoom Meeting]] Participants: Mark, Takahashi, Ohishi, Pena, Sato, Enzo, Lutia, Pan, Tellence, Fujii, Hashimoto, Panwei, Ishizaki, Hirata, Tanioka, Shoda, Okutomi, Akutsu, Eleonora, Tanaka == 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 ==== [Y-front] * Implemented the cabling in the F1. * Mounted the F1 on the end plate. The filter chain was suspended from the F1. * Calibrated the LVDT in the F1. * Implemented the cabling between the F1 and the F2. * Tuned the F1. Initially the proper frequency was 0.57Hz. * Added the compression to 8 blades by 0.5mm, The F1 went to the bi-stable. * Decompressed 4 blades. The proper frequency became 0.44Hz. * Closed the cup and suspended the F1 by crane. The keystone went to the lower limit. * Replaced the blades for the FR from the F2 type to F1 type. * Finally the proper frequency became 0.35Hz (corresponding to the tuning frequency of 0.22Hz) with the cup. * Checked the FR range. The FR can cover the full range of keystone. * Implemented the cabling around the F1. * Found that the primary coil was touching to the secondary coil in the F2. It was repaired. * Lifted down the EQ stop into the corrugate tube. The end plate for F1 sit on the frame lock. [X-front] * Attached the additional FR on the TF. * Adjusted the height of keyston in the TF. ==== Plan for coming weeks ==== * Setting of the pre-isolator. * Calibration of the LVDTs for BF damper. === Type B (Mark) === ==== Report for week of 7/23 ==== * We finished adding cable clamps to the SR2 PI and SF. * We craned in the SR2 PI and installed the PI-SF rod. As expected, there was not quite enough load capacity for even a 2 Cu-segment SF. * We changed the CuBe spring on the SR2 PI from an F2 type to an F1 and got about an extra 2 kg, which is plenty for 2 Cu segments. * We moved the feedthroughs from the SR3 assembly frame to the SR3 tank. Mirapro then moved the assembly frame to the SRM area. Mirapro also moved the duct on the +Y side of the SR3 tank to give us access to that side. * We laid a new set of SR3 in-air cables running directly to the tank. (We will repurpose the original set for SRM.) * We reconnected the SR3 cables on both sides of the feedthroughs. We had to adjust the routing of the in-vacuum ones several times to stop them touching the tank, but we finally found a good solution. * With help from Ohishi-san we removed the First Contact and then unlocked the whole suspension by stages. We need to check the optic pitch and do a little more mechanical adjustment but we were able to take TFs and implement IM and GAS control filters. * Hirata-san and Fujii-kun received most of the SRM metal mass parts, did inventory and practiced some of the key steps in the assembly, especially inserting the Sol-Black coated parts without touching the delicate surfaces. * Mark did inventory of the BIO stuff for the WD and of the OL parts. ==== Plan for week of 7/30 ==== * Mark, Enzo, Hirata-san, Fabian, Kozu-kun, Terrence, Panwei at Kamioka Mon-Fri. * Kozu-kun works at Mozumi Mon, Fri, and Thu afternoon. ===== SR3 ===== * Finalize optic pitch, OSEM alignment. * Hook LBB, add ballast mass, set up temporary OL (horizontal beam, pitch/yaw only). * Identify/acquire items required for final OL (steering mirrors, second QPD, lens, collimator). ===== SR2 ===== * Fix issue with PI/SS/chain alignment. * Put magnets on SR damper ring (2 Cu segment pattern). * Remove PI-SF rod temporarily, install Cu segments and damper ring. * Do vertical height budget; choose optimum F0 keystone height. * Add estimated final ballast mass. * Do PI cable routing. * Adjust ballast/trim mass, with reserve for cables. ===== SRM ===== * Set up filter tuning area. * Tune F0 for SRM. * Add LBB blade units, cable clamps etc. * Check PI coil connections, IP LVDT magnets. ==== To-Do Lists, Schedule ==== * [[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 Type B Schedule (SR)]] ==== Vacation Info ==== * Terrence: 8/24-26 f2f, then returns to Hong Kong. * Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile. === Type-Bp (Shoda) === ==== Past week report ==== ==== Plan for coming weeks ==== === OMMT & OSTM (Ohishi) === ==== Past week report ==== ==== Plan for coming weeks ==== === VIS electronics (Tanaka) === ==== Past week report ==== *Delivery of ordered goods is completed. *NPort5150A(Serial server) for Stepper Motor Driver.-->1 unit 7/26. (Others units were received by post(U-pack)form Kamioka. but 3 units of TMCM-6110(6 axes Stepping motor driver unit) didn't use.) *I completed manufacturing order to vendor.-->Stepper Motor Driver 3units.7/24. *S-Number:JGW-S1808437,JGW-S1808438,JGW-S1808439 ==== Plan for coming weeks ==== === Other site works === * Sept 10(Mon): Planned power outage === Safety === * Incidents: * Foreseen risks * Type-A: * Type-B: == Discussion == ==== Horizontal position of cryo-payload ==== * AOS group worry about the relative position of the recoil mass (RM) and the WAB (https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8538). * When we set the horizontal position of cryo-payload finally, we need to adjust the position of IP by the stepping motors so as to keep the nominal relative position of the RM and the WAB. == Travel Plans == * Travel (Week of 7/30): * Takahashi: * Okutomi: * Sato: 7/30-8/3 * Lucia: * Ishizaki: * Mark: 7/30-8/3 * Hirata: 7/30-8/3 * Enzo: 7/30-8/3 * Panwei: * Terrence: * Shoda: * Ohishi: * Fujii: 8/1-8/3 * Tanioka: * Tanaka: * Kozu (ICRR): * Arai (ICRR): * Travel (Week of 8/6): * Takahashi: 8/6-10 * Okutomi: * Sato: 8/6-10 * Lucia: * Ishizaki: * Mark: 8/6-10 * Hirata: 8/6-10 * Enzo: 8/6-10 * Terrence: * Panwei: * Shoda: * Ohishi: * Fujii: 8/6-10 * Tanioka: * Tanaka: * Kozu (ICRR): * Arai (ICRR):