= Agenda/Minutes of the VIS Meeting on 2018/1/19 = 2018/1/19 13:30 - 14:45 Participants: Sato, Ishizaki, Takahashi, Ohishi, Aso, Mark, Enzo, Fabian, Okutomi, Tanaka, Shoda, Hirata == Progress report == === Schedule Chart === Type-A : ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7320|PDF/MPP]]) Type-B: ([[TBD|PDF]],[[TBD|MPP]]) === Type-A (Takahashi) === ==== Past week report ==== [Y-end] * Connected the PT100 sensor for BF to the monitor system for CRY. * Checked the yaw rotation in BF. No problem. [X-front] * Installed the main items (footholds, workbench, chairs, tools, etc.) into the clean booth. * Attached the release sensors onto the end plate for DP with cabling. * Started the assembly of side stopper. The parts for slider had a problem (too tight). [SRM] * Took out the IP and TF from each box. * Found the blades (2 of 3) for TF were broken (completely cut off). The blades were removed. * Combined the IP and the TF. Connected the IP legs with the TF plate. * Cabled the vertical LVDT coils. * Fixed the upper plate of LVDT-Actuator units onto the TF plate. * Assembled the fishing rod of TF with cabling. * Assembled the yaw rotary of receptacle in the TF. * Packed the PI into the box. ==== Plan for coming weeks ==== * The evacuation of EYV chamber will be started in the 23th morning. * Pre-assembly of BF damper. * Assembly of DP stage. === Type B (Mark) === ==== Report for week of 1/15 ==== * We set up the QPD for the OL, initialized the OL and TM sections of the RTM, and did TFs from the TM OSEMs to the OL. * Initially we had no coherence, but we debugged issues with the watchdog, LPCD, and DAC board and then got good TFs. * We lifted the IM/RM/SR with the load gauge adapter and checked the weight, which was close to the mass budget. * We installed the section of the AF above the IM, and the BF cross bars and jacks, and craned in the BF. * We installed the BF-IRM rods, IRM, BF-IM rod, flying saucer and the cable clamps on the bottom of the BF. * We hooked the IM section, but found it was heavy by several hundred grams. We also noticed the BF keystone had a noticeable tilt of about 1.2 mm (high on the +X side). * We removed 738 g of trim mass and found that load rose and sat about 2 mm high. So the discrepancy is of order 500-600 g. * Shoda-san, Enzo and Kozu-kun made and characterized a batch of OSEMs. * Hirata-san finished drawings for the improved BS PI yaw/vertical adjustment, placed orders for damping ring receptacles and other items, and prepared the second SR BF in case we needed to swap it in. ==== Plan for week of 1/22 ==== * Fix or swap BF. * Route selected cables to flange. * Test IM picos and BF yaw pico. ==== Plan for week of 1/29 ==== * Enzo at Mitaka 1/29 and most of 1/30, then vacation. * Kozu-kun away. * All others at Kamioka. * Build IRM around IM. * Cable/test/adjust IM OSEMs. * Time permitting, do TFs from IM OSEMs to themselves and to optical sensor. ==== Vacation Info ==== * Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30) * Kozu-kun 1/29-2/2 === Type-Bp (Shoda) === ==== Past week report ==== ==== Plan for coming weeks ==== === OMMT & OSTM (Ohishi) === ==== Past week report ==== * Hanging jig parts arrived from FCL. Some minor problems need to be fixed. Drawings will be delivered today. * Visited machine shop of Toyama Univ. Asked them to make some mechanical parts. * Made a [[https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0076/E1807672/004/OMMT_parts_status2018Jan19.pdf|parts list]] and checked the status. Will update from time to time. * Vertical vibration isolation bellows. Firstly contacted with Mirapro but they cannot make the ones we are now using. I'll contact with NIPPON VALQUA INDUSTRIES, LTD. * Mirror status OMMTs will arrive soon. OSTM will be ordered next FY. Perhaps need half a year. ==== Plan for coming weeks ==== * Check hanging jig drawings. * Assemble the hanging jig. * Resume OSEM test. === Watchdog system (Tanaka) === ==== Past week report ==== ==== Plan for coming weeks ==== === Other site works === * Jan. 25: Monthly inspection of the cranes (11:30 - 12:30) * Feb 18: Black out of the Mozumi buildings === Safety === * Incidents: no incident * Foreseen risks * Type-A: Crane * Type-B: Crane * Type-Bp: None == Discussion == === Temperature sensors === * PR2, SR2 installed * PR3, PRM are not yet installed. Currently put in the front room. * BS sensor needs to be moved to the chamber * VIS team will do the maintenance (battery change) of those sensors === Broken SRM TF blades === * Check the blades for the ITM TFs if they have similar problems (Takahashi) * Check the BS TF blades when the next we open the BS chamber (Mark) * Send the broken blades to Virgo for inspection (Takahashi) * Check the number of spare blades for SR TF (Takahashi) * These blades are not Ni plated. May be rusted. We should consider how to treat them including thermal treatment after Ni plating for dehydrogenation. === Tilted BF GAS === * Swap the current BF with the second BF to see if it is tilted * Bring spare blades for SR BF from Mitaka to Kamioka (Hirata) * Prepare for the BF service work to balance the blades. === TF fishing rod === * Double blade configuration fixed the tilting problem for Type-A * We should implement the same configuration for Type-B * Need more fishing rod blades. Sato-san will order them together with the blades necessary for Type-A. == Travel Plans == * Travel (Week of 1/22): * Takahashi: 22 - 26 * Okutomi: 22 - 26 * Sato: 23 - 26 * Ishizaki: 23 - 26 * Mark: 22 - 26 * Fabian: 22 - 26 * Hirata: 25 - 26 * Enzo: 22 - 26 * Shoda: 22 - 26 * Ohishi: * Fujii: * Tanaka: * Kozu (ICRR): 22 - 26 * Arai (ICRR): 22 * Travel (Week of 1/29): * Takahashi: 29 - 2 * Okutomi: 29 - 2 * Sato: 29 - 2 * Ishizaki: 30 - 1 * Mark: 29 - 2 * Fabian: 29 - 2 * Hirata: 29 - 2 * Enzo: * Shoda: 29 - 2 * Ohishi: * Fujii: * Tanaka: * Kozu (ICRR): * Arai (ICRR): == Next meeting == On 2018/1/26(Fri)