= Agenda/Minutes of the VIS Meeting on 2016/10/7 = 2016/10/7 13:30 - Participants: Takahashi, Tanaka, Fabian, Hirata, Mark, Aso, Fujii, Ishizaki, Sato, Akutsu == Progress report == Schedule Chart ([[https://www.dropbox.com/s/epcsah1yw5jl9og/VIS%20Overall%20Schedule-20161007.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/lcb0t4spdx64do2/VIS%20Overall%20Schedule-20161007.mpp?dl=0|MPP]]) === Type-A (Takahashi) === * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/Meeting|Minutes of Type-A Meeting]] * Pre-isolator: IPs and TFs were transported from Akeno to Mitaka on 3rd. One set of IP and TF were brought in the clean room. * Top filter was found damaged: a screw came out apparently from the vibration during the transportation. * We don't know when this happened. We will check the screws before transporting the remaining TFs from Akeno to Mitaka. * Spare parts to fix the broken part are available. * EQ stop, release sensor, dummy payload: Production is on going. * Bottom Filter: Assembly of the second BF is on going. SUS bearings were ordered. * BF damper: Asking a quotation to a company. The test report of LVDT prototype was uploaded ([[http://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0057/T1605707/001/BFLVDTtest_report20160920v1.pdf|report]]). * Maraging wire: We concluded that the load to the maraging wires during crane operation is small enough to keep less than 2G. === Type B (Mark) === * Type B Past Week Summary * Fabian, Mark and Liu-kun did BS installation at Kamioka: * Connected the DIO card to the LPCD. (Simulink model changes will be needed to make use of it.) * Took TF data from the TM-H1 coil output to the voltage and current monitors and found that the response was approximately flat, meaning that meaningful TFs can be taken of the RM/BS stage with no DIO. * Used the 90° prism and the optical lever to set the pitch of the RM to match the dummy BS. * Removed the RM trolley and added the bottom section of the security structure. * Lifted the IM/RM/BS with the load gauge adapter and load gauge and measured its mass. * Hirata-san: * Modified drawing of maraging rods for BS [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5706| D1605706]] * Made 3D models of stub flag gluing jigs. * Made 3D models and 2D drawing of BS BF-IM hexagon cable clamp assembly and cone parts. [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5734| D1605734]] * Washed parts and screws. * (For Type A) Assembled and adjusted blades of BF #9. * Mark checked lots of drawings by Hirata-san. * Mark worked on schedule but only succeeded in completely garbling the Type B section of the VIS schedule on the server. * Longer term to-do list * Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing. * Part "disk security" top has to be modified - screw positions do not match. * Write more of payload assembly procedure (Fabian) - ONGOING * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING * Lower breadboard installation to be incorporated into the procedure document. * Work on BS simulation (Fabian) * Do BS Simulink model (Mark, Kokeyama) - TM/IM/BF level DONE * Do 2D drawings of SR2 parts (Hirata) * Redesign SRx IM wire clamps for larger prisms, remachined RMs * Order SRM/PRM parts (Hirata/Shoda) * Order SRx fasteners (Hirata) === Type-Bp (Shoda) === * Modification Parts * I asked the ICRR desk to make an announcement for the open estimation. The call for cost estimation is announced today. * The result will be open on the beggining of the November. * The delivery date of the whole the parts will be in January. But I asked the possible companies to give us 1 set earlier. (I heard that it would be possible within this year.) * Mirapro * Hirata-san updated the wire design and hook design. Some other parts only used for Type-Bp should be also updated. * How to order is under discussion. * BFRM wires * Takahashi-san will make an order soon. * Mirror preparasion * Discussion about the jigs for removing the current flags from the PR3 and spare mirrors are ongoing with Hirose-san. (No progress this week.) * Flags * Hirata-san made the models. Checked and ordered soon. === IMMT (Ohishi) === * No progress this week. === Watchdog system (Tanaka) === * Finished the schematic design. Start working on the PCB design. === Safety === * No issue. == Discussion == * Maraging and SUS rod issue follow up. * Type-B Maraging rods: design is ready. Will be ordered soon (Takahashi) * SUS rods: design is ready. Will be ordered with the PR assembly frame (Takahashi/Shoda) * Type-A Maraging rods * Installation procedure review concluded that the rods will not get tension above the static load during installation. * We employ the safety factor of 2 as requirement. * Takahashi will explain this and ask Obuchi-san to re-optimize the shape after the meeting. * Neck diameter can be increased to keep the safety margin * We want to keep the nail head diameter <= 8mm as much as possible. * Takahashi will ask Ojima whether 9mm nail head is possible or not just in case we need to increase the nail head size. * IM OSEM noise issue (Shoda) * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5708|Slides]] * We need to tune the filters for length and yaw to reduce the noise coupling. == Site work plan for the next week == * Mon: Holiday * Tue: BS test hanging/Extended Chief Meeting * Wed: BS test hanging/Accelerometer test * Thu: BS test hanging/Accelerometer test * Fri: BS test hanging/Accelerometer test == Travel Plans == * Travel (Week of 10/10): * Takahashi: 11 -14 (Extended Chief Meeting/Accelerator check) * Shoda: * Mark: 10-14 * Fabian: 11-14 * Okutomi: 13 -14 (Extended Chief Meeting/Accelerator check/FE code development) * Fujii: * Ishizaki: * Hirata: * Sato: 12 -14 (Extended Chief Meeting/Accelerator check) * Ohishi: * Travel (Week of 10/17): * Takahashi: * Shoda: * Mark: 17-21 * Fabian: 17-21 * Okutomi: * Fujii: * Ishizaki: * Hirata: * Sato: * Ohishi: == Next meeting == 2016/10/14(Fri) 13:30 - VIS F2F: Oct. 28, Nov. 18, Dec. 2