= Agenda/Minutes of the VIS Meeting on 2016/12/2 = 2016/12/2 13:30 - Participants: Hirata, Takahashi, Okutomi, Shoda, Sato, Tanaka, Fujii, Enzo, Mark, Fabian, Aso, Raffaele, Akutsu == Progress report == Schedule Chart ([[https://www.dropbox.com/s/4eg4yrl66h264so/VIS%20Overall%20Schedule-20161130.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/fskqtns6bzvw6k8/VIS%20Overall%20Schedule-20161130.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]] * Installation: The first transportation to Y-end for Type-A items is scheduled on 7-9th. The second one is scheduled in early January. * Pre-isolator: Cable connection and check were finished. Two sets have been shipped on 1st. * EQ stop, release sensor, dummy payload: The parts remained will be delivered on 12th. * BF damper: The production is on going. * Maraging wire: Ordered. The first set will be delivered by 20th January. * Tooling for installation: The hoist tool was ordered. === Type B (Mark) === * Mark worked on task lists and schedule. * Mark worked on an update of the BS Electronic Items doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111|E1505111]]) and started a SRx Electronics Items doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5886|E1605886]]). * Mark did a summary spreadsheet of Takahashi-san's cable orders to see what needed to be ordered immediately (new BS TM OSEM cables; geophone adapters) and later (for SRx). * Mark worked on an update of the In-Vacuum Cable doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901|E1503901]]), including information on final lengths that Fabian and Hirata-san had decided when making adapter cables. * Mark considered an alternative cabling scheme for the geophones (with a different adapter cable to put the signals and power on different lines and a matching unscrambler) but ended up concluding that the existing design would probably be OK. See [[attachment:00 Revised Geophone-v2.PDF]]. * Fabian worked on a redesign of the EQ stops for the BS (2 of 4 screws under the RM are opposite large holes and there are no screws to restrain the RM front/back at either top or bottom). * Hirata-san worked on PR/SR mirror box modifications with Shoda-san (on-going). * Hirata-san partially assembled a bottom filter for use in fit tests of the PRx BF recoil mass. * '''Need to order geophones immediately (Takahashi)''' === Type-Bp (Shoda) === * Installation preperation * Flag removing is postponed because we found that some of the parts are required to be re-manufactured. <
> We will try again at 9th Dec. * New assembly frame will be constructed on 12th and 13th Dec. * Flag/Wire breaker glueing will be done on 15th and 16th Dec. * Hopefully, the mirror will be sent to Kamioka on 19th and we can start hanging from 20th Dec. (19th is extended chief MTG.) * Design * For the installation of the main suspension chain, a clean chain block is ordered. Pararelly, removable jacks on the inner frame is being prepared. * 3D design of the mirror box modification is almost done. 2D drawings have to be prepared. * PR3 will be returned to Mitaka today. Need to transport it to Kashiwa. === IMMT (Ohishi) === *Schedule * Most of the parts will be assembled and delivered to Kamioka on 28th Dec. * Dec 20th：Processing completion * Dec 21th-22th：Assembly * Dec 26th ：Optional extra day * Dec 27th：Shipping * It depends on the mirror and jig status, but I think the mirror will be hung without magnets/standoff for initial alignment scheduled in January (Need to be confirmed). * '''We need to suspend the mirrors with magnets and standoffs. Will arrange with Hirose-san for the gluing work (Aso)''' * Hanging and installation will start from 4th January. * Two people from FCL are coming for hanging and installation till 12th January. * Mirror * Need to contacted with Hirose-san: * IMMT1: Ø: 99.77 mm; Thickness at thinnest point: 51.76 mm; Wedge: 2.45° * IMMT2: Ø: 99.75 mm; Thickness at thinnest point: 52.93 mm; Wedge: 2.45° * Thickness of the mirrors are 1.17mm different. * Magnet and standoff fixture jig * Plan to modify MC jig * MC jig: perhaps still in Kashiwa. * Need at least two new parts and two sims for different thickness of the mirror. * Hanging jig * Now in Mitaka. Will be delivered to Kamioka by Tatsumi-san. * Drawings * will be uploaded to dropbox. * Remaining parts status * PZT holder: asked FCL to make quotation. * coil holders: drawings exist. need to check before ordering. * D-sub holders; We had two holders but now one of it was used for MCo. Need to make another one. * Hanging and Installation Procedure: * Because it is difficult to install IMMT2 from side flange, we are planning to install IMMT2 from the top flange. * Need discussion with Hirose-san about cleanliness control. * IMMTs are not on the center line where crane moves. So perhaps we need to move IMMT by hand after we install it from the top flange. * Prepare hanging and installation manual next week. * Place for hanging: * Unfortunately I could not have find breadboard(GIF) legs. * Ask Kawamura-san if I can use small optical table that was used at MC recently replaced with larger optical bench. * Cables: * For initial alignment, planned in January, I think only Pico-motors will be necessary. 　　(Need to be confirmed; Coils will not be used for initial alignment.) * There already cables used when it was used for iKAGRA ETMs. * Check the place where cables are now; flippers are in branch office. * Check Flange * Digital models * Have not prepared yet. * IMMT picomotor drivers are located in Mozumi now. * Miyo-san said he already setup IP for IMMT drivers and will prepare network port in IOO rack next next week. * Others * Nippon Tungsten Company will give us sample of wires. * Pushers: Ask MIF to prepare it. * IMMT2 frame were modified to secure +/-1cm range for pico-motor. However, IMMT1 frame were not modified so the range is +/-5mm (originally). === Watchdog system (Tanaka) === * Test on the central power supply shows that the regulator chip is over heated. * Preparing a test for a smaller power supply circuit put on each WD board. === Safety === * Incidents: * Foreseen risks: * BS: will avoid any dangerous work because there will be only two people * Type-A transportation: Carefully watch the company workers. Insist to handle the items carefully. == Discussion == * Mirror box modification * Shoda-san showed the current design. Basically the design seems OK. * The modification of the mirror box (shorten the rods and modify the lids) is difficult to do quickly because mirrors are already in the boxes. * We will postpone the modification of the mirror box to after the test hanging is started * Other modifications (tying the sliders together, adding pulling screws to the RM base and adding fixing screws for the RM) will be performed before the test hanging starts. * '''Mark will send the RM base parts from Kamioka on Monday. Shoda-san will send Mark details of what to look for where'''. == Site work plan for the next week == * Mon: BS * Tue: BS * Wed: BS/Type-A transportation * Thu: BS/Type-A transportation * Fri: BS/Type-A transportation == Travel Plans == * Travel (Week of 12/5): * Takahashi: 12/6-12/9 * Shoda: 12/7-12/8 f2f, 12/9 Kashiwa * Mark: 12/5-12/9 * Fabian: 12/5-12/9 * Okutomi: 12/7-12/8 f2f * Fujii: 12/7-12/8 f2f * Ishizaki: 12/6-12/9 * Hirata: * Sato: * Enzo: 12/7-12/8 f2f (Hongo) * Ohishi: 12/5-12/6 Hongo * Travel (Week of 12/12): * Takahashi: * Shoda: 12/12-13 Assembly frame, 12/15 or 16 (Kashiwa) * Mark: 12/12-12/16 (depending on BS vs SRx progress) * Fabian: 12/12-12/16 * Okutomi: * Fujii: 12/15 or 16 (Kashiwa) * Ishizaki: * Hirata: * Sato: * Enzo: 12/12-12/16 (for Type B ) * Ohishi: == Next meeting == On 2016/12/9(Fri)