= Agenda/Minutes of the VIS Meeting on 2020/9/18 = 2020/9/18 13:30 - 14:40 [[https://zoom.us/j/203743987|Zoom Meeting]] Participants: Takahashi, Sato, Aso, Hirata, Miyo, Tomaru, Akutsu, Ushiba, Fabian, Terrence, Shoda, Washimi == Interface between VIS and CRY == * Interface meeting was set to discuss about the integrated CAD model, the link between Cryo-payload and Type-A tower, the schedule, and so on. Mainly in Japanese for the engineers. * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]] * VIS team plan to test the ribbon heater on the cross tube in IX or IY just before the vent of chambers. * Acceptance Test ([[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Acceptance%20Test|Wiki page]], [[https://www.dropbox.com/s/6bv15yy6hg0wn40/Acceptance%20Test%20Documentation.docx?dl=0|Inspection document style]]). The check points with criteria should be reviewed. * The schedule will be discussed in the next meeting. == Progress report == === General === === Type-A === * Planing a test of the ribbon heater on the cross tube in IX or IY just before the vent of chambers. === Type B === * Mark finished checking the paper. I'll submit it within a few days. * Preparation work with suspensions: * In BS, SR2 and SRM GAS filters I offloaded coil-maget actuation onto fishing rods (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15027|15027]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15039|15039]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15042|15042]]). * In BS F1 I was able to move the keystone down to 230 um. Before the lowest the FR would allow was 488 um. I changed the setpoint accordingly and together with Miyo-kun I updated BURT and SDF files (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15027|15027]]). * The temperature was relatively high at the moment (above 24 degrees; klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15040|15040]]). I told Moyoki-san and he installed coolers (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15043|15043]]). The temperature has been dropping since then (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15052|15052]]). It's now 23.2 degrees arond BS. * I'll offload again once the DC actuation in GAS filters stops drifting. * I'll measure IP resonant frequencies again. * I told Takahashi-san about the yokes in BS IP coil-magnet actuators. They require cleaning and nickel coating. * I went to the tunnel with Miyo-kun and cheked the holders for the gauge dials. We'll need to but longer rods. I'll let Takahashi-san know. * Highlight in documentation: * Shoda-san, Takahashi-san, Hirata-san and Miyo-kun gave me feedback about the document. Thank you very much! B) * An overall BS procedure is now readable. * Hirata-san checked the section about the Lower Breadboard (LBB) and provided a picture for SR3 section. * I added a secton on how to set the fishing rods to mid-range position. * During installation we measured the total range of the motor in number of steps. * For the FRs that are at the end of their ranges we just have to move them by half of the total range. * I added a section about monitoring the IPs during venting. I got feedback and updated the document. === Type-Bp === === Type-C === === Controls === * Real-time model modification for Type-B/Bp is suspended due to the RSE Trial now. === Electronics === == Towards O4 == * KAGRA is in "RSE Trial" now. * Procedure documents. * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5500|Type-A tower installation]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11598|Limit switches]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11520|Limit switch connecting guide]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11978|Replacement of TF blades]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11878|Wire gluing in PR3]] * [[https://onedrive.live.com/?authkey=!AOLVVVKJ_Zpn-2c&cid=1447B05D5B571A84&id=1447B05D5B571A84!26691&parId=1447B05D5B571A84!26683&o=OneUp|Type-B remedying work]] * Preparation work. * The preparation work will be started on Oct. 1st. * [[https://www.dropbox.com/s/fxeig8e8aicjnc4/Booth%20cleaning.pdf?dl=0|Schedule and assignment of personnel]] * [[https://paper.dropbox.com/doc/Plan-for-cleaning-the-clean-booth--A73isqnLjN32leQb4nFiuN~BAg-KVEbnCCBASYy4ea78HBUH|Cleaning procedure]]. * When you make inventories, indicate [[https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0119/E2011960/002/KAGRA_Cleanbooth_Segment_Name.pdf|the segment name]]. * Schedule towards O4. * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11475|Two cases]]. cf. Post Obs. task ([[https://docs.google.com/spreadsheets/d/1w4q8OvX9E6nkYSgshLYLoZH5yvQXHvGmL1agux8ztx0/edit?usp=sharing|Request]]), Task for O3c ([[https://paper.dropbox.com/doc/Plan-for-the-long-OR-brake--AxxlJFvK1IGJjqrG5nfdHfGXAQ-KqexeqMaCA7DITFGxA5ih|Plan]], [[https://www.dropbox.com/s/hoadb73fdyah02c/Post-O3%20task.xlsx?dl=0|Sheet]]), Task towards O4 ([[https://www.dropbox.com/s/60oygtwmckmdyj6/Towards%20O4%20on%20VIS%20.xlsx?dl=0|List]]) == Safety == == Discussion == == Travel Plans == The week from 9/28 * Takahashi: 9/30-10/2 * Sato: 9/30-10/2 * Hirata: 9/30-10/2 The week from 10/5 * Takahashi: 10/5-9 * Sato: 10/5-9 * Hirata: 10/5-9 == Next meeting == * On 2020/9/25(Fri)