= Minutes of the VIS Meeting on 2016/6/10 = 2016/6/10 13:30 - 15:00 @ Room 210 Participants:Takahashi, Ishizaki, Sato, Tanaka, Fabian, Mark, Fujii, Hirata, Shoda, Akutsu == Progress report == Schedule Chart ([[https://www.dropbox.com/s/vft4x2etccvy70h/VIS-Overall-Schedule.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/hvvby3p70eztmfd/VIS%20Overall%20Schedule-20160610.mpp?dl=0|MPP]]) === Type-A (Takahashi) === * Simulation: '''Ask Okutomi the status (Takahashi) ''' * Structural analysis of the frame lock was done. * EQ stop test * '''Confirm what needs to be done with Ishizaki-san<
>''' * '''Hurry up the production of the frame lock (Takahashi) ''' * Accelerometers check * Dismounted them from 3 of the TAMA SAS * Will work on the remaining 1 soon. * Standard filer * Measuring the optimal loads * Bottom Filter * Calculated the size of the blades * Finish the cutting by the end of July * Release sensor * Waiting for the samples to test === Type-B (Mark) === * Type B Past Week Summary * Fabian finished dummy BS assembly. * Mark and Tatsumi-san glued magnets into both types of BS optic flags, and discs into BS IM flags. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1815|klog]] Two optic flags had to be redone because the magnets moved while the glue was drying. Hirata-san helped remove the magnets with acetone in the ultrasonic cleaner. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1818|klog]] * Tatsumi-san, Fabian and Mark took the dummy BS to Kashiwa and glued the flags and prisms. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1821|klog]] We will check status on Mon 6/13. * Hirata-san moved in another filter for testing (but didn't get to measure it). * Hirata-san washed a batch of parts. * Hirata-san modified the design of the parts of the assembly frame supporting the BF and SF to include bushings for smoother movement. * Hirata-san researched and ordered a crane scale for use at the site. (We decided the 500-kg version of the 200-kg one used at TAMA. It is the same price and has the same 100-g resolution for the first 250 kg.) * Hirata-san worked on making some guide parts for the PI installation (Misumi parts with minor additional machining from ATC). * We finalized a design for simple SS mirror parts for the dummy BS with Akutsu-san. They will be made by ATC. * Mark worked on list of items for purchase in FY2016 and on the schedule. * Fabian did more work on the IM assembly. It is nearly done and he will start on the RM next week. Some issues with constructing pico adapters cables. * Type B ongoing issues * Wires * Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco. * OSEMs * Feedthrough Adapters * Need large quantity of male and female D-Sub 9, IDC ribbon connectors - Takahashi-san is getting a quote. * Can we make SR wire breakers bigger? * Fukushima-san will start on machining test soon (as of 5/27). * Not enough crane height problem (Hirata, Saito) - no action since last week * Installation stuff * Crane scale - ORDERED. * Work platforms - RECEIVED. * PI Guide parts - in manufacture at ATC. * Ballast masses for payload * Initial batch received - ordered extra smaller ones to allow for adjustments. * Lower breadboard stuff * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss. * Breadboard springs (in manufacture, expected end of July) * Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order. * Clean bag - expected 6/8. * Documents * 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]] * Site work plan * '''Start the preparation work from the week of 6/20 ''' === Type-Bp (Shoda) === * 3D CAD model (Original & Latest modified version) -> DONE: Uploaded to ROOM214 (Shoda) * 1st draft of the installation procedure for modified parts -> Ongoing (Fujii+Shoda) * Rough LVDT model -> DONE: under discussion * We found that the suspension points of the optical bench are required to be shifted -> Shoda will design new adapters. (Deadline: Mid July) === IMMT (Ohishi) === * Nothing === Watchdog system (Tanaka) === * Report of the experimental results and analysis(Resistance stability of PhotoMos Relay).[[http://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0052/E1605270/002/Project%20WDS%20Experiment%202016_06_10.pdf|http://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0052/E1605270/002/Project%20WDS%20Experiment%202016_06_10.pdf]] === Safety === == Issues == * Accelerometers for IP * NIKHEF accelerometer measurement results (Fujii) [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5271|Slides]] * The LVDT driver had wrong power supply voltages -> need to perform the measurements again * Type-B team will continue the noise measurements as well as the geophones * Fujii and Shoda will go to Kamioka on 27-29 June to transfer the information to the Type-B team * LVDT for BF damping * If we get the design from Virgo within this month, we will use the design * If not, we should make a design from scratch * Interference of the interferometer beams with VIS structure * Shoda is working on the new fixture design for PR: by mid-July * '''Need to check if there is a similar problem in SR (Mark)''' == Site work plan for the next week == * Mon: * Tue: * Wed: * Thu: * Fri: BS crane will not be available: 13th -14th of June == Travel Plans == * Travel (Week of 6/13) * Takahashi: * Shoda: * Mark: * Fabian: * Okutomi: * Fujii: * Ishizaki: * Hirata: * Ohishi: * Sato: * Travel (Week of 6/20): * Takahashi:19-21 (Acceptance of SFs, check items, move things around and so on) * Shoda: * Mark:20-24 (preparation for BS installation) * Fabian:20-24 (preparation for BS installation) * Okutomi: * Fujii: * Ishizaki: * Hirata:20-24(not yet decided) * Ohishi: June 27-29: Fujii, Shoda July 4 - 8: Takahashi, Ishizaki, Sato (site check for the installation of Type-A) Mark is away: July 8-20 == Next meeting == 2016/6/17(Fri) 13:30 - Next VIS F2F 6/17 Next next F2F 7/8