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Participants: Participants:Fabian, Mark, Ohishi, Aso, Sato, Ishizaki, Tanaka, Hirata, Shoda, Raffaele, Akutsu
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  * What is the target of the simulation ? => Assess the effectiveness of the BF damper. Need to know the requirements.
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 * 5 blades for BF ->''' Ask Virgo people if they see any problem with it (Takahashi)'''  * 5 blades for BF -> "The filters in Virgo are different from the GAS filters (no compression). 3 + 2 combination is no problem." (by E. Majorana)
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  * There were multiple issues with the dummy BS flag/prism gluing [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1830|klog]]. The sapphire prisms will need to be removed and reapplied. Hirose-san is going to organize this. He tried the cup that had been made for the PR2 on the test bond on the dummy PR. It worked to contain the acetone and the prism came off in a few hours. He is going to have a up made to match the different RoC on the BS.
  * Akutsu-san provided stainless steel mirror panels for the dummy BS made by ATC.
  * Hirata-san added the optical layout information to the BS Inventor assembly. He requested tank information from Mirapro so he can continue to do SR2/3/M.
  * Hirata-san worked on the crane height problem with Saito-sensei. They concluded that craning in the suspension is possible but will require not just the vacuum tank lid but the ≈30 cm section of tank below it to be removed.
  * Hirata-san liaised with Nakamura-san of Mirapro. Mirapro will start assembling the frame in the first week of July. Saito-san has arranged for the second floor panels to be removed the week of 6/27.
  * Hirata-san cleaned more parts and measured another filter.
  * Fabian almost finished the IM assembly and started on the RM. Some of the IM panels had been improperly wrapped and will be re-cleaned. The MPC (multi-purpose cube) on the RM needed some rework (already done).
  * Mark did a top level schedule. The BS can probably be finished roughly when promised to Ando-san earlier, but the SRs will probably take rather longer because of all the prep work that still needs to be done. It may save time overall to delay the start of the BS installation a few weeks and concentrate on parts for SR. A second assembly frame would probably help.
  * Mark released a draft (about half-finished) of [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235|JGW-E1504235 - BS Installation Procedure]].
  * Mark updated [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3600|JGW-D1503600 - BS Suspension Cabling]] with a better arrangement for the IM and BF pico motor cables, as well as various other minor fixes.
  * Mark organized a review for Thursday 6/16.		   * Mark and Fabian worked at Kamioka:
   * All the parts for the security structure were located. The clamp pieces for the IM are being taken back to Mitaka to have extra screw holes added.
   * The BS/PR2/SR2 area was cleaned and tidied to allow floor removal and assembly frame construction.
   * 21 "Type 1" cables (PI-Flange, Signal) and 15 "Type 5" cables (OSEM) were tested. They all passed. Sufficient tested "Type 2" cables (PI-Flange, Motor) were located in the PR3 area.
  * Hirata-san worked on the Inventor assembly, adding views (originally defined by Mark) of the different phases of construction.
  * Hirata-san shipped 7 SFs and some parts to Kamioka.
  * Hirata-san made assembly drawings of the damper rings and cable clamps for SR.
  * Hirata-san liaised with Mirapro about the frame assembly.
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   * Fukushima-san is working on it (Takahashi-san witnessed it).
  * Not enough crane height problem (Hirata, Saito) - SOLVED		    * Fukushima-san will start on machining test soon (as of 5/27).
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   * Crane scale - ORDERED, due week of 6/20.    * Crane scale - RECEIVED
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 * Create a rough new LVDT model -> Saito-san found that they fit around the BF.
 * Assembly plan for Modified Type-Bp: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5287|JGWdoc]] -> asked Saito-san to do more upgrade.
  * Upgrade points: some screw sizes were wrong. Move the security poles inside so that we can fix them from the top.etc...
 * I found that we cannot load on the BF than I expected before.
  * The model of the BF was updated recently. When we decided the plan BF, the model was wrong, which means that the mass was wrong.
  * The load on the SF GAS = Tha mass on the BF GAS: 53.5 kg + IRM: 9.0 kg + BF: 100.2 kg = 162.7 kg
  * The optimal load on the SF GAS is 164.3 kg (minimum for the SFs whose caps cannot be closed).
  * The weight of the actuator base is currently 1.9 kg (w/o coils and magnets).
  * I suggest to gain weight margin by reducing the moving masses on the cap.
  * '''Mark will measure the Type-B BF in the next week '''		  * Designed the additional masses for the IM [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5301|JGWdoc]](Shoda)
 * Created the 3D model of the vacuum tank with the PR suspensions also for PR2, 3, and M. [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5309|Sectional View of PRs]](Shoda)
 * Checked if the suspension parts clip any beams. Found the POX and POY beams are clipped at the RM. (Shoda)
 * Ckecked also the OpLev beam path inside the chamber except for PR2. Found that we cannot have the OpLev beam spot at the center of the PR3 optic. [[https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/VIS/CAD/|SVN]](Shoda)
 * Summarized the information of iKAGRA PR3 measurement. [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5316|Report]](Fujii)
  * Now comparing the simulation and the measurement.

 * Design for the modification of the optical bench suspension points is on going. (Shoda)
  * We need the additional machining at the intermediate stage of the optical bench.
 * Design for the installation jigs for the optical bench is on going. (Shoda)
 * Detailed simulation for the modified Type-Bp is on going. (Fujii)
  * Created the Type-Bp model in both the SUMCON and simulink.
  * Checked the almost all the modes are damped within 1 min.
  * Design for the control filters are on going.

 * I asked Kasuya-san @ Somiya group to join the Type-Bp installation. And she agrees. How far she will be involved is under discussion.
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 * No report  * I'm working on experiment for stability of PhotoMos Relay.
  . (I will be reported at the next meeting(Maybe..).
 * Above 10Hz, the resistance fluctuation seems small (1e-7 Ohm/rtHz level)
 * In the 20min time scale, the resistance is fluctuating with the amplitude of 0.5mOhm or so.
 * '''We will get more detailed report in the next week'''
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 * BS flag/prism glueing problem (Mark)
  * Will take 1 week to make a new cup for the prism removal
  * Try to work on the re-glueing on the first week of July
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  * Raffaele had a discussion with Virgo people
  * Virgo people are interested in joining this research
  * Used devices from Virgo may be available -> '''Ask Virgo how many are available (Raffaele) '''
  * Size check: '''Is the size of the existing LVDTs in Virgo compatible with the space around the Type-Bp and Type-A BFs ?(Shoda, Sato)'''
  * How many devices do we need ?
   * It depends on if we need vertical ones or not
   * Virgo did not need vertical ones for the BFs with short bottom legs (KAGRA BFs have no legs)
   * '''Check the horizontal to pitch coupling with the simulation (Okutomi)'''
  * Electronics: We need to make circuits to combine the LVDT excitation signal and coil actuation signal. (continue discussion on how to make this)
  * '''Setup another meeting with Virgo soon (Raffaele)'''.
 * Dummy payloads for Type-A (Takahashi)
  * How difficult it is to make mirror mounted payloads: certainly it will take much more time to design compared with just a dummy weight
  * Aso will keep VIS people updated on the SEO discussion		   * Will have a meeting with Virgo on 6/27 from 4PM
   * '''Shoda will give an overall presentation '''
    * Show the fit check drawings
   * Discussion about the electronics. '''Ask Virgo people if they can give a short presentation on electronics (Raffaele)'''
  * Available size around the BFs (Shoda, Sato)
   * Type-Bp: 6 of them will fit if we rotate the vertical ones around the wire axis.
   * Type-A: We need to use the openings for the flanges in the cross-tube
  * Length to pitch coupling simulation (Okutomi)
 * Dummy payloads for Type-A (Takahashi, Aso)
  * Dummy payload interferometer: unlikely to happen
  * Need to think about how to test the Type-A performance without Michelson.
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 * Mon:Mark and Fabian for BS preparation. Takahashi for various works
 * Tue: Mark and Fabian for BS preparation. Takahashi for various works
 * Wed: Mark and Fabian for BS preparation. Takahashi for various works		  * Mon:Mark and Fabian for BS preparation, Fujii for accelerometer, Akutsu and Simon for BS length sensing OpLev
 * Tue: Mark and Fabian for BS preparation, Fujii for accelerometer, Akutsu and Simon for BS length sensing OpLev
 * Wed: Mark and Fabian for BS preparation, Fujii for accelerometer
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BS crane will not be available: 13th -14th of June
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 * 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:
  * Ohishi:
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  * Akutsu: 27-28
  * Simon: 27-28
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July 5 - 7: Takahashi, Ishizaki, Sato (site check for the installation of Type-A)  * Travel (Week of 7/4):
  * Takahashi: 4-7 (extended chief meeting, site check for the installation of Type-A)
  * Shoda: 4 (extended chief meeting)
  * Mark:4-6 (preparation for BS installation)
  * Fabian:
  * Okutomi:
  * Fujii:
  * Ishizaki:5-7 (site check for the installation of Type-A)
  * Hirata:4-6 (preparation for BS installation)
  * Sato: 5-7 (site check for the installation of Type-A)
  * Ohishi:
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2016/6/24(Fri) 13:30 - 2016/7/1(Fri) 13:30 -

Agenda/Minutes of the VIS Meeting on 2016/6/24

2016/6/24 13:30 - 15:00 @ Room 210

Participants:Fabian, Mark, Ohishi, Aso, Sato, Ishizaki, Tanaka, Hirata, Shoda, Raffaele, Akutsu

Progress report

Schedule Chart (PDF,MPP)

Type-A (Takahashi)

  • Minutes of Type-A Meeting

  • Simulation

    • Deadline is the end of June (Okutomi)

  • 5 blades for BF -> "The filters in Virgo are different from the GAS filters (no compression). 3 + 2 combination is no problem." (by E. Majorana)

Type-B (Mark)

  • Type B Past Week Summary
    • Mark and Fabian worked at Kamioka:
      • All the parts for the security structure were located. The clamp pieces for the IM are being taken back to Mitaka to have extra screw holes added.
      • The BS/PR2/SR2 area was cleaned and tidied to allow floor removal and assembly frame construction.
      • 21 "Type 1" cables (PI-Flange, Signal) and 15 "Type 5" cables (OSEM) were tested. They all passed. Sufficient tested "Type 2" cables (PI-Flange, Motor) were located in the PR3 area.
    • Hirata-san worked on the Inventor assembly, adding views (originally defined by Mark) of the different phases of construction.
    • Hirata-san shipped 7 SFs and some parts to Kamioka.
    • Hirata-san made assembly drawings of the damper rings and cable clamps for SR.
    • Hirata-san liaised with Mirapro about the frame assembly.
  • 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
      • Akutsu-san is working to get wide-mouth OSEMs

    • Longer cables for BF->PI and SF->PI.

      • Takahashi-san has ordered extra connectors (due any day) and will get a company to make the cables.
    • 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).
    • Installation stuff
      • Crane scale - RECEIVED
    • 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.
    • Documents

Type-Bp (Shoda)

  • Designed the additional masses for the IM JGWdoc(Shoda)

  • Created the 3D model of the vacuum tank with the PR suspensions also for PR2, 3, and M. Sectional View of PRs(Shoda)

  • Checked if the suspension parts clip any beams. Found the POX and POY beams are clipped at the RM. (Shoda)

  • Ckecked also the OpLev beam path inside the chamber except for PR2. Found that we cannot have the OpLev beam spot at the center of the PR3 optic. SVN(Shoda)

  • Summarized the information of iKAGRA PR3 measurement. Report(Fujii)

    • Now comparing the simulation and the measurement.
  • Design for the modification of the optical bench suspension points is on going. (Shoda)
    • We need the additional machining at the intermediate stage of the optical bench.
  • Design for the installation jigs for the optical bench is on going. (Shoda)
  • Detailed simulation for the modified Type-Bp is on going. (Fujii)
    • Created the Type-Bp model in both the SUMCON and simulink.
    • Checked the almost all the modes are damped within 1 min.
    • Design for the control filters are on going.
  • I asked Kasuya-san @ Somiya group to join the Type-Bp installation. And she agrees. How far she will be involved is under discussion.

IMMT (Ohishi)

  • No report

Watchdog system (Tanaka)

  • I'm working on experiment for stability of PhotoMos Relay.

    • (I will be reported at the next meeting(Maybe..).
  • Above 10Hz, the resistance fluctuation seems small (1e-7 Ohm/rtHz level)
  • In the 20min time scale, the resistance is fluctuating with the amplitude of 0.5mOhm or so.

  • We will get more detailed report in the next week

Safety

  • No issue

Issues

  • LVDT for BF damping (Shoda, Raffaele)
    • Will have a meeting with Virgo on 6/27 from 4PM

      • Shoda will give an overall presentation

        • Show the fit check drawings

      • Discussion about the electronics. Ask Virgo people if they can give a short presentation on electronics (Raffaele)

    • Available size around the BFs (Shoda, Sato)
      • Type-Bp: 6 of them will fit if we rotate the vertical ones around the wire axis.
      • Type-A: We need to use the openings for the flanges in the cross-tube
    • Length to pitch coupling simulation (Okutomi)
  • Dummy payloads for Type-A (Takahashi, Aso)
    • Dummy payload interferometer: unlikely to happen
    • Need to think about how to test the Type-A performance without Michelson.

Site work plan for the next week

  • Mon:Mark and Fabian for BS preparation, Fujii for accelerometer, Akutsu and Simon for BS length sensing OpLev

  • Tue: Mark and Fabian for BS preparation, Fujii for accelerometer, Akutsu and Simon for BS length sensing OpLev

  • Wed: Mark and Fabian for BS preparation, Fujii for accelerometer
  • Thu: Mark and Fabian for BS preparation.
  • Fri: Mark and Fabian for BS preparation.

Travel Plans

  • Travel (Week of 6/27)
    • Takahashi:
    • Shoda:

    • Mark:27 - 7/1

    • Fabian: 27 - 7/1
    • Okutomi:
    • Fujii: 27-29
    • Ishizaki:
    • Hirata:
    • Ohishi:
    • Sato:
    • Akutsu: 27-28
    • Simon: 27-28
  • Travel (Week of 7/4):
    • Takahashi: 4-7 (extended chief meeting, site check for the installation of Type-A)
    • Shoda: 4 (extended chief meeting)

    • Mark:4-6 (preparation for BS installation)

    • Fabian:
    • Okutomi:
    • Fujii:

    • Ishizaki:5-7 (site check for the installation of Type-A)

    • Hirata:4-6 (preparation for BS installation)

    • Sato: 5-7 (site check for the installation of Type-A)
    • Ohishi:

Mark is away: July 8-20

Next meeting

2016/7/1(Fri) 13:30 -

Next F2F 7/8

KAGRA/Subgroups/VIS/VISMinutes20160624 (last edited 2016-06-24 15:18:28 by YoichiAso)