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

    • BS Assembly Procedure E1504235, E1504235 draft

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