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• VISMinutes20151204

VIS Meeting on 2015/12/4

2015/12/4 13:30 - 17:30

Room 210 + SeeVogh

Participants: Takahashi, Akutsu, Raffaele, Ishizaki, Tanaka, Mark, Shoda, Okutomi, Fujii, Fabian, Joris, Agatsuma, Hirata, Ohishi, Aso

Schedule

• Schedule status (Aso)

  • Latest schedule chart

PR

• Test Hanging Status (Takahashi)
  • LVDT driver
    • Akutsu-kun checked one LVDT driver in the office. It seems to work fine.

    • Will bring this one into the tunnel for the hanging test

  • Picomotor connection
    • Both In-vac and out-vac cables are ready

    • Will test the connection on Monday

  • Fishing rod motor
    • In-vac cable assembly failed at the site. No spare D-SUB9 at the site.

    • Will use a non-vacuum compatible D-SUB for the hanging test.

    • Oredered a tool for removing failed pins from D-SUB
  • Digital system is not working most of the time
    • We should prepare analog alternative for signal checking
• PR2 preparation (Mark, Fabian)
  • Cleaned up the area
  • Set up a temporary clean booth
  • Put the steel sheets under the assembly frame
  • Hanging frame is now set inside the assembly frame
  • Hanging frame is mostly completed
• Location of the EQ stop pillars
  • There are 4 holes to hold the EQ stop pillars around the TM, but we use only 3 of them to avoid interference with the main beams.

  • Takahashi will give Hirata the desired positions of the pillars

  • Hirata will update the 3D model accordingly and give it to Akutsu

  • Akutsu will check for the compatibility with the OpLev

• A cable clamp to be attached to the suspension rod has a wrong size collet.
  • It is already at the site. To be washed.
• Payload weight issue
  • BF load check at the ATC

    • BF#1 Previous measurement 53.1kg without fishing rod. -> 52.9kg w/o fishing rod, 53.3kg with fishing rod

    • The theory that we mistook BF#1 for #2 was wrong.

    • Check the optimal load for the ETM BFs at the ATC: Need to be done before the end of Jan. Arrange with ATC people (Takahashi)

    • Need to prepare additional balast masses with better design

      • Fabian will design ones on Monday (12/7)

      • Takahashi and Hirata will make 2D drawings (adding surface treatment information and so on) and order to a company

• Traverser actuation check (Shoda)
• Traverser stop mechanism (Shoda)
  • Uraguchi-san's plan seems fine

  • Procurement status (Takahashi): Told Uraguchi-san about our decision. Will order the parts soon.

• Clean work procedure

  • Particle count record (Shoda): Got the calibration factor from Hasegawa-kun. 10^{4 cnts/m}3 for below 0.3um. -> ISO class 5.

  • Where to put the floor coach filters for PR2 and PR3 work -> Consult with Hirose-san

  • Okutomi had a discussion with the cleaning company.

http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4659

• KAGRA should have a special meeting for clean requirements (Aso will propose to Saito-san)

• PR CAD model and assembly drawings (Hirata)

  • Need to give the rotation angle of the traverser top plate (Aso)

• Cable status (Takahashi)
  • 12/1: 4th delivery. One more is remaining.

  • Made a cable list -> Put a link to the excel file on Wiki. Takahashi will improve the table.

• Call for shift for cable checking (Takahashi)
  • Liu-kun will come from 12/7
• Call for shift for assembly help (Takahashi)
  • Made a call for shift for helping the installation works
• PR2 gluing schedule (Tatsumi)
  • Had a discussion with Hirose-san (Aso)
    • Hirose-san will apply FC on PR2 on 12/4
    • He would like to check the removal of FC on 12/9 from the test hanging suspension. If there is any problem with it, he will redo the FC application on PR2 and PR3 before transportation.
  • Schedule
    • 12/4: FC application (Hirose)
    • 12/7: Flag gluing (Tatsumi)
    • 12/10: Packing and transportation (Tatsumi, Manuel, Ishizaki)
  • What to transport
    • PR2, PR3, original containers of the spare mirror and PR3
• Wire cleaning
  • We need to clean the suspension wires before the real suspension hanging.
  • Buy new wires and do acetone wipe at Mitaka

  • Hirata will do the actual wiping (Thu or Fri)

  • Mark will send the LIGO procedure to kagra-seis by Mon.

  • Fabian will compile the number of wires necessary by Mon.

  • Takahashi will buy the wires (by Tue)

• Cleaning of the existing winches
  • They get dirty by contacting the oilly wires
  • The wires to be installed into the vacuum will not contact the drum part
  • Wiping the drum will be sufficient
• Production of additional PR winches (Akutsu)
  • Most of the parts were delivered.
  • ATC engineers is test assembling the winches (mostly complete)
• RM compensation mass
  • Design status (Fabian): Do it later.

  • Order status (Takahashi): Placed an order. Will check the delivery date (Takahashi)

  • Need to buy screws for fixing the compensation masses. Takahashi will check the lengths of screws

  • For the RM assembly in the test hanging, SUS screws were fine (no gulling). So we will use SUS screws.
• RM EQ stop screw position (Takahashi)

  • Out sourcing: Need to send the plates to the company -> Sent 6 sets on Tue. One set remaining at the site.

• PR Optical Bench (Akutsu)

  • For PR3 OpLev, we don't need to have an in-vac reflector. So we don't have to raise the optical bench.

  • For PR2, we do need to raise the optical bench.
    • Delivery date for the screws: Dec. 21
    • PR2 vacuum installation will be Jan. 19
• OSEM assembly status (Akutsu)
  • 22 OSEMs were assembled
  • 10 OSEMs per suspension, so should be enough for PR2 and PR3
  • One risk is that they use old flexible circuits.
• Rails for the hanging frame (Hirata)
  • The ball exchange of the rails were finished. Already installed into the PR2 hanging frame.
• Test hanging vacuum installation
  • Do we have everything necessary

    • Takahashi willl make a procedure by Mon

  • Cleaness check by Hirose
    • Hirose will come on Wed.
  • What needs to be done when the suspension is inside the chamber ?
    • Transfer function measurement
    • Spectrum

    • Do we need OpLev -> Yes

    • Check the orientation of the mirror
      • Using the laser marker

      • Use OpLev for pitch ?

      • Mark will test the laser lever at Kamioka
      • Can we use the arm ducts as tilt reference ? (Ask Saito-san)
    • Check the height with laser marker
    • Peel off the first contact first
    • Practice of the suspension cleaning using the air gun
    • Inner frame modal analysis with the suspension (Takahashi)
• Next week (from 12/7) plan
  • Test hanging
    • Mon: Preparation of installation into the chamber, LVDT test, Fishing rod test, Picomotor test, cable check instruction
    • Tue: Continue the preparation work. Final check of the payload (balance of IM and so on)
    • Wed: Install the suspension into the chamber
    • Thu: Peel off the first contact. Hammering test. Cleaning practice.
    • Fri: Release the EQ stops. Check the free hanging. Check the orientation.
  • PR2
    • Mon: Assemble hanging frame
    • Tue: Find screws and other parts
    • Wed: Find screws and other parts
    • Thu: Put IM on the frame
    • Fri: Receive PR2 mirror. Move the winches from PR3 to PR2
• Travel (Week of 12/7)
  • Takahashi: Mon-Fri
  • Shoda: Mon-Fri
  • Mark: Mon-Fri
  • Fabian: Tue(PM) - Fri
  • Okutomi: Mon-Fri
  • Fujii: Mon-Fri
  • Ishizaki: Thu-Fri
  • Hirata:
  • Ohishi:
• Travel (Week of 12/14)
  • Takahashi: Mon-Thu
  • Shoda: Mon-Fri
  • Mark: Tue-Thu(AM)
  • Fabian: Mon-Fri
  • Okutomi: Tue-Fri
  • Fujii:
  • Ishizaki: Tue-Fri
  • Hirata:
  • Ohishi:
• Agatsuma: 12/7 - 12/10
• Joris: 12/7 - 12/18

BS

• What to do with BS after iKAGRA (Aso)
  • We need to decide on the plan by the end of Dec.
• BS Assembly Frame Design (Aso, Hirata)
• BS flag design (Mark, Fabian)
• BS gluing jigs (Tatsumi)
• Not enough crane height problem (Hirata, Saito)
• IP base clamp (Fabian)
• Bread board spring (Takahashi)
• BS clean bag (Aso)

ETM

• ETM installation procedure (Aso)
  • Sent the final version drawings to Mirapro
  • Waiting for quotation

Other

• Watch dog system (Tanaka)

  • Need to confirm the maximum output voltage from the coil drivers. Is it less than 14V ?(Aso)

  • How many channels are necessary ? -> roughly 100ch

  • RMS threshold level to be used for the development -> 150mA RMS over 2sec

  • Damping resistance -> 0 Ohm.

• GAS blade inspection by Virgo (Takahashi)
  • Waiting for shipping information:
• Request to the ATC for the next year

  • Production of the blades of the Type-A BF: We should check the consistency of the optimal load at the TAMA prototype experiment and G&M measurements (SF and TF) (Takahashi) -> Status

• Safety at the site (Takahashi, Ishizaki)
  • There was a near miss. Please read the report by Ohishi and Ishizaki

Next meeting

2015/12/11 (Fri) 13:30 -