• KAGRA
• Subgroups
• VIS
• VISMinutes20170623

Agenda/Minutes of the VIS Meeting on 2017/6/23

2017/6/23 13:30 - 15:00

Participants: Mark, Okutomi, Sato, Ohishi, Aso, Ishizaki, Fabian, Enzo, Shoda, Raffaele, Akutsu, Tanaka, Takahashi

Progress report

Schedule Chart : (PDF,MPP)

• Type-A: A week delay in Y-End. On schedule for X-End but the X-End schedule need to be shortened.
• Type-B: Updating the real BS installation schedule.
• Type-Bp: 2 weeks delay by the gluing problem, but progressed other works scheduled later.

Type-A (Takahashi)

Past week report

Installation in Y-end/X-end:

20th(Tue)

• Recovered from the power outage.
• Opend the chamber.
• Tuned the TF by changing the compression of blades again.
• Disassembled the bridge frame.

21th(Wed)

• Continued the tuning of TF to 0.2Hz.
• Released the IP and adjusted the tilt of the IP base.
• Checked the FR for TF. The FR was not working.
• Made the cables for ACC.
• Transported some items from the Y-end to the X-end.

22th(Thu)

Y-end

• Tuned the IP roughly. The frequency is 80mHz.
• Adujusted the centering of IP by the tilt of IP base and the motor sliders.
• Started cabling from the TF to the feedthroughs.

X-end

• Cleaned the floor.
• Covered the floor by SUS sheets.

Plan for coming weeks

• Setting of the BF damper.
• Cabling to the feedthroughs.
• Setting of the ACCs.
• Preparatioin in X-end.

Type B (Mark)

Past week report

At Kamioka (Mark, Fabian, Enzo, Hirata-san):

• We disconnected the in-vacuum and in-air cabling from the feedthroughs.
• We removed crossbars below BF and SF.
• We set the SF damper to 4 mm clearance.
• We adjusted the jacks to nominal height.
• We removed the geophones and PI yaw stepper for craning.
• We craned the suspension into the tank, and hooked the LBB Cu ring.
• We replaced the geophones etc.
• We unlocked all but the IP and adjusted the jacks until the pendulum was centered in the security structure.
• We unlocked the IP and adjusted to to center with the jacks and fishing rods.
• We craned the vacuum tank lid+ring back on, and then removed just the lid (only).
• We unclamped the LBB damper rings and removed the spacers.
• We removed the blocks and shims supporting the LBB, inserted the long screw feet and hooked the LBB to the Cu damper ring.
• We added 2*31.5 kg of ballast to the LBB, which got the blades to the point where firm pressure would depress the tips.
• We reconnected the in-vacuum cabling. In ≈15 places we opted to omit the Type 1 cable and use a F-F gender bender.
• We reconnected all but four of the in-air cables.

Plan for week of 6/26

Mark and Enzo at Kamioka:

• Double-check where gender-benders were used.
• Finish connecting in-air cabling.
• Debug all cabling.
• Work with Simon to set up LSOL.

Fabian at Mitaka:

• Design final ballast masses for IM, BF and SF assuming no BF rebuild (needs to be adaptable).
• Check all items for BS flag/prism gluing are available (prisms, flags, jigs, mirror box, glue, scale, mixing tools etc).

Hirata-san at Mitaka:

• Do new 3D CAD:
  • BS Test Hang build, with top of tank, full suspension, and LBB damper all reversed.
  • Final BS build, as above, but with everything BF down rotated back to original.
    • In-tank version.
    • On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
  • SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Mark to do.)

Type-Bp (Shoda)

Past week report

• The wire breaker still refused to be attached.
  • We tried two more times (on Tuesday and Wednesday). The 2nd wire breaker was attached. But the 1st wire breaker still have not been glued.
  • We tried gluing again today at IYC clean booth.
• The temperature change by 3 degrees during the power outage, which corresponds to about 2 mm height change per 1 GAS filter. And the temperature seems to change more if the power is not turned on for longer time.
• PRM optical bench intermediate ring and damper ring are prepared and set inside the PRM chamber.
• PRM cabling is almost ready at outside the clean booth.
• BIO system is implemented into the PR3 model, but we need help of Kokeyama-san or Miyakawa-san in order to increase the BIO card more than 10.

Plan for coming weeks

• Please glued. Then mirror hanging.

IMMT (Ohishi)

Past week report

• Drawing some parts related with IMMT; coil holder support, etc.

Plan for coming weeks

• 6/27(Tue)-28(Wed) Magnets and standoffs gluing at Kashiwa

Watchdog system (Tanaka)

Past week report

• Examination of experimental preamplifier circuit fabrication. -->

  • I completed the performance test of the PreAmp. for use on the KAGRA side.However,data analysis is in progress.Report(JGW-E1706850)PDF

• Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->

  • Estimate --> completed.

  • Waiting for purchase of goods.

Plan for coming weeks

• Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->Ongoing.

• Examination of experimental preamplifier circuit fabrication. -->Ongoing.

• Adjustment of experiment schedule etc. in the KAGRA side start.

Other site works

• 6/26-30: PR area: stainless steel flooring
• 6/28: Maintenance of the rapid charger for the electric vehicles

Safety

• Incidents: no
• Foreseen risks
  • Type-A: Crane work to close the chamber
  • Type-B: Close the lid back on
  • Type-Bp: Mirror hanging

Discussion

Type-A

• The immovable FR on the TF will be fixed after the CRY test hanging is finished.
• X-End schedule is too tight. We need to find ways to expedite the schedule. Takahashi and Aso will discuss it in the next week.

Type-B

• We want to do the gluing work of the real BS in the week of July 3rd.
• We need a Pelican box for the transportation of BS.
  • Will check the size of the existing Pelican box to see if the BS mirror box fits in.
• Mark will talk to Hirose-san about the gluing schedule and the Pelican box issue.

Type-Bp

• The schedule is delayed by the gluing problem.
  • Aso will check the impact of this to the commissioning schedule

Cable purchase

• Type-B wants to use much shorter cables to connect from the suspension to the flange.
  • Will talk to Sato-san after the meeting.

Travel Plans

• Travel (Week of 6/26):
  • Takahashi: 26 - 29
  • Shoda: 26 - 29
  • Mark: 26 - 29
  • Fabian:
  • Okutomi: 26 - 29
  • Fujii:
  • Ishizaki: 26 - 29
  • Hirata:
  • Sato: 26 - 29
  • Enzo: 27 - 29
  • Simon: 26 - ??
  • Ohishi: 27 - 28 (Kashiwa)
  • Tanaka:
  • Akiyama(Hosei): 27 - 29
  • Hashimoto(Hosei): 26 - 29
• Travel (Week of 7/3):
  • Takahashi: 3 - 7
  • Shoda: 3 - 7
  • Mark: TBD
  • Fabian: TBD
  • Okutomi: 3 - 7
  • Fujii:
  • Ishizaki: 3 - 7
  • Hirata: TBD
  • Sato: 3 - 7
  • Enzo: TBD
  • Ohishi:
  • Tanaka:
  • Komori (Ando lab.): 3 - 7
  • Hashimoto(Hosei): 3 - 6

Next meeting

On 2017/6/30(Fri) Next F2F: 7/??