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Size: 4841
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Size: 4856
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| Participants: Mark, Shoda, Ishizaki, Sato, Okutomi, Aso, Takahashi, Ohishi, Hirata, Fabian, Enzo | Participants: Mark, Shoda, Ishizaki, Sato, Okutomi, Aso, Takahashi, Ohishi, Hirata, Fabian, Enzo, Fujii, Tanaka |
Agenda/Minutes of the VIS Meeting on 2017/2/10
2017/2/10 13:30 -
Participants: Mark, Shoda, Ishizaki, Sato, Okutomi, Aso, Takahashi, Ohishi, Hirata, Fabian, Enzo, Fujii, Tanaka
Progress report
Type-A (Takahashi)
Past week report
- Installation in Y-end
- 7(Tue): Assembled the dummy payload and the EQ stop for it. Pre-assembled BF damper. Assembled the EQ stop for BF.
- 8(Wed): Assembled the BF. Measured the weight of BF (105.7kg).
- 9(Thu): Installed the dummy payload and the BF with athe EQ stop into the top chamber.
- Maraging wire: The wires after aging were delivered on 7th. The 3.3m wire will be treated at Himeji facility of Kinzoku-giken.
Plan for coming weeks
- Install the protection net ring.
- Tune the weight of dummy payload.
- Assemble the BF damper with the support ring.
- Lift down the dummy payload.
- Set the EQ stop for F3.
Type B (Mark)
Past week report
- Hirata-san:
- Did drawings of SR damper.
- Mark, Fabian, Enzo and Hirata-san (at Kamioka):
- Took the end plate off the IM to get access to the pitch/roll picos.
- Found the pitch pico was unreliable and replaced it.
- Found the springs were not stiff enough, and immobilized 7 turns at the end of each with Cu wire to make them stiffer.
- Reassembled and rebalanced the IM.
- Reassembled and adjusted the IRM.
- Discovered that the transverse offset between IRM and IM could be corrected by adjusting the roll of the BF.
- Adjusted IM OSEMs to half-way.
- Made and installed a new pair of wires for the BF yaw pico on the IM pico adapter (Hirata-san).
- Installed an improved LVDT cable made by Hirata-san.
- Made and hung posters for the Elites meeting visitors.==== Plan for coming weeks ====
Plan for coming weeks
- Enzo to stay in Mitaka and concentrate on getting drivers' license
- Mark and Fabian to come to Kamioka and finish adjusting OSEMs and take TFs.
- Assorted procedure writing and design tasks (SR frame etc)
Type-Bp (Shoda)
Past week report
- Main suspension
- Active damping for IM are implemented.
- BF FR was tested with the new driver chassis.
- BF GAS LVDT was calibrated by inserting 1 mm sims.
- New BF LVDTs are assembled.
- BF cap, BFRM, and the EQ stop parts bewlo the SF are assembled.
- The BFRM is now sitting on the spacer attached on the BF.
- Note: the company delivered other coated screws for the screws which we assigned as SDC with a vent hole. Be careful.
- Optical bench suspension
- Optical bench installation jigs, wire adapters for the optical bench, and optical bench suspension rods are assembled.
- The OB installation jigs was tested a little.
- Others
- The temporally clean booth was cleaned and the floor sheet will be changed.
The EQ stop bars below the IM did not seem to be dirty now. -> Only old aluminum parts should be re-made.
BFRM suspension rods are delivered -> 2nd assembly test at Mitaka?
Plan for coming weeks
- Optical bench suspension test.
- Assemble magnets on the OB Damper
- Suspend the OB damper, OB intermediate mass, and OB for the test.
IMMT (Ohishi)
Past week report
Looking for jig parts http://klog.icrr.u-tokyo.ac.jp/osl/?r=2439
Plan for coming weeks
Watchdog system (Tanaka)
Past week report
Plan for coming weeks
Safety
- Incidents:
- Foreseen risks
- Type-A:
- Type-B:
- Type-Bp:
Discussion
Disassembly procedure proposal (Shoda) document
Site work plan for the next week
- Mon: Type-A, B, Bp
- Tue: Type-A, B, Bp
- Wed: Type-A, B, Bp
- Thu: Type-A, B, Bp
- Fri: Type-A, B, Bp
Travel Plans
- Travel (Week of 2/13):
- Takahashi: 13-16
- Shoda: 13-16
- Mark: 13-16
- Fabian: 13-16
- Okutomi: 13-16
- Fujii:
- Ishizaki: 13-16
- Hirata:
- Sato: 13-16
- Enzo:
- Hashimoto (Hosei Univ.): 13-16
- Someya (Hosei Univ.): 13-16
- Ohishi:
- Travel (Week of 2/13):
- Takahashi:
- Shoda:
- Mark:
- Fabian:
- Okutomi:
- Fujii:
- Ishizaki:
- Hirata:
- Sato:
- Enzo:
- Hashimoto (Hosei Univ.):
- Someya (Hosei Univ.):
- Ohishi:
- Tanaka:
Next meeting
On 2017/2/17(Fri) in Mitaka
March VIS F2F: March 3