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Size: 2925
Comment:
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Size: 3180
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 46: | Line 46: |
| * Safety margin in Virgo is as follows. They adopt 1.75 GPa as yield strength. * They don't take the stress concentration to account. Considering Type-A case, smallest margin would become 2.2 . |F1| 2.5| |F2| 2.9| |F3| 3.1| |F4| 3.3| |F7| 2.7| |
Agenda/Minutes of the VIS Meeting on 2016/9/30
2016/9/30 13:30 -
Participants:
Progress report
Type-A (Takahashi)
- Pre-isolator: Pre-isolators will be assembled in ATC. IP+TF will be transported from Akeno on 3rd October.
- EQ stop, release sensor, dummy payload: Production is on going. Met with the company person on 16th.
- Bottom Filter: Assembly of the second BF is on going.
- BF damper: Made the specification document with the drawings. Asking a quotation to a company. Actuator efficiency of LVDT prototype was measured.
- Maraging wire: New design around head was shown by ATC. Tensile test is in preparation.
Type B (Mark)
- Put a report here
Type-Bp (Shoda)
- Modification Parts
- Akutsu-san and others helped us complete the spec document.
- We got final quatation. After some updates on spec document and the assembly drawings, we will proceed to an order soon.
- Mirapro
- Hirata-san updated the wire design and hook design. Some other parts only used for Type-Bp should be also updated.
- How to order is under discussion.
- Mirror preparasion
- Discussion about the jigs for removing the current flags from the PR3 and spare mirrors are ongoing with Hirose-san.
- F7 LVDT
- The sensor coupling noise according to F7 LVDT is updated. Since the noise level is close enough to the requirement, which is set with the 10 times mergin, the sensitivity should be OK.
IMMT (Ohishi)
- Put a report here
Watchdog system (Tanaka)
- Put a report here
Safety
- Any issue ?
Discussion
- Inspection report of the GAS blade from Virgo (Takahashi)
- Safety margin in Virgo is as follows. They adopt 1.75 GPa as yield strength.
- They don't take the stress concentration to account. Considering Type-A case, smallest margin would become 2.2 .
|F1| 2.5| |F2| 2.9| |F3| 3.1| |F4| 3.3| |F7| 2.7|
- Maraging and SUS rod issue follow up.
- Which rods to be re-made ? (Takahashi)
- Type-A rod neck diameter
- IM OSEM noise issue (Shoda)
Site work plan for the next week
- Mon: BS test hanging
- Tue: BS test hanging
- Wed: BS test hanging
- Thu: BS test hanging
- Fri: BS test hanging
Travel Plans
- Travel (Week of 10/3):
- Takahashi: 3(Akeno)
- Shoda:
- Mark: 3-7
- Fabian: 3-7
- Okutomi:
- Fujii:
- Ishizaki:
- Hirata:
- Sato: 3(Akeno)
- Ohishi:
- Travel (Week of 10/10):
- Takahashi: 11 -14 (Extended Chief Meeting/Accelerator check)
- Shoda:
- Mark: 11-14
- Fabian: 11-14
- Okutomi: 11 -14 (Extended Chief Meeting/Accelerator check/FE code development)
- Fujii:
- Ishizaki:
- Hirata:
- Sato: 11 -14 (Extended Chief Meeting/Accelerator check)
- Ohishi:
Next meeting
2016/10/7(Fri) 13:30 -