Agenda/Minutes of the VIS Meeting on 2020/2/7
2020/2/7 14:00 - 14:30
Participants: Takahashi, Hirata, Sato, Ishizaki, Aso, Okutomi, Tanaka, Lucia
Progress report
Type-A
Past week report
Plan for coming weeks
Type B
Past week report
- OPLEV box:
- I have verbally requested information about the box for the TM oplev to the CRY group but there's no response yet.
- I got more information from Akutsu-san about the box Mirapro designed for the MN oplev.
- I'm making a a more suitable design using Mirapro's ideas and implementing the features requested in the previous meeting.
- About SRM BF condition:
- The keystone has a free range of ±130 um, presumably due to a screw that fell from upper stages which landed in the wrong place within the filer enclosure.
- The current plan is to insert a small fibre optic camera (Ø3.9 mm) through one of the Ø5.2 mm holes at the base of the BF filter base.
- Yokozawa-san turned off some turbo pumps in the central room, which produced the temperature to decrease.
- The temperaure change in turn produced a drift in the DC control signals of GAS filters; in the worse case for Type B the signal reached around -18,000 counts in the BF top filter.
- Later Yokozawa-san turned off the cooler near the BS clean booth and the temperature recovered to 23.7 degrees (23.8 degrees requested for O3).
Plan for coming weeks
- I aim to finish the design of the SR top oplev box.
Type-Bp
Past week report
- IP address of the picomotor in PR3 was wrong.
Plan for coming weeks
OMMT & OSTM
Past week report
Plan for coming weeks
VIS electronics
Past week report
- Started investigation of LVDT-ACT coupling in the combiner circuit.
- The combiner and the DC cable are necessary.
Plan for coming weeks
Other site works
Safety
Discussion
Travel Plans
- Travel (Week of 2/10):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 2/17):
- Takahashi:
- Sato: 19-21(shift)
- Hirata: 20-22(shift)
- Shoda: 18-20(shift)
- Fujii:
- Tanaka:
Next meeting
On 2020/2/14(Fri)