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Size: 2573
Comment:
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Size: 2858
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 43: | Line 43: |
| * Monitored and offloaded the displacement of the IXV during the pump down. * Investigating the glitch of F3 signals in IX. |
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| Line 48: | Line 51: |
| * Is there any reason why some of them are inverted?? | * Is there any reason why some of them are inverted? The coil output gains are now kind of messy. |
| Line 53: | Line 56: |
| * What is the oscillation/pump at 20 mHz? It appears in many DoFs, e.g. IP L, BF L. (except GAS DoFs). . |
Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date: 2021/12/24 13:00-
Participants:
Schedule
- IX: Pump down on 12/23. Glich in the F3 signals.
- EX: In vacuum.
- IY:
- EY: Recovery of the BF problem.
Status
- Replacement of flip cables:
- TM height setting: ITMY.
- Oplev: Setup of the TM Oplev in IY after the TM alignment.
- ACC: Experiments in IX/EX. Assembly for EY.
- Commissioning in air: Return of GRY.
- Commissioning in vacuum: Pump down of IXC/IXV on 12/23.
- Overall commissioning:
- Acceptance check:
- PF actuator: At the in-vacuum commissioning.
- New vacuum pumps for V-chambers:
- Heater control:
- Power source for Oplev:
Discussion
VIS Meeting
Date: 2021/12/24 14:00-
Participants:
Summary Report
Type-A
- Monitored and offloaded the displacement of the IXV during the pump down.
- Investigating the glitch of F3 signals in IX.
ETMY
- Coil direction check for IP, GAS, and BF.
IP H1 H2 and H3 coils are all inverted. https://klog.icrr.u-tokyo.ac.jp/osl/?r=19295
F2, F3, BF GAS coils are inverted. https://klog.icrr.u-tokyo.ac.jp/osl/?r=19303
BF V1, V3, H2 coils are inverted. https://klog.icrr.u-tokyo.ac.jp/osl/?r=19309
- Is there any reason why some of them are inverted? The coil output gains are now kind of messy.
IP LVDT sensing and actuation diagonalization. https://klog.icrr.u-tokyo.ac.jp/osl/?r=19301, https://klog.icrr.u-tokyo.ac.jp/osl/?r=19302
- Some questions
- BF LVDT readouts are very large, they read a few thousand um/urad. Are they calibrated?
- Some GAS filters are some thousand microns away from the setpoint. Can I simply use the stepper motors to offload them? Is there anything I should pay attention to?
What is the oscillation/pump at 20 mHz? It appears in many DoFs, e.g. IP L, BF L. (except GAS DoFs).
.
Type-B
Type-Bp
Type-C
Electronics
Control
Schedule
See Schedule
- Type-A team: ACC in EY, Heter test in IXV/EXV
- Type-B team:
Safety
Discussion
Travel Plans
(Date in Kamioka)
The week from 12/27
(Holidays in 12/29-1/3)
The week from 1/4
- Takahashi: 1/5-7
- Sato: 1/5-7
- Hirata: 1/5-7
Next meeting
- 2022/1/7(FRI)