Agenda/Minutes of the VIS Meeting on 2016/9/16
2016/9/16 13:30 - @ Room 210
Participants: Mark, Fabian, Hirata, Takahashi, Sato, Ishizaki, Tanaka, Okutomi, Raffaele
Progress report
Type-A (Takahashi)
- EQ stop, release sensor, dummy payload: Open bidding was on 13th. Meet with the company person on 16th.
Bottom Filter: Assembly of BFs was started on 7th. Some of bearings washed previously were rusted. -> ordered new parts.-> Will buy more to prepare for replacing bearings in the existing BFs. (Takahashi).
- BF damper: Specification document will be prepared with the drawings soon. Test of LVDT prototype is on going.
- Maraging wire: Asking new design around head to ATC. Tensile test is in preparation.
- Foot hold: Considering the type used in ATC, which is ready made and folded.
Type B Past Week Summary
- Type B Past Week Summary
- Fabian, Mark, Yokogawa-kun and Kuwahara-kun did BS installation at Kamioka:
- Hung RM.
- Did permanent routing of RM OSEM cables to IM.
- Did temporary routing of RM OSEM in-vacuum cables to flange (4 channels).
- Did semi-permanent routing of all OSEM external cables to satellite amps (10 channels)
- Did temporary routing of RM OSEMs to PR2 rack (4 channels).
- Took data with geophones connected but immobilized and then stored geophones in boxes.
- Tested signals from first satellite amp getting to digital system.
- Weighed mirror box.
- Did fit check of flag holders for stub flags. Very minor adjustments will be needed.
- Covered everything in preparation for modifications to clean booth roof (9/20-21).
- Hirata-san:
- Finished 3D CAD of SR2 and SR3 in tanks, with optical layout included.
- Started 3D CAD for SRM.
- Checked flag design.
- Assembled a bottom filter (ongoing).
- Cleaned maraging rods.
- Fabian, Mark, Yokogawa-kun and Kuwahara-kun did BS installation at Kamioka:
- Type B ongoing issues
- Longer term to-do list
- Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing.
- Part "disk security" top has to be modified - screw positions do not match.
- Write more of payload assembly procedure (Fabian) - ONGOING
Write more of BS Assembly Procedure E1504235, E1504235 draft (Mark) - ONGOING
- Lower breadboard installation to be incorporated into the procedure document.
- Work on BS simulation (Fabian)
- Do BS Simulink model (Mark, Kokeyama)
- Do 2D drawings of SR2 parts (Hirata)
- Redesign SRx IM wire clamps for larger prisms, remachined RMs
- Order SRM/PRM parts (Hirata/Shoda)
- Order SRx fasteners (Hirata)
- Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing.
Type-Bp (Shoda)
- Modification Parts
- Structure Analysis is checked. The purchacing parts can be proceeded, while the method of a part of the analysis is not proper.
- Wire dimensions for the BFRM is fixed as same as BF/IM maraging rod.
- Waiting for the quatation with the proper format together with other additional orders.
- Mirapro
- Mirapro sent us a report about the optical bench wires. The top wires should be re-designed. Wires for PRs and BS will be ordered together.
- Preparing for the order.
- Mirror preparasion
- 1st wire breakers for PRs is not found even in Kashiwa. They should be ordered together with new flags.
- Made the rough jigs for removing the current flags from the PR3 and spare mirrors togher with Hirose-san.
- flag detaching will be done in November.
- F7 LVDT
- Magnetic coupling noise induced by the magnets on F7 LVDT is calculated with the same way of Shimoda-kun's calculation. (Only in length direction.)
- Current design is well enough for PRs.
- Magnetic coupling noise induced by the magnets on F7 LVDT is calculated with the same way of Shimoda-kun's calculation. (Only in length direction.)
IMMT (Ohishi)
- Put a report here
Watchdog system (Tanaka)
Conference material.Measures for the inrush current and final design for Power supply part(Regulation type).PDF
Safety
- No issue
Discussion
- Maraging and SUS rod issue follow up.
Safety margin: No information from Virgo. Will ask them again (Takahashi).
SUS rod FEA report.
- We will redesign the top rods for the optical bench suspensions.
- For PR, Shoda will ask Mirapro to re-design. For BS and SR, Takahashi and Hirata will do the re-design.
- PR+BS will be ordered with the PR assembly frame. SR rods will be ordered with the SR assembly.
Check with Ojima if more than 8mm nail head is possible or not: not yet asked. Will ask today (Takahashi)
- Temperature sensors on the suspensions ?
- Temperature sensor on the Type-A BF may be necessary to monitor the temperature gradient from the cryogenic part.
We need to know what precision is necessary -> consult with CRY (Takahashi)
For Type-B and Bp, we may want to put a sensor on the top plate. It is possible to add those sensors after the installation. Considering the current work load, we will postpone the preparation until the next year.
- Temperature sensor on the Type-A BF may be necessary to monitor the temperature gradient from the cryogenic part.
Site work plan for the next week
- Mon:
- Tue: BS clean booth cross-bar cutting (Aso)
- Wed: BS clean booth cross-bar cutting (Aso)
- Thu:
- Fri:
Travel Plans
- Travel (Week of 9/19):
- Takahashi:
- Shoda:
- Mark:
- Fabian:
- Okutomi:
- Fujii:
- Ishizaki:
- Hirata:
- Sato:
- Ohishi:
- Travel (Week of 9/26):
- Takahashi: 28 -30 (Accelerator check)
- Shoda:
- Mark: 26- 30
- Fabian: 26- 30
- Okutomi: 28 -30 (Accelerator check)
- Fujii:
- Ishizaki:
- Hirata:
- Sato: 28 -30 (Accelerator check)
- Ohishi:
Next meeting
2016/9/30(Fri) 13:30 -