Agenda/Minutes of the VIS Meeting on 2017/1/27

2017/1/27 13:30 -

Participants: Tanaka, Mark, Sato, Ishizaki, Fabian, Hirata, Okutomi, Shoda, Enzo, Someya, Hashimoto, Akutsu

Progress report

Schedule Chart : (PDF,MPP)

Minutes of Type-A Meeting
EYV chamber: Top chamber was connected again.
Pre-isolator: The pre-isolators for SR were packed and moved out of the large clean room on 23rd.
BF damper: Checked delivered parts on 24th.
Maraging wire: The wires are delivered on 31st. They are sent to the thermal proccess on 1st February. To be shipped to Kamioka on Feb. 7th.
- The 3.3m wire can be treated at Himeji facility of Kinzoku-giken.
Preparation of installation: The floor of clean booth was covered by stainless steel sheet. The foot holds were assembled.
- Other large tools (rack, wagon, desk, so on) also were installed into the clean booth.
Next Week Plan
BF damping pre-assembly
Open the top chamber.
Set the assembly base.
Sato-san will stay in Mitaka to send the delivered rods to the heat treatment. Also incorporate cables into the Type-A CAD model.

Hirata-san:
- Received many parts from i-ject for BFRM (took pictures and took them into ATC cleanroom).
- Got quotes for PRM/SRM payload from i-ject.
- Checked quotes and asked for some modifications.)
- Washed parts (parts for type-A, small hexagons, screws, etc\)
- Wiped 9 piano wires and sent to Kamioka for PR.
- Updated Fabian's EQstop parts for BS recoilmass and updated EQstop assy drawings.
Fabian
- Worked out geometry for blade adjustment.
- Designed additional ballast masses for BS BF (and SR).
Mark and Enzo (at Kamioka)
- Did two rounds of adjustment of the blades with help from Takahashi-san (one for position, one for frequency)
- Surveyed the position of the rod using the vertical mode of the bubble level.
- Got apparent improvement as judged at the IRM-IM EQ stops (but still not perfect).
- Did one more round of blade adjustments (without Takahashi-san)
- Got good agreement with IRM-IM EQ stops, so put BF cap on and raised the whole system to check for balance.
- Found balance still fairly bad: about the same on the -X,+Y diagonal and about half on the +X,+Y diagonal (70 and 30 mm worth of motion of a single trim mass respectively; previous a bit over 70 mm each). Moreover, IRM-IM alignment no longer good.
- From the imbalance torques, calculated the offset of rod as 2.3 mm in the direction 22 degrees to the +X side of -Y.
- Calculated the blade adjustments required: {-0.325194, -1.79175, 2.11695} mm
- Prepared to apply adjustments (removed cap etc).

Hanging Report: TF measured, BF has been set.
- EQ stop parts below the BF were assembled.
- We measured TFs of RM using PSs. (Their alignment was not so easy.)
- BF was placed on the EQ stop. (Traverser was moved out of the clean room for accesibility.)
- BF and IM was connected. Not hanged yet.
- BFRM parts were delivered.
  - Test assemble them in Mitaka on Feb. 2nd.
Next week task: Hang IRM
- Hang IM and adjust the weight.
- Hang IRM and balance IM.
- IRM and set OSEMs.
A mirror box was sent to a company for modification
Flag bases were sent to a company for modification
Winch were sent to Mitaka for inspection
To do
- Establish disassemble procedure
- Buy the new tools

Last week we put IMMT mirrors in suspension.
This week, we have adjusted the mirror position and angle to be the same as old ones.
Beam profile measurement, which aims at adjusting the mirror position, was postponed to next week.

WDS PCB Design Document.Main rack( Main board + peripheral board )design.
- Correction of PCB design and correction by DRC(by manufacturer).PDF(JGW-E1706101)

Incidents: cut finger with a stainless steel sheet
- We need to wear globes for this kind of work

Type-A: Type-B: Crane work to lift the BF up. Type-Bp: No heavy lifting. Mirror does not move.

Foreseen risks
- Type-A: Open the top chamber (a crane work).
- Type-B: Crane work to lift the BF up.
- Type-Bp: No heavy lifting. Mirror does not move.

Smaller coil design status update (Aso)
- We will use the same PEEK (Ketron CA30). This material was chosen to avoid charging.

Mon: BF blade adjustment (B)/Hang IM(Bp)
Tue: BF damper pre-assembly (A)/BF blade adjustment (B)/Assemble IMRM (Bp)
Wed: BF damper pre-assembly (A)/BF blade adjustment (B)/Assemble IMRM (Bp), Delivery of the parts for optical bench (Bp)
Thu: Open the chamber (A)/BF blade adjustment (B)
Fri: Set up assembly frame (A)/BF blade adjustment (B)

On 2017/2/3(Fri) VIS F2F: Feb. 17th March VIS F2F: March 10 ?

KAGRA/Subgroups/VIS/VISMinutes20170127 (last edited 2017-01-27 20:06:09 by NaokoOhishi)