Agenda/Minutes of the VIS Meeting on 2018/3/2
2018/3/2 13:30 - 15:40
Participants: Fabian, Takahashi, Aso, Tanaka, Enzo, Okutomi, Hirata, Mark, Shoda, Ishizaki
Progress report
Schedule Chart
Type-A : (PDF/MPP)
Type-B: (PDF/MPP)
Type-A (Takahashi)
Past week report
[X-front]
- Finished the cabling between the BF and F3.
- Tuned the F3 again with hanging the F3 by crane.
- Final optimal load was additionally 1.2kg at 0.25Hz.
- Removed the primary coils for the BF damper.
- Checked cable connections and repaired some disconnections.
- Started the installation of F2. Assembled the FR in the F2.
Plan for coming weeks
[X-front]
- Measure the transfer functions of the BF and the F3.
- Lift down the BF into the corrugate tube.
- Extend the EQ stop for the F2.
[X-end]
- Vent the chamber on 5th.
- Remove the DP on 6th.
- Install the maraging wire for Cryo-payload with cables on 7th.
Type B (Mark)
Report for week of 2/26
- We routed all the cables from the BF level up via the flying saucer to the SF.
- Hirata-san tried filing the SF cap to improve the fit, but without much success.
- Hirata-san installed the Cu segments and cable clamps on the SF cap and the SF LVDT and FR cables.
- We cabled and tested the BF cap picos and the SF LVDT and FR. (The LVDT still needs a full calibration.)
- We worked on recovering the IM OSEM alignment.
Plan for week of 3/5
- Shoda-san at Mitaka.
- Hirata-san vacation Mon 3/5, then Kamioka
- Fabian Mitaka Mon-Tue (COMSOL training), Kamioka Wed-Fri.
- Others at Kamioka.
- -
Remove LBB temporary ballast masses from BS chamber.
- Finish recovering IM OSEM alignment.
- Calibrate SF LVDT.
- Lift SF/... section and check total mass and balance.
- Get SRM tank mushroom section installed (Hirata-san, Kimura-san)
- Set up for rebuilding of two BFs.
Plan for week of 3/12
- Shoda-san at Mitaka.
- Mark at ASJ (Chiba) Fri, then Mitaka.
- Hirata-san vacation Mon 3/5; Kamioka Tue-Thu; Mitaka Fri
- Others Kamioka Mon-Thu
- Install boxes in SR3 and SRM racks.
- Lay SR3 in-air cabling.
- Continue rebuild of BFs.
Plan for week of 3/19
- Mark at LVC meeting
- All others at Mitaka
- Make two sets of IM OSEMs
- Make last in-air pico adapter cable
- Make three in-air stepper splitter cables for SR2, SR3 and SRM.
- Set up Dummy BS prism removal.
Plan for week of 3/26
- Mark vacation.
- Shoda-san at Mitaka
- Others at Kamioka
- --
- F0 Prototype Blade Test
- Characterize blades.
- Choose best set of three.
- Remove cracked blades from filter in SRM area.
- Set up test weights in SRM area, first floor.
- Remove floor panel in SRM area, second floor.
- Install chosen blades.
- Measure load capacity.
To-Do Lists, Schedule
Vacation Info
- Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun)
- Hirata-san vacation, Mon 3/5.
- Fabian vacation, 3/26-4/27 (then gone).
Type-Bp (Shoda)
Past week report
- Takahashi-san, Aso-san, Ohishi-san, and Miyo-kun checked the suspension height. But the height was not much changed. So SF weight was not changed. I checked the LVDT trend since the installation. There are some jumps after data taking errors, including blackouts. Details will be uploaded to klog later.
- I prepared IP stepping motor med scripts. Actuation check is required.
- PRM guardian has an error that I could not solve.
Plan for coming weeks
OMMT & OSTM (Ohishi)
Past week report
Plan for coming weeks
Watchdog system (Tanaka)
Past week report
Preparation for assembly of mass products.-->Ongoing.
Adjustment and approval to vendors(Implementation adjustments and approvals for circuit boards.)-->
- Delivered( 5 of 6 substrates and Cables(assembled)).
- There are two casings yet(Adjusting with vendor)
Operation test of the initial product is completed. And I ordered the production of the residual mass-produced products.-->Pending delivery.
Plan for coming weeks
Preparation for assembly of mass products.-->
- Programming and Unit Testing(59 Items)
- Other necessary preparations.
- Adjustment and approval to vendors(Negotiating to guarantee machining delay of cases).
Other site works
- 2/26 - 3/9 Construction of the walls to isolate the arms better (for cleanliness) ＊3/8 or 3/9 no car in the access tunnel
- 3/12 - 3/16 Installation of the control systems for the large GVs
- 3/12 - Center area: preparation for pump down: connecting ducts.
Safety
- Incidents: no incident
- Foreseen risks
- Type-A: Crane work
- Type-B: Crane work, working with springs
- Type-Bp:
Discussion
Center area pump down
Vacuum flange status
- BS
- Top flange: O-ring inside, but covered with mending tapes (not vacuum compatible)
- Small service flanges in the bottom section near the top flange (2 of them): Opened once. Not tightened. Maybe no O-ring.
- Feed through flanges: Metal gaskets inside. Not tightened.
- A blank flange in place of a feed through flange: Maybe no O-ring. Not tightened.
- PRM
- Top flange: No O-ring
- Feedthrough flanges: Metal gaskets inside. Not tightened.
- PR2/PR3
- Top flange: O-ring inside. Not tightened. To be tightened by Futaba in the week of Mar. 5th.
- Feedthrough flanges: Metal gaskets inside. Not tightened.
Other preparations
- Securing cables
- D-sub connectors on the PR chambers are not fixed by screws
- Type-B team has about 150 pairs of the screws
- Type-B team will put screws for PR2 chamber in the next week
- Need to assign someone for PR3/M
OpLev monitoring
Aso will work with Shoda to implement Guardian alert system to send notifications when OpLev is kicked.
- PRM guardian is not running now. Aso will talk with Kokeyama and Yamamoto.
- Drift monitoring of the suspensions during pump down
- A strip tool should be prepared to show the drift trend
- Wiping inside the chambers
- PR2 and BS: Type-B team
- PRM and PR3: Ask someone
Phase 1 operation measurements
- We need to clarify:
- Minimum success criteria for each measurement
- Who will do the task
- Type-A transfer function measurements
- Main people: Okutomi, Miyamoto, Fujii(?)
- Criteria: Okutomi will discuss with Miyamoto
- Bs transfer function measurements
- Main people: Mark, Enzo
- Criteria: Mark will make a list of transfer functions to be measured
Travel Plans
- Travel (Week of 3/5):
- Takahashi: 5-9
- Okutomi: 5-8
- Sato: 5-9
- Ishizaki: 5-9
- Mark: 5-9
- Fabian: 7-9
- Hirata: 6-9
- Enzo: 5-9
- Shoda:
- Ohishi:
- Fujii:
- Tanaka:
- Kozu (ICRR): 5-9
- Arai (ICRR):
- Travel (Week of 3/12):
- Takahashi: 13 - 15
- Okutomi: 12 - 15
- Sato: 12 - 15
- Ishizaki: 12 - 15
- Mark: 12 - 15
- Fabian: 12 - 15
- Hirata: 12 - 15
- Enzo:
- Shoda:
- Ohishi:
- Fujii:
- Tanaka:
- Kozu (ICRR): 12 - 15
- Arai (ICRR):
Next meeting
On 2018/3/9(Fri)
VIS Meeting in Mitaka: 3/16