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

• KAGRA/Subgroups/VIS/TypeB/March2018

• KAGRA/Subgroups/VIS/TypeB/April2018

• KAGRA/Subgroups/VIS/TypeB/ToDoBS

• KAGRA/Subgroups/VIS/TypeB/ToDoSR

• JGW-L1807779-v1 Type B Schedule (SR)

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.
  • Securing cables

  • OpLev monitoring

  • Drift monitoring during pump down
• Phase 1 operation measurements
  • Minimum success criteria for each measurement
  • Who will do the task

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