Agenda/Minutes of the VIS Meeting on 2018/2/9

2018/2/9 13:30 -

Participants:

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF,MPP)

• Type-A:
• Type-B:

Type-A (Takahashi)

Past week report

[X-front]

• The delivery of the maraging rod was deley. We didn't go to hunging by the short rod.
• Attached magnets to the primary coils and made interconnect cables.
• Installed the protection net into the cross tube.
• Opened the top chamber.
• Installed the frame lock.
• Attached the corn bellows onto the bottom of top chamber.
• Assembling the side stoppers for SFs.
• The optimal load of BF (190kg) is not acceptable for the cryo-payload. Designing an additional FR.

[X-end]

• Attached the additional vacuum gauge to the top chamber. The pressure was 0.16Pa.
• Checked the connection for LVDT on the F0-BF.

[Y-end]

• The position of IP was corrected so that the torsion mode frequency can be the lowest.
• Started the cool down of EYC cryostat on 7th.

[Broken blades]

• Franco reported about the sample of broken blades. The sample has two different zones.
• Checked dimensions of some blades. The width was the same, but the thickness was different.
• Dismounted the blade for SRM from the arc jig.
• Nikhef can investigate the broken blade too.
• No information from the maker.
• Asking the companies about the optimal thickness as material for new blades.

Plan for coming weeks

• Hung the DP by the short rod.
• Attached the additional FR and tune the BF again.

Type B (Mark)

Past week report

Plan for coming weeks

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Ohishi)

Past week report

• Ordered 4/12 custom-made small bellows for vertical vibration isolation.
• Some drawings of the hanging jig parts were not updated.
  • need to reorder some mechanical parts.

Plan for coming weeks

• OSEM test

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.)-->Ongoing.

  • The scheduled delivery date is 22th Feb(final).-->Adjusting.

Plan for coming weeks

• Preparation for assembly of mass products.
• Adjustment and approval to vendors(Implementation adjustments and approvals for circuit boards.)

Other site works

• Feb 18: Black out of the Mozumi buildings
• 2/26 - 3/9 Construction of the walls to isolate the arms better (for cleanliness)
• 3/12 - 3/16 Installation of the control systems for the large GVs

Safety

• Incidents:
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

• Next FY budget

Travel Plans

• Travel (Week of 2/12):
  • Takahashi:
  • Okutomi:
  • Sato:
  • Ishizaki:
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR):
  • Arai (ICRR):
• Travel (Week of 2/19):
  • Takahashi:
  • Okutomi:
  • Sato:
  • Ishizaki:
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR):
  • Arai (ICRR):

Next meeting

On 2018/2/16(Fri)