Agenda/Minutes of the VIS Meeting on 2019/5/17

2019/5/17 13:30 -

Zoom Meeting

Participants:

Progress report

Schedule Chart

Site work schedule: [[|XLSX]]

Type-A : (PDF/MPP)

Type-B: (PDF/MPP)

Type-C: (XLSX)

Type-A (Takahashi)

Past week report

• To match the relative height of ITMX and ITMY, adjusted positions of F2/F3/BF keystone using the FRs. Corrected position was -2.1mm for ITMX and +5.9mm for ITMY respectively.
• The F3 stepping motor in IYV can't work by the rack mount driver.
• The drift of GAS filters due to pump down or cool down was not so large (less than 1mm in total). The effects due to temperature change are still under investigation.

Plan for coming weeks

Type B (Mark)

Past week report

Plan for coming weeks

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Takahashi)

Past week report

• The foot print (200mm) of TAMA-MC suspension is different from one (250mm) of present OSTM suspensiotn.
• The ghost beam shield attached to the suspension frame is required. The ray trace around OSTM is necessary.

Plan for coming weeks

• Ask Sato-san to check the 3D model including the OMC chamber.

VIS electronics (Tanaka)

Past week report

Plan for coming weeks

Other site works

Safety

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

Discussion

• Watchdog

  • Improved Digital Watchdog (Shoda) test.pngconfig.png

    • Almost the same function as the previous WD, but the WD flag is gradually increased so that the outputs would are gradually decreased to zero. However, I found that this system does not have any meaning if DACKILL system works in the current way...
  • Modified hardware WDS for coil open operation (Tanaka)

Travel Plans

• Travel (Week of 5/20):
  • Takahashi:
  • Sato:
  • Mark:
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanioka:
  • Tanaka:
  • Terrence:
• Travel (Week of 5/27):
  • Takahashi:
  • Sato:
  • Mark:
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanioka:
  • Tanaka:
  • Terrence:

Next meeting

On 2019/5/24(Fri)