Suspension Condition of PR2, PR3, BS, SR3, SR2, SRM. (Takahashi-san, Ushiba-kun, Hirata-san)

PRM

• Mechanical Motion
  • Smooth pico motion and its default position
  • Gaps between magnets and coils
  • Gaps between EQ stoppers and mirrors
    • PR2
      • • The balance of the TM was recovered by regluing of three magnets.
        • The wire cramp on the IM for the TM was tightened.
        • Height adjustment.
      • • Position measurement of the traverser.
      • PR3
      • BS
      • SRM
      • SR2
      • SR3
• Electrical wirings

  • Coil resistances and inductances ->

  • Isolation of Wiring from coils to flanges(pico and mag-coil) ->
  • Cable repair for the BF damper. The lead wires were glued to prevent direct touching of the wires to the coil bobbins.
  • Fixing the cable connector for SF LVDT
• Smooth Mag-coil motion and balance and TFs
• Spectrum
  • PR2:
  • PR3:
  • BS:
  • SRM:
  • SR2:
  • SR3:

• Mirror conditions(??)
  • Clean around the center?

PR2,3,BS,SRM,SR2,SR3 Cleaning

PR2

PR3

No cleaning for BS, SRM, SR2, SR3

Suspension Health check PR2,3, BS, SRM, SR2, SR3. (Takahashi-san, Ushiba-kun)

Oplev Check for PR2,3,BS,SRM,SR2,SR3. (Yokozawa-kun)

Activities:

Beam Power

Beam Path Clearance

QPD centering

Calibration

Spectrum Health

Oplev beam's stray light influence

• almost no light?

Oplev table covering

• we will do this after closing.

Beam path and Baffle Position

Leaked hermetic flange repair on BS

Vacuum system (Kimura/Uchiyama and their selected persons)

Clean inside as much as possible including the bellows duct with TMP

• maybe impossible from the only side hatches.

Check the flange seal surface condition where were opened.

Decide where the elastomer/Metal gasket will be used.

Check the opened flanges and the top hut of PRM2, 3

Logistic to reinstall the bellows duct with TMP.

• Sawada-sana and Mirapro members call
• If you use chain block, please be careful of its fixing
• Careful cramp tightening near oplevs.