• KAGRA
• Recovery2024
• IFIPRM

Suspension Condition of IMMT1/2. (Takahashi, Ushiba)

IMMT1/2

• Mechanical Motion
  • Smooth pico motion and its default position
  • Gaps between magnets and coils

  • Gaps between EQ stoppers and mirrors -> confirmed less than 1mm.
• Electrical wirings

  • Coil resistances and inductances ->

  • Isolation of Wiring from coils to flanges(pico and mag-coil) ->
  • Fixing on tables is tight and reliable?
• Smooth Mag-coil motion and balance and TFs
• Spectrum

• Mirror conditions(??)
  • Clean around the center?
• Beam dump(T.Akutsu)
  • Beam shield
  • Beam dumps were additionally added?
    • In basic, No. Relocation was done.

Beam Path from IMC to PRM (Yokozawa, and Akutsu)

STM1/2

• Mirror mount stability with cables
• Beam positions on them
• Trans beam from STM2

IFI to IMMT1

• IFI injection: No clipping
• Beam position on IMMT1
• Trans beam of IMMT1
  • No change to ISS path?
  • ISS beam/CWP reflection beam extracting (??)
  • the beam paths are clear?
  • The beams hit around the center of windows?
  • The reflected beams on the windows are dumped?

IMMT1-IMMT2

• Beam clearance: no problem
• Beam position on IMMT2

IMMT2-PRM

• Main beam/misaligned beam clearances: no problem against the beam dumper
• The misaligned beam position: hits on the dumper(?) and the temp enhancement was detected.

Around PRM

• Beam position on PRM
• IR beam in the midsize baffles(HR/AR side)

Beam Dumper

• Thermometer works?

Oplev Check for IMMT1. (Yokozawa-kun)

Beam Power

Beam Path Clearance

• IMMT1

QPD centering

Calibration

PYL Separation(after pumping?)

Spectrum Health

Oplev beam's stray light influence

• almost no light? as before.

Oplev table covering

• we will do this after closing.

(6)Vacuum system (Kimura/Uchiyama and their selected persons)

Clean inside as much as possible including bellows duct with TMP

Check the flange seal surface condition where were opened.

• KF400 flange with a Copper plate-> change with a curved flange.

Decide where the elastomer/Metal gasket will be used.

Logistic to reinstall the bellows duct with TMP.

• Sawada-sana nd Mirapro members call