Detailed task list of PCal is listed here.

X-end PCal

Urgent

• TxPD1 repairing
  • Repaired. To be checked.
• OFS2 closed loop functionality repairing
  • Relay is OK. Investigating the cause.
• DAC noise problem
  • With DAC cable, very large noise and offset are observed. It may be difficult to set working point.

2nd-urgent

• DAC input bias between MEDM and actual
• Laser remote control
  • Setup done. LAN cable should be replaced to shorter one.
• Stray light
  • Put dumpers
    • Borrowing 2 from Toyama univ. They has to be returned on 9/19 or 20.

~9/11

• Periscope install
  • Equip picomoters to the mirror

~10/3

• Complete periscope install
• Rx module alignment

~10/20 first test to inject PCal laser to the X-end test mass

• AOM response measurement
  • Check working point is consistent to that in KEK
• OL/CL TF measurement
• WSK measurement
  • Modification is required from LIGO's procedure.
  • Code for WSK measurement analysis
  • To be delivered on 9/19 or 20 to Toyama Univ.
  • May have to prepare voltage calibrator to calibrate readout by DGS.

~X-arm commissioning line injection

• BPM test
  • Picomoter setting
• Preparation for X-arm commissioning calibration line injection

~O3

• RPN measurement
• Laser noise measurement
• Harmonics noise measurement
• VGA noise measurement
• Excitation noise measurement
• Peak stability test
• Shot noise
• Offset input noise
• Noise model
• Unstable D-sub connection at Tx module
  • Some connectors are dead.
• Cable arrangement
• OFS upgrade
• Operation tool preparation

Bonus work

• AOM current
  • Sometimes over 0.5 V ?
• Take care about grounding
• Initial laser power just after turned on seems too small ?

Pre-categorization

Y-end PCal

Laser power calibration setting in Toyama Univ.