Detailed task list of PCal is listed here.

X-end PCal

Urgent

• Excitation port noise

2nd-urgent

• Stray light
  • Tx PDs detect light even if the AOM input is almost 0.
  • Put dumpers
  • Module wall will be black coated.

~11/3 first test to inject PCal laser to the X-end test mass

• Rx module alignment
  • Rx PD done.
  • QPD alignment
• AOM response measurement
  • Done. To be checked periodically.
• OL/CL TF measurement
  • Done.
  • OFS board gain seems strange.
  • Strange bump in AA/AI (~6 kHz)
• WSK measurement
  • Code for WSK measurement analysis
  • X-end done, but it may affected by stray light.

~X-arm commissioning line injection

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

~O3

• RPN measurement
• Laser noise measurement
• Harmonics noise measurement
• VGA noise measurement
• Excitation noise measurement
  • DGS part seems not noisy, but cause large noise when connected to the OFS.
• 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

• Periscope re-installation

Laser power calibration setting in Toyama Univ.

~Y-arm commissioning

• Prepare cross calibration setup and calibrate an integrating sphere