Date: 2024/7/1

I performed WSK/GSK calibration at ToyamaU with the new automation system.

The main result is the following.

The difference from the results of O4a is about 2%, which was 0.142.

• The reason is not clear.
• Investigation I did today:
  • Cable effect: not observed for GSK and WSK.
  • Beam position at port: no effect.
  • Incident angle could not be changed.
    • Both yaw and pitch angle should be better than O4a.

Detailed procedure

1. Move WSK and GSK to be "formation A".
   1. Measure the dark noise (N=2000)
   2. Measure the main data (N=200)
2. Move WSK and GSK to be "formation B".
   1. Measure the dark noise (N=2000)
   2. Measure the main data (N=200)
3. Convert the result to calc alpha_WSKpGSK.
4. Repeat 1-3 for 10 times.

Detailed report: link