Cosmics test plans

Objectives:

• Test drive the AIEC software
• Demonstrate that the CDC gain is stable

Strategy:

• Designate 2130V as the nominal HV for cosmics, to raise more hits above the noise, but keep 20V headroom for the AI.
• Tell the AI that the HVB current is constant at 9uA so that it can operate within the range of its trained data
• Use 1V steps and 1h runs
  • Starting new run every hour for 2 weeks may not be feasible. Devise scheme to break up long runs?

Needs:

• AIEC software to read epics and wait for a stable period before calculating the gain and setting the HV
• Method for scaling the HVB current to what it would be at the nominal HV before running the AI - will not be needed for cosmics but will be needed for CPP.
• Script to project dE/dx for 4-10 GeV tracks, fit it and calculate the gain factor
• Code to set whole quadrants to same value (cdc_tool.py)

Questions:

• Do we need to force a B field in the reconstruction sw (wait for Simon to answer)
  • Simon reported progress on straight track reconstruction (email to David and Naomi Feb. 24th)
• Full DAQ or standalone DAQ?
  • Ask Sergey for configuration with only CDC, BCAL
• When are we doing this?
  • March 1-14, 2022