Jan 25, 2011 Calibration/Monitoring

Teleconference Time: 09:00 CST (Regina) / 10:00 EST / 17:00 GMT+2 (Athens)

• ESNET preferred, EVO as a backup

Background information

• Monitoring R&D issues for the relative gain calibration and monitoring system for the calorimeters and possibly other detector systems.
• Calibration Specifications Table for BCAL, FCAL, TOF and START
• Calibration and Monitoring System Meetings Previous minutes

Action Items

1. Why was the dynamic range of the APD tested over 20-450? Where there intrinsic limitations? Can it be extended to form a ratio of 400?
2. Can George calculate the % deviation from linearity on his plot?
3. Can George verify that the two-setting operation (low bias for near, high bias for far SiPM flashing) is feasible?
4. What is the approximate power dissipation for each board? (Just LPM since LPCM will be further away).
5. Zisis will bounce another idea for the one-setting operation mode.
6. USM should be contacted to send more LGs to Athens (and eventually Regina).

Tentative Agenda

1. Review goals/objectives of Monitoring system and past discussions.
2. George Voulgaris' slides: Media:AnswersaboutLED.pdf
3. Discuss Matt's suggestion: groove in light guides, radial fibres. (sent as email)
4. Summarize info, prepare recommendations and discuss it in Working Group to reach conclusion and proceed with Athens Construction MOU (decision by May 2011).

Minutes

Attendees: Christina (Athens), Elton (JLab), Zisis (Regina)