Agenda for Bcal Readout Review April 23-24

[Elton Smith <elton@jlab.org>]

Agenda for Bcal Readout Review April 23-24
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Room: F224-F225


Monday morning:

10:00 am
- Summary of Bcal characteristics including number of expectected photons,
granularity, etc (George).
- Update on Specifications and Evaluation Document (Elton)
- Review of SiPM mesurements (Carl)
- Options and cost implications (Elke)
- Deliberations on what needs to be discussed with SensL in the afternoon
- Add list of open action items

Monday afternoon:
1:30 Meet with Carl Jackson from SensL
- Continuation of unfinished items from the morning

Tuesday morning:
- video conference including Athens
- Summary of options using Fine-mesh pmts
- Report by Christina on studies of bcal tests with preshower material


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Action items:

o Photon detection efficiency (Carl, everyone) - There was some confusion
concerning the reported measurement by Carl (of 4.4%) at the collaboration
meeting. This value is consistent with the information from SensL for the
C20 SiPM which was tested.

o Number of tubes that contribute to dark current (George).
- Elton estimates noise from 32x2 tubes (one module) get added into the
energy sum for one shower.
- Elke wil ask the DESY guys what they really measured PDE or QE

o Impact of photon thresholds on physics (Alex)
- thresholds as a function of angle?

o Uniformity of response
- effect on resolution (Richard)
- Gain vs breakdown voltage, and gain vs breakdown voltage (SensL)
- Gain vs rate (Elke: I think a rate uniformity is also important I
personally find the plot on page 12 of /home/elke/public/Garutti.ppt
interessting)

o Dynamic range for calorimeter (George)

Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625