[Halld-cal] Notes of SiPM status review posted

[Elton Smith]

Dear collaborators,

We apologize for network connections difficulties during the meeting.
Fernando and Carl reviewed the presentations that were posted and
available from the portal. There was substantial discussion during the
presentations.

Radiation tests of the Hamamatsu sensors is still planned in the next few
days. One sensor will be irradiated while it is powered and its dark
current will be monitored during the irradiation and afterwards.

Barring any unexpected results from the SiPM radiation tests, the
consensus was to move foward with the decision to instrument the Bcal with
SiPMs. This will entail completing all the details that are needed to
implement this solution both mechanically and electrically. We will need
to develop a plan for addressing all the relevant issues for this
technology including accurate estimates of calorimeter light yields,
temperature and bias stabilization, mechanical assembly and cabling, etc.

Measurements of the calorimeter light yields is important with the
Hamamatsu SiPMs. Carl will coordinate with George and Zisis regarding how
to transfer some to Regina.

Thanks for all the work to bring this study to this point.

Cheers, Elton.

Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton at jlab.org
(757) 269-7625
(757) 269-6331 fax