Aug 5, 2010 Calorimetry

Teleconference Time: 11:00 a.m. EDT

• ESNET and EVO session
• Phone in CC F326 is 757-269-6337
• Phone in the Regina Videoconference Suite is 306-585-4204
• Phone only if requested:
  • +1-800-377-8846 : US
  • +1-888-276-7715 : Canada
  • +1-302-709-8424 : International
  • then enter participant code: 77438230# (remember the "#"). Phone line by request only.

Items for followup from previous meeting(s)

1. Monitoring
   • USM: Send drawings of guides to be machined (soon). Send 4 unpolished guides to UofR and 2 unpolished guides to Athens.
   • Bcal: Testing to see if LED sources can be viewed by pmts on both sides of the module (UofR/UofA).
2. Fcal
   • Decision on rad hard detectors
   • Ashot to send type of Hamamatsu pmt used for PRIMEX
   • Elton and Ashot to meet and resolve any discrepancies between the simulations.

Discussion of Options for Radiation-Hard Insert

Options for Radiation-Hard Insert

Tentative Agenda

1. Announcements
2. Review of Action Items
3. FCAL
   1. Construction status
   2. To shashlyk or not to shashlyk.
4. BCAL
   1. Construction Status
   2. Cosmic-ray normalization runs
5. Update on SiPM radiation hardness (Elton)
   • Time @10^8 g/s for Dark rate to increase x10 is 3.25 years (10^7 s/year) x factors
   • This corresponds to a fluence of 10^9 1MeV neutron eq/cm^2.
   • factors = self-annealing x cooling x DR/10 x temperature annealing
   • self-annealing = 2 (Measured in HallA irradiated samples, needs checking for cooled AmBe irradiated samples)
   • cooling = 3 (For non-irradiated samples DR -> 0.3 DR between 20 and 5 deg C, needs checking for irradiated samples)
   • DR/10 = 0.5, Study of degradation of threshold with dark rate. See Media:Plot threshold1.png with reference to Matt's resolution calculations
   • temperature annealing = ? (additional annealing gains by raising temp ~ 80 deg C, needs checking)
6. Simulations
7. Other Updates

Minutes

Attendees:

1. Announcements
2. Review of Action Items
3. FCAL
   1. Construction status
   2. To shashlyk or not to shashlyk.
4. BCAL
   1. Construction Status
   2. Cosmic-ray normalization runs
5. Update on SiPM radiation hardness (Elton)
   • Time @10^8 g/s for Dark rate to increase x10 is 3.25 years (10^7 s/year) x factors
   • This corresponds to a fluence of 10^9 1MeV neutron eq/cm^2.
   • factors = self-annealing x cooling x DR/10 x temperature annealing
   • self-annealing = 2 (Measured in HallA irradiated samples, needs checking for cooled AmBe irradiated samples)
   • cooling = 3 (For non-irradiated samples DR -> 0.3 DR between 20 and 5 deg C, needs checking for irradiated samples)
   • DR/10 = 0.5, Study of degradation of threshold with dark rate. See Media:Plot threshold1.png with reference to Matt's resolution calculations
   • temperature annealing = ? (additional annealing gains by raising temp ~ 80 deg C, needs checking)
6. Simulations
7. Other Updates