General Meeting Summary 3/19/15

PLANS FOR PWO CRYSTAL TESTS

• Consistency check of Idaho results with Rainer's setup in Giessen

• Rainer can do irradiation tests as soon as we send him the crystals
• Discussion about how many crystals to send to Giessen.
• Crystals expected to be released from Idaho in next few days. All crystals will be shipped back to JLab (contact is Walter) and from there crystals # 2, 3, 6, 8, and 9 will be shipped on to Rainer directly. Action items: 1) find out when crystals can be shipped from Idaho and process documentation needed (Carlos, Hamlet, ...) , 2) initiate shipment to Giessen (Rolf, Carlos, Hamlet, ...)

• Received crystal samples, reflector, shrinking tube, APD readout components from Rainer

• Discussion of how these materials could be used for the upcoming prototype tests

• Further tests with remaining PWO crystals at JLab

• Transmittance tests of the 5 crystals received in December 2014 - thus far have not been measured
• Prototype tests with beam in Hall A until summer
• Crystal recovery: depends on temperature (see slide 18 in Rainer's talk from Nov 2014 NPS collaboration meeting). For further studies of radiation hardness may need to consider a temperature stabilized system.
• Crystal light yield: Light yield depends on temperature, e.g., Rainer's measurements were conducted in a temperature stabilized system at 18 degrees (see his talk from Nov 2014 NPS collaboration meeting). A temperature stabilized system could be beneficial for these tests.
• Readout with APDs compared to phototubes

NPS PHYSICS

• Discussion of planned submissions of LOI or proposals to PAC43

• TCS with transverse target - will be discussed in more details in next meeting (Arthur)

ITEMS FOR NEXT MEETING:

• TCS LOI for PAC43

• Crystal studies at JLab and Giessen

• Other...

NEXT MEETING: THUR., 9 APRIL 9:00 AM (EST)