General Meeting Summary 7/27/17

PAC45 RECAP

• Committee saw one technical (CPS) and two science presentations (polarized WACS and KLong)- results were distributed by email

• Report will be available and posted shortly

• Next steps: continue working group meetings on CPS to optimize design, e.g. shielding

MAGNET ASSEMBLY AND TESTING

• Discussion about W. Akers drawing of magnet and detector frame in test lab and availability of cooling water and electrical services

• one good option for power supply for NPS magnet is that from HKS
• some re-arrangement of the designated area may be needed to make the required field mapping measurements - most efficient may be to attach the mapper to the magnet, at most will map 3x distance away from magnet gap

• Update on magnet components:

• Corrector coil is at JLab
• Main coil expected end of August
• Yoke expected end of August

• Next steps:

• Provide W. Akers with a drawing/picture of the power supply to be used
• Design of mapper - Charles will provide the required specifics of the mapper along the beam line

NPS FRAME

• Discussion about curing system design - IPNO will test different LEDs to which one most suitable for curing and do not damage the PMTs

• Note that DVCS found that PMTs are affected (gain changes) by blue light curing even with HV offf

• Discussion about flexibility of installation of curing system since PMTs are not removable

• Middle August will optimize frame design (interference and symmetric part) with designer

Next steps:

• Send a few PMTs to IPNO for curing system testing

NPS HV BASES AND PMTS

• 35 PMTs are on order from OU, 50 PMTs have arrived at JLab

CRYSTALS

• Discussion about ongoing chemical analysis at CUA

• 100 crystals expected to arrive at JLab end of month

• Discussion about assembly once all components available - make a plan for that

• Next steps:

• writing documentation of crystals tests and also including responsibilities and work flow

NEXT MEETING: 24 AUGUST at 9:00 AM (EDT)