General Meeting Summary 9/27/18

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MAGNET (Bogdan)

  • Yoke assembly is essentially complete, next will be the coil.
  • Tests can start when coil is assembled


HV BASES (Julie)

  • Assembly and testing is ongoing. 25% of the total bases have been assembled and are being tested. So far only one assembly was observed to spark - after a few days. Discussion about testing time dependence of performance.
  • Some of the bases were sent to IPNO for prototype tests
  • Discussion about single component testing of PMTs, e.g. by JMU


CRYSTALS AND PROTOTYPE (Vladimir)

  • Two crates (80 crystals each) were sent back to SICCAS
  • First five crystals of 100 arrived from Crytur - overall these seem to represent a different category of quality control
  • visual inspection including green laser - all look very good
  • dimension measurements - on average 20.45mm x 20.45mm in area, all within the -100um/+0um tolerance
  • transmittance measurement - cutoff ~350nm, T@420nm ~70% (c.f. SICCAS ~64%)
  • very uniform so far - interesting to see if this will hold for larger quantity
  • Prototype
  • Assembly ongoing, stacking had to be redone due to corroded brazed strips (reason for corrosion seems to be due to method, optimization possible)
  • Installation in Hall D could be as soon as end of October or alternatively around Thanksgiving, but before the end of the year, initial commissioning test plan has been developed


FRAME AND MONITORING SYSTEMS

  • Construction and testing ongoing - update at next meetings


NEXT COLLABORATION MEETING

  • Idea is to schedule adjacent to Hall A/C winter meetings as in previous year - waiting for dates to be known
  • Should start discussing topics in next NPS meeting


OTHER

  • Presentation of photographs of PADME calorimeter with hundreds of channels to illustrate cabling implementations (Bogdan)


  • Brief discussion about progress with readout - update at one of next meetings (Alex)
  • Mention of meeting with CPS working group to discuss review report items and path forward
  • Discussion about assembly of NPS in scenario when some components are delayed


NEXT MEETING: THURSDAY 18 OCTOBER AT 8:00 AM (EDT)

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