December 09, 2021

Meeting Information

GEM @ Stonybrook Meeting
Wednesday December 08, 2021
3:30 pm, ET

Agenda

1. Kicking off the Gem work planning at Stonybrook.

Meeting Disgust

1. Project background
   • Stonybrook is assigned to construct 12 out of the 28 layers of GEM trackers for the Moller experiment
   • Two prototype trackers to be constructed by late 2022. GEM material (three rectangular sheets) will arrive SBU in early March; frames will arrive later
2. Sub-tasks (required volunteers, or will be assigned):

1. • Preparation stage:
   • Clearing out a perimeter in the basement lab (Bill, Vassu, Weibing).
   • setting up the cleanroom.
   • Setting latest JLAb DAQ system: CODA, and configure it to be used for calibrating the prototype GEM trackers (Bill)
   • Looking at parsing BigBite date to understand the expected performance.
   • Simulation to get expected GEM response? (Not a priority right now)

1. • Manufacturing stage:
     • Manufacturing/stretching GEM sheet and mount to bracket (with glue) inside the cleanroom (Klaus and Prakhar)
   • Calibration stage:
     • Operating X-ray gun in in grid and mapping out the efficiency and gain in each sector of the GEM response: efficiency, uniformity, gain, etc (Bill & others)
3. Additional equipment needed:
   • Cleanroom
   • Gas system? CO2 and Helium mixture.
     • How good does the mixture have to be? Does the mixture ratio matter?
   • X-Ray gun mounted on arms that move in small stepped