BLTWG Meeting 10/23/2017

Organization

• Time: 11:30 EDT
• JLab meeting room: A110
• Connecting: detailed instructions are here
  • H.323 ip address: 199.48.152.152
  • web browser: https://bluejeans.com/536076821
  • phone: 408-740-7256 or 888-240-2560
• Conference id: 536076821
• Present:

Agenda

1. Announcements
2. Planning for improved beam normalization (TAC runs) - discussion
   • improved limits for low-current operation
   • limits on radiator thickness from halo?
   • effective thickness of wire radiator
   • systematics from collimation restriction
   • systematics from collimator offsets
   • systematics from absorption (simulation)
3. Planning for fast raster in Hall D - discussion
   • results from early test
   • size of pattern at collimator
4. Planning of radiators for F2017/S2018 running
   • JD70-100 : 58um, the one we ran with in S2017, default choice for F2017
   • JD70-105 : 54um, essentially same size and thickness, quality as JD70-100, unused
   • JD70-104 : 20um, proposed for evaluation and testing
5. Any other business