Photon Beam Commissioning Discussion July 7, 2014

Organization

Time: 4 pm EST
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

Attending: Elton, Eugene, Alexandre, Sasha (Hall D); Mike McCaughan, Todd Satogata (Accelerator); Richard (UConn); Curtis (CMU).

Announcements
Electron Commissioning (Todd/Mike)
1. Mike detailing procedures for commissioning electron beam based on experience in April
  - Much learned from beam delivery
  - Confidence that delivery this fall will be clearner
  - Expect: days to tune after spinning up to 5.5 pass; reasonable radiation without radiator
  - Initial goal for emittance is 20 nm*rad x 2. [Design is 25 nm*rad in x and 10 nm*rad in y]
  - Setup beam so that virtual focus of electron beam is at the collimator
  - Need to characterize the ion chambers (minimizing scrapping and tails)
  - nAmp bpms should be installed, but operation is not needed for commissioning
  - Fast feedback is also not critical
2. Simulation of beam environment
  - Richard will provide a geometry for Todd to run simulations
  - Richard will include the mapped tagger magnetic field
  - Todd will provide a magnetic field for the quad immediately upstream of the tagger magnet.
  - (Eugene) Suggest to have the quad off during initial commissioning.
3. Radiators
  - Production radiators are (10^-5, 3x10^-4, 10^-3)
  - Propose the following set for commissioning: (3x10^-5, 10^-4, 3x10^-4)
Photon Commissioning Draft (Eugene)
1. Discussion of draft plan submitted as homework to ERR
Goals for Aug 8 Review
Other business