October 27, 2015 - Mott Group Meeting

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Let's meet on Tuesday October 27 @ 11am in TED 2504 for a post-Run II discussion.


  1. Run II and analysis tasks
  • Rate v. Thickness: X-axis (compare w/ previous rates measurement, Lebow, FESEM), Y-axis (time and energy cuts)
  • Asymmetry vs. Energy: X-axis (beam momentum results), Y-axis (time and energy cuts)
  • Asymmetry vs. Thickness: X-axis (rate, Lebow, FESEM), Y-axis (time and energy cuts)
  • Momentum vs. Gradient: X-axis (gradient), Y-axis (beam positions, DL, earth, steering)
  • Emittance at MQJ0L02: measurements made for X/Y planes, on-line results look OK, but cuts to improve
  • Energy spread: harp scans at 3 different pairs of quad measurements, should be consistent with same emittance/Twiss at MQJ0L02
  1. Discuss Charlie's writing assignments

To Do

  1. (Joe) summarize process and results to measure beam energy
  2. (Joe) what photocathode did we use for Run I?
  3. (Daniel, Riad, Tim, Marcy) Corroborate the Lebow and FESEM measurements with foil rate measurements to assign X-axis and uncertainty for each foil
  4. (Tim) Explore and recommend heuristic fit approach for target thickness
  5. (Riad) Incorporate energy spread correction in data analysis
  6. (Daniel) Summarize Run II with cuts (T=+/- 2sigma, E=-1:3 sigma)
  7. (Daniel) Compute asymmetry is 0.5 sigma slices to explore dependence and determine appropriate energy cut
  8. (Marty, Tim, Riad, Joe) - Resolve approach for second scattering distribution

Blue Jeans and Wiki

Toll Free Phone number: 1-888-240-2560
Int'l Call Phone numbers: http://bluejeans.com/numbers
Meeting ID: 871029730#
Web connection for desktop sharing: https://bluejeans.com/871029730
Wiki: https://wiki.jlab.org/ciswiki/index.php/October_27,_2015_-_Mott_Group_Meeting