July 31, 2020 Meeting Minutes

Post-meeting notes

Ricardo presented updated results of secondary electron trajectories (after SEY) with expanded steering magnet field map - previously the field map did not cover the entire beam pipe (this was fine for the focused primary electron beam, but not for ions and secondary electrons)
Carlos showed the positions of radiation monitors around the CEBAF (?) gun
Link to Google Doc is now on this meeting page (and will be on all future meeting pages).
- Josh will upload a QE difference plot to the outline. Cristhian uploaded a QE plot from June 2017 with the ion damage distribution overlayed. The distribution overlaps where the apparent QE damage is.
Josh showed preliminary simulations for the GPT/IBSimu benchmarking test. Will have a full presentation next week.
- Two simulations used a constant H2 density of 10^17 and two used Marcy's H2 density profile for CEBAF from Molflow.
- Will try a higher density to increase the # of ions produced in the simulation - this will hopefully show that ion transverse distribution matches the Gaussian transverse distribution of the primary electrons.
- Also need to filter the results by particle type (i.e. primary electrons, secondary electrons, SEY, ions)
- Need to use space charge - maybe should get potential from primary electron beam and use that? Not sure if it would be faster to do that...