PREX/CREX Oct 23 2017 11:00am EDT

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Logistic information

 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
 International toll number:         408-740-7256
 PARTICIPANT CODE:                  847 917 938
 Offline room:   CEBAF Center F227


  1. Dump Shielding Summary: Ciprian slides
    1. half-target
    • KP: the number of coulombs for the half target should be doubled, but it looks like there should be some advantage to doing this
    • KP: run full target 4 in donut CG: will do
    • KK: object to change the target, because it’s not trivial for the machine to give us 150uA. we need to have the prex 1 configuration
    • KP: half donut without the donut change and 3/4 target
    1. H2O shield
    • DG: having a large volume watertight and assembling it in place.
    • SR: we should consider ionization and eating up of walls; creation of free radicals (chemical problems)
    • DG: i will ask Keith Welch
    1. fat pipe with prex2 end:
    • CG: this resolves both PREX2 and CREX dump radiation problems
  2. FLUKA simulations: Victoria
    • VO: updated geometry
    • VO: running simulations to benchmark the power deposition to G4
    • KP: ultimately we want to look at the radiation coming off activated materials that we can input into other simulations
  3. Progress at JLab haplog3444
    • KP: colimator build according to the design document
    • KP: the jacket is not pure tungsten but some alloy (KD17)
    • KP: the hall has already ordered hard line water connectors for the Q1s


Sanghwa P, Tyler K, Ciprian G, Tao Y, Ryan, Kent P, David A, Cameron C, Victoria O, Seamus R, Paul K, KK, Jay B, Paul S, Caryn P, Dustin M, Dave G, Bob M,