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Simulations of the Study 2 Cooling Channel with Realistic Absorber Windows

Simulations of the Study 2 Cooling Channel with Realistic Absorber Windows. Tom Roberts Illinois Institute of Technology. Geant4 Simulations. This is a complete reimplementation of the Study 2 Cooling channel Geant4 5.0 Fermilab Beam Tools 1.0 HistoScope 5.0

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Simulations of the Study 2 Cooling Channel with Realistic Absorber Windows

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  1. Simulations of the Study 2 Cooling Channel with Realistic Absorber Windows Tom Roberts Illinois Institute of Technology

  2. Geant4 Simulations • This is a complete reimplementation of the Study 2 Cooling channel • Geant4 5.0 • Fermilab Beam Tools 1.0 • HistoScope 5.0 • All results use the 2631 events from EmittBunch5-207-Cooler.hst • Realistic absorber and vacuum windows • HistoScope used to greatly speed up manual tuning

  3. Bellows Absorber Windows LH2 Vacuum Vacuum 35 cm 48 cm 180 u 216 u 36 cm Ed’s Clearance Max. Easy Value 6 cm 12 cm (This is a hand-drawn figure roughly to scale, actual window data are from H2-Bellow-Window-concave-convex-coord-3.xls)

  4. (TolCooler207 is an old run)

  5. (TolCooler207 is an old run)

  6. (TolCooler207 is an old run)

  7. Summary at End of Cooling Channel * Cuts: 140 < P < 260 MeV/c, |Dt| < 1.1 ns, Acclong = 15,000 cm mrad, Acctrans = 15,000 mm mrad

  8. Conclusions • The bellows windows used in these simulations should achieve cooling performance comparable to that in Study 2. • There are some puzzles related to RF tuning still under investigation.

  9. Backup Slides

  10. Beam Characteristics at End of Cooling Channel (TolCooler207 is an old run)

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