Integrated Dark Current Radiation Study for Accelerator Structures Using ACE3P and Geant4

Le résumé fourni par la source

A simulation workflow, ACE3P-G4, has been under development to study dark current (DC) radiation effects using ACE3P and Geant4. ACE3P-G4 interfaces particle data transfer and geometry between the electromagnetic (EM) cavity simulation code ACE3P and radiation code Geant4 and aims at solving large-scale problems using high performance computing. ACE3P-G4 starts with calculating the operating mode in the vacuum region of an accelerator structure and tracking field-emitted electrons under the influence of the EM fields of the mode using ACE3P, and then follows by particle data transfer at the vacuum-wall interface for subsequent radiation calculation in the wall enclosure materials using Geant4. This paper will demonstrate the ACE3P-G4 simulation workflow by performing large-scale dark current radiation calculations for the KEK 56-cell traveling-wave structure, and compare the simulation results with measurements at KEK. The efficiency of performing simulations on NERSC supercomputer Perlmutter will be presented.

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