ICAP-2002 Abstracts and Posters

ICAP 2002 Abstracts and Posters

Beam-cavity Interactions in High Current Cyclotrons

Abstract

Measurements on the main cavities of the PSI 590MV ring cyclotron revealed a higher-order mode excitation at 1.8 mA operation that coincides with the 10th beam harmonic. This suggests that beam-cavity interactions could have an important effect in future high current cyclotrons planned for use in Accelerator Driven Systems so that more detailed studies are warranted. This paper describes initial calculations on the ring cyclotron cavities using the E (eigensolver), T3 (wakefield solver), and TS3 (particle-in-cell) modules in MAFIA. In order to model the geometric deformation due to air pressure and wall heating as calculated by ANSYS, SLAC’s Eigensolver Omega3P is used to take advantage of its unstructured grid and parallel computing features.

L. Stingelin, M. Bopp, H. R. Fitze (PSI) C. Ng, K. Ko (SLAC)

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