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PISCES II : 2.5-D RF CAVITY CODE, AN EXTENSION OF SUPERFISH

Yoshihisa Iwashita

Accelerator Laboratory, Nuclear Science Research Facility

Institute for Chemical Research, Kyoto University

Gokanosho Uji, Kyoto 611, JAPAN

### Abstract

The RF cavity code PISCES II can evaluate all the eigenfrequencies and fields
for arbitrarily shaped axially symmetric RF cavities. The solutions include
symmetric (m=0) and asymmetric modes (m>0) with 2.5-D technique of assuming the
sin mq and cos mq dependencies. Using Finite Element Method with Nedelec
elements, the electric or magnetic components ( (Eq,Er,Ez) or (Hq,Hr,Hz) ) are
calculated[ ]. The resulted eigenvalue system has many zero-eigenvalue
solutions, which can be filtered out by using zero-filter technique from
the set of solutions. The eigensolutions of the specified number are obtained
simultaneously from non-zero lowest frequency.

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