PISCES II: 2.5-D RF cavity code

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) assuming the sin m theta and cos m theta dependencies Using Vector Finite Element Method, the electric or magnetic components are calculated. The resulted eigenvalue system has many zero-eigenvalue solutions, which can be filtered out by zero-filter technique from the set of solutions. The eigensolutions of the specified number are obtained simultaneously from non-zero lowest frequency.