The computer code bperm for wakepotential and impedance calculations

The program bperm is a 2-dimensional code for wakepotential and impedance calculations based on an analytic method of boundary perturbation. It can be employed for periodic structures with rotational symmetry and is useful for structures with small discontinuities such as shielded bellows and valves, tapered transitions, weldments, etc. One principle used in developing the code is portability. It is written in Fortran 77 and is entirely self-contained, with no machine-dependent calls and with simple file input not relying on the namelist extension. The post-processor gnuplot has been used for plotting. The code runs on UNIX as well as on VMS computers. It is currently stored on the Common File System (CFS) at the National Energy Research Supercomputer Center (NERSC)