LYRAN: A program for the analysis of linac beam dynamics

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Abstract

The FORTRAN program LYRAN has been written for use in analyzing the beam dynamics of superconducting heavy ion linacs. The program is based on the program LYRA developed by A.H. Scholldorf at SUNY Stony Brook, but that original program has been extensively extended, modified, and restructed. LYRAN transports a group of input particles randomly distributed on a selected distribution function through linac elements which include rf accelerating and bunching elements, dipole and quadrupole magnets, electrostatic elements, and drift spaces. Second order corrections to dipole and quadrupole fields are included. A nonlinear optimization routine is incorporated, providing fast and efficient determination of accelerator configurations and parameter settings that provide desired beam properties. Beam envelope plotting is also included to provide a graphic display of beam characteristics.

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On leave from Department of Technical Physics, Beijing University, Beijing, P.R. China.

∗∗

On leave from Department of Nuclear Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.

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