COSY 5.0 - The Fifth Order Code for Corpuscular Optical Systems
AbstractCOSY 5.0 is a new computer code for the design of corpuscular optical systems based on
the principle of transfer matrices. The particle optical calculations include all image
aberrations through fifth order. COSY 5.0 uses canonical coordinates and exploits the
symplectic condition to increase the speed of computation.
COSY 5.0 contains a library for the computation of matrix elements of all commonly used
corpusular optical elements such as electric and magnetic multipoles and sector fields.
The corresponding formulas were generated algebraically by the computer code HAMILTON.
Care was taken that the optimization of optical elements is achieved with minimal
numerical effort. Finally COSY 5.0 has a very general input code resembling a higher
M. Berz, H. C. Hoffmann, H. Wollnik, Nuclear Instruments and Methods A258 (1987) 402-406
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