Design of the central region in the Warsaw K-160 cyclotron

This paper describes the design of the central region for h=2 and 3 modes o f acceleration in the Warsaw K-160 cyclotron. The central region is unique and compatible with the two above-mentioned harmonic modes of operation. On ly one spiral type inflector will be used. The electric field distribution in the inflector and in the four acceleration gaps has been numerically cal culated from an electric potential map produced by the program RELAX3D. The geometry of the central region has been tested with the computations of or bits carried out by means of the computer code CYCLONE. The optical propert ies of the spiral inflector and the central region were studied by using th e programs CASINO and CYCLONE, respectively. (C) 2001 Elsevier Science B.V. All rights reserved.