Analytical Prediction of Ion Stripping Extraction From Isochronous Cyclotrons

Abstract

Accelerated ion beams are often extracted from a cyclotron by stripping some of ion's electrons at the end of the acceleration process. Stripping extraction system is commonly designed and optimized using computer simulations of beam dynamics at a later stage of a cyclotron project. However, minor changes in the distance between the magnet poles are proven to cause large displacements of the optimal position of high-energy transport line. It is shown that simple analytical formulas give good prediction of the position and direction of beam exit after stripping extraction and are useful tool for preliminary facility layout planning.