Resonant extraction from three-sector low-spiral cyclotrons

Abstract

Results of MSU studies of resonant extraction systems for a 40 MeV variable energy, multi-particle cyclotron are reviewed. Initial sections give a qualitative account of extraction principles. Following this, results of numerical studies of both radial and axial motion under many varying resonant conditions are considered and, for comparison, also a corresponding non-resonant condition. Final sections briefly review (a) initial design studies relative to deflector hardware, (b) performance estimates for the system, and (c) preliminary studies of techniques for achieving improved duty cycle.