RAPID TRAVERSAL OF 3/3 RADIAL RESONANCE NEAR THE CENTER OF A SECTOR FOCUSED CYCLOTRON
Technical Report
·
OSTI ID:4096802
The feasibility of overcoming axial defocusing at small radii for a three-sector magnetic field was investigated. The procedares used involved numerical construction of an average magnetic field to supplement the axial focusing in the central region, and a feasibility study of the traversal of the radial oscillation resonance necessitated by features of this average field. For the numerical calculations formulas obtained from the smooth approximation are used. The orbital properties of ions were obtained on the MISTIC computer. It was found that good axial focusing can be obtained near the center of a sector- focused cyclotron from a nonisochronous average magnetic field without excessive phase slip. Ions accelerated in the field described must traverse the 3/3 radial resonance near the center of the cyclotron. Orbital integration with a digital computer showed that a 1/2-in.-wide proton beam with an energy gain per revolution of 280 kev can be accelerated through this resonance without intolerable beam distortion. (T.R.H.)
- Research Organization:
- Michigan State Univ., East Lansing
- NSA Number:
- NSA-15-010170
- OSTI ID:
- 4096802
- Report Number(s):
- MSUCP-3
- Country of Publication:
- United States
- Language:
- English
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