Fundamental Limit of Nonscaling Fixed-Field Alternating-Gradient Accelerators

Journal Article · Fri Sep 08 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.104801· OSTI ID:20860791

Lee, S Y ^[1]

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1. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)

Systematic nonlinear space-charge resonances may cause substantial emittance growth in the nonscaling fixed-field alternating-gradient (FFAG) accelerators. To avoid systematic nonlinear space-charge resonances, the phase advance of each nonscaling FFAG cell must avoid {pi}/2 and {pi}/3. Using multiparticle numerical simulations, we empirically obtain a minimum tune ramp rate vs the systematic 4th order space-charge resonance strength. We also find that the emittance growth obeys a simple scaling property when the betatron tunes cross the linear half-integer and sum resonances.

• OSTI ID: 20860791
• Journal Information: Physical Review Letters, Vol. 97, Issue 10; Other Information: DOI: 10.1103/PhysRevLett.97.104801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
43 PARTICLE ACCELERATORS
BETATRONS
NONLINEAR PROBLEMS
RESONANCE
SIMULATION
SPACE CHARGE