Halo formation induced by density nonuniformities in intense ion beams

Journal Article · Thu Jun 01 00:00:00 EDT 1995 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.51.R5216· OSTI ID:63650

Qian, Q; Davidson, R C ^[1]; Chen, C ^[2]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)
2. Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

A test-particle model is used to investigate the charged-particle dynamics in an intense matched ion beam with nonuniform density profile propagating through an alternating-gradient quadrupole magnetic field in the space-charge-dominated regime. It is shown that self-field nonlinearities due to transverse nonuniformities in the beam density not only can result in chaotic ion motion but also can cause halo formation. For heavy-ion fusion applications, these results indicate that accurate density profile control is critical in preventing heavy-ion beams from developing halos.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 63650
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 51, Issue 6; Other Information: PBD: Jun 1995
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
66 PHYSICS
ION BEAMS
BEAM DYNAMICS
HEAVY ION ACCELERATORS
MAGNETIC FIELDS
QUADRUPOLAR CONFIGURATIONS
TEST PARTICLES
DISTRIBUTION FUNCTIONS
INERTIAL CONFINEMENT