Observation of Weak Impact of a Stochastic Magnetic Field on Fast-Ion Confinement

Journal Article · Fri Sep 16 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.125001· OSTI ID:20699440

Fiksel, G; Hudson, B; Hartog, D.J. den; Magee, R M; O'Connell, R; Prager, S C; Beklemishev, A D; Davydenko, V I; Ivanov, A A; Tsidulko, Yu A ^[1]

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1. Department of Physics, University of Wisconsin-Madison and Center for Magnetic Self Organization in Laboratory and Astrophysical Plasmas, Madison, Wisconsin 53706 (United States)

Fast ions are observed to be very well confined in the Madison Symmetric Torus reversed field pinch despite the presence of stochastic magnetic field. The fast-ion energy loss is consistent with the classical slowing down rate, and their confinement time is longer than expected by stochastic estimates. Fast-ion confinement is measured from the decay of d-d neutrons following a short pulse of a 20 keV atomic deuterium beam. Ion confinement agrees with computation of particle trajectories in the stochastic magnetic field, and is understood through consideration of ion guiding center islands.

• OSTI ID: 20699440
• Journal Information: Physical Review Letters, Vol. 95, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.95.125001; (c) 2005 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
CHARGED-PARTICLE TRANSPORT
CONFINEMENT
CONFINEMENT TIME
DEUTERIUM
ENERGY LOSSES
IONS
KEV RANGE 10-100
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
NEUTRONS
PLASMA
PLASMA DIAGNOSTICS
PULSES
REVERSE-FIELD PINCH
SLOWING-DOWN
STOCHASTIC PROCESSES
TRAJECTORIES