Effects of applied rotating magnetic perturbations on ion drift orbits in the Compact Auburn Torsatron

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872127· OSTI ID:459796

Pritchard, D C; Gandy, R F; Hanson, J D; Knowlton, S F; Lin, H; Sasser, G E; Thomas, E Jr; Cooney, J ^[1]

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1. Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)

Ion drift surfaces in the presence of applied rotating magnetic perturbations in the Compact Auburn Torsatron (CAT) [Fusion Technol. {bold 18}, 281 (1990)] have been studied. A compact, monoenergetic ion gun was used to launch a continuous beam of {sup 6}Li{sup +} ions in the vacuum magnetic fields of the CAT. The ions are detected on a paddle probe that is swept though a poloidal cross section of the torsatron. The applied magnetic perturbation was produced using helical magnetic perturbation coils capable of generating rotating magnetic islands. Using a fixed energy ion beam the effects of constant frequency perturbations on ion drift orbits were studied as a function of the direction of rotation, amplitude, and frequency of the perturbation. A drift Hamiltonian model was developed to simulate ion trajectories in the presence of constant frequency rotating islands. The results of this experiment agree well with the predictions of the Hamiltonian model. Preliminary results of ion orbit modification by swept-frequency, rotating magnetic perturbations are also presented. {copyright} {ital 1997 American Institute of Physics.}

• DOE Contract Number: FG05-85ER53192
• OSTI ID: 459796
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
BEAM-PLASMA SYSTEMS
CHARGED-PARTICLE TRANSPORT
HAMILTONIANS
ION BEAMS
ION DRIFT
LITHIUM IONS
MAGNETIC FIELDS
MODE LOCKING
ORBITS
PERTURBATION THEORY
PLASMA DRIFT
ROTATION
TORSATRON STELLARATORS
plasma probes
plasma toroidal confinement
plasma transport processes