An ion gun and detector system for ion drift surface studies on toroidal devices

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1146400· OSTI ID:6700101

Sasser, G E; Knowlton, S F; Gandy, R F; Lin, H; Thomas, E E; Owens, M A ^[1]

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

An ion gun and detector system have been designed and tested to study energetic ion trajectories and single-particle confinement in the vacuum field and low-density plasma of the Compact Auburn Torsatron (CAT). Thermionic Li[sup +] and Mg[sup +] sources are used. The gun positioning is capable of two degrees of freedom, allowing selection of the pitch angle and initial flux surface. The injection energy of the ions is variable from 5 to 100 eV, allowing investigation of the orbits of particles with large Larmor radii. The ion currents of typical magnitude [ital I]=10 nA are detected with a movable paddle probe making use of a boxcar-averaging technique. The detected ion trajectories are compared with the predicted trajectories from a guiding center code that makes use of a detailed model of the CAT magnetic configuration. The ion gun and detector system will be used to study the effect of magnetic islands on energetic ion trajectories.

• DOE Contract Number: FG05-85ER53192
• OSTI ID: 6700101
• Journal Information: Review of Scientific Instruments; (United States), Vol. 66:1; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
ION BEAM INJECTION
TORSATRON STELLARATORS
EV RANGE
GUIDING-CENTER APPROXIMATION
LITHIUM IONS
MAGNESIUM IONS
MAGNETIC ISLANDS
TRAJECTORIES
BEAM INJECTION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
ENERGY RANGE
IONS
MAGNETIC FIELD CONFIGURATIONS
STELLARATORS
THERMONUCLEAR DEVICES
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)