Measurements of Prompt and MHD-Induced Fast Ion Loss from National Spherical Torus Experiment Plasmas

Technical Report · Tue Oct 15 00:00:00 EDT 2002

DOI:https://doi.org/10.2172/809847· OSTI ID:809847

Darrow, D S; Medley, S S; Roquemore, A L; Heidbrink, W W; Alekseyev, A; Cecil, F E; Egedal, J; Goloborod'ko, V Ya; Gorelenkov, N N; Isobe, M; Kaye, S; Miah, M; Paoletti, F; Redi, M H; Reznik, S N; Rosenberg, A; White, R; Wyatt, D; Yavorskij, V A

A range of effects may make fast ion confinement in spherical tokamaks worse than in conventional aspect ratio tokamaks. Data from neutron detectors, a neutral particle analyzer, and a fast ion loss diagnostic on the National Spherical Torus Experiment (NSTX) indicate that neutral beam ion confinement is consistent with classical expectations in quiescent plasmas, within the {approx}25% errors of measurement. However, fast ion confinement in NSTX is frequently affected by magnetohydrodynamic (MHD) activity, and the effect of MHD can be quite strong.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 809847
• Report Number(s): PPPL-3754; TRN: US0302630
• Resource Relation: Other Information: PBD: 15 Oct 2002
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ASPECT RATIO
CONFINEMENT
MAGNETOHYDRODYNAMICS
NEUTRAL PARTICLE ANALYZERS
NEUTRON DETECTORS
QUIESCENT PLASMA
NEUTRAL BEAM INJECTION
MHD INSTABILITY
NEUTRAL BEAMS
SPHERICAL TOKAMAK
NATIONAL SPHERICAL TORUS EXPERIMENT
TOKAMAKS