Effect of neutral particles on the energy confinement of spheromaks

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859583· OSTI ID:6980785

Mayo, R M; Choi, C K ^[1]; Levinton, F M; Janos, A C; Yamada, M ^[2]

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1. Purdue University, West Lafayette, Indiana 47907 (USA)
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (USA)

Neutral density profiles are calculated for plasma and edge conditions consistent with those of the S-1 spheromak ({ital Plasma} {ital Physics} {ital and} {ital Controlled} {ital Nuclear} {ital Fusion} {ital Research}, 1984 (IAEA, Vienna, 1985), Vol. 2, p. 535). Multiple generation charge exchange is the dominant transport mechanism for edge neutrals to the plasma center. Central neutral densities may be as high as 1%--5% of the electron density. The high-edge neutral population makes it possible to explain the value and scaling of resistivity in decaying spheromaks. Large neutral components also provide an ion energy-loss mechanism through charge exchange.

• OSTI ID: 6980785
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 2:1; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANNULAR SPACE
ATOM TRANSPORT
CHARGE EXCHANGE
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
COLLISIONS
CONFIGURATION
CONFINEMENT
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
END EFFECTS
ENERGY LOSSES
ION COLLISIONS
LOSSES
MAGNETIC FIELD CONFIGURATIONS
NEUTRAL-PARTICLE TRANSPORT
PLASMA
PLASMA CONFINEMENT
RADIATION TRANSPORT
SCALING LAWS
SPACE
SPHEROMAK DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOROIDAL CONFIGURATION