Determination of electron and ion thermal conductivities by analysis of Alcator-A profile data

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864141· OSTI ID:6362485

Liewer, P C; Pfeiffer, W; Waltz, R E

Profile data from the Alcator-A tokamak are analyzed using the onetwo transport code to study thermal conductivities and power balance. It is found that the observed central ion temperatures can be explained by assuming an ion thermal conductivity equal to the neoclassical value as calculated recently by Bolton and Ware. For low density, n-bar = 1 x 10/sup 14/ cm/sup -3/, the possible anomaly in the ion conductivity is small: +- 30% of the Bolton--Ware value. The anomalous electron thermal conductivity as deduced from the profile data is = approx. =2.5( +- 1.5) x 10/sup 17/ cm/sup -1/ sec/sup -1/. The power balance study shows that at low densities, electron energy losses from radiation and thermal conduction are equally important, and both are larger than the exchanges loss to the ions. At higher densities, n-bar> or =2 x 10/sup 14/ cm/sup -3/, electron energy losses by thermal conduction and exchange are equally important, and both are larger than the radiation loss. Convective losses, as calculated from measured particle confinement times, are negligible for all densities analyzed.

• Research Organization: Department of Applied Physics, California Institute of Technology, Pasadena, California 91125
• DOE Contract Number: AM03-76SF00767
• OSTI ID: 6362485
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 26:2; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED PLASMA DEVICES
DATA
ELECTRON TEMPERATURE
ENERGY LOSSES
INFORMATION
ION TEMPERATURE
LOSSES
PHYSICAL PROPERTIES
PLASMA
POWER
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT THEORY