Spitzer or neoclassical resistivity: A comparison between measured and model poloidal field profiles on PBX-M
- Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)
Direct measurements of the radial profile of the magnetic field line pitch on PBX-M (Phys. Fluids B {bold 2}, 1271 (1990)), coupled with model predictions of these profiles allow a critical comparison with the Spitzer and neoclassical models of plasma parallel resistivity. The measurements of the magnetic field line pitch are made by motional Stark effect polarimetry, while the model profiles are determined by solving the poloidal field diffusion equation in the TRANSP transport code using measured plasma profiles and assuming either Spitzer or neoclassical resistivity. The measured field pitch profiles were available for only seven cases, and the model profiles were distinguishable from each other in only three of those cases due to finite resistive diffusion times. The data in two of these three were best matched by the Spitzer model, especially in the inner-half of the plasma. Portions of the measured pitch profiles for these two cases and the full profiles for other cases, however, departed significantly from both the Spitzer and neoclassical models, indicating a plasma resistivity profile different from either model.
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 7205659
- Journal Information:
- Physics of Fluids B; (United States), Vol. 4:3; ISSN 0899-8221
- Country of Publication:
- United States
- Language:
- English
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Spitzer or neoclassical resistivity: A comparison between measured and model poloidal field profiles on PBX-M
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Related Subjects
PDX DEVICES
NEOCLASSICAL TRANSPORT THEORY
BALLOONING INSTABILITY
CURRENT DENSITY
DIFFUSION
HYDROGEN
MAGNETIC FIELD CONFIGURATIONS
MAGNETOHYDRODYNAMICS
PLASMA CONFINEMENT
PLASMA INSTABILITY
POLARIMETRY
SPITZER THEORY
STARK EFFECT
TOKAMAK DEVICES
TOROIDAL CONFIGURATION
ANNULAR SPACE
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
CONFINEMENT
ELEMENTS
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
MECHANICS
NONMETALS
PLASMA MACROINSTABILITIES
SPACE
THERMONUCLEAR DEVICES
TRANSPORT THEORY
700330* - Plasma Kinetics
Transport
& Impurities- (1992-)
700370 - Plasma Fluid & MHD Properties- (1992-)