Measurement of the local particle diffusion coefficient in a magnetized plasma
Local impurity particle diffusion coefficients have been measured in a low temperature plasma by the injection of test particles at the center of the plasma. The injection is accomplished by a high voltage discharge between two small graphite electrodes on a probe. The probe can be located anywhere in the plasma. The diffusion is observed spectroscopically. An analysis of the spatial and temporal evolution of the CII radiation from the carbon discharge can determine the parallel and perpendicular diffusion of the impurity ions. Results with the diagnostic have been obtained in the Proto S-1/C spheromak. The measured value of the diffusion coefficient in the afterglow plasma is in good agreement with classical predictions.
- Research Organization:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 6637207
- Report Number(s):
- PPPL-2411; ON: DE87008072
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLASMA DRIFT
SPHEROMAK DEVICES
IMPURITIES
PLASMA DIAGNOSTICS
DIFFUSION
ELECTRODES
GRAPHITE
PLASMA
TEST PARTICLES
CARBON
CLOSED PLASMA DEVICES
ELEMENTAL MINERALS
ELEMENTS
MINERALS
NONMETALS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics