Local carbon diffusion coefficient measurement in the S-1 spheromak

Technical Report · Sat Oct 01 00:00:00 EDT 1988

DOI:https://doi.org/10.2172/6585289· OSTI ID:6585289

Mayo, R M; Levinton, F M; Meyerhofer, D D; Chu, T K; Paul, S F; Yamada, M

The local carbon diffusion coefficient was measured in the S - 1 spheromak by detecting the radial spread of injected carbon impurity. The radial impurity density profile is determined by the balance of ionization and diffusion. Using measured local electron temperature T/sub e/ and density n/sub e/, the ionization rate is determined from which the particle diffusion coefficient is inferred. The results found in this work are consistent with Bohm diffusion. The absolute magnitude of D/sub /perpendicular// was determined to be (4/approximately/6) /times/ D/sub Bohm/. 25 refs., 13 figs., 2 tabs.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6585289
• Report Number(s): PPPL-2560; ON: DE89004621; TRN: 89-001850
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
SPHEROMAK DEVICES
DIFFUSION
ANALYTICAL SOLUTION
BOHM CRITERION
CARBON
ELECTRON DENSITY
ELECTRON TEMPERATURE
EXPERIMENTAL DATA
IMPURITIES
IONIZATION
NEUTRAL ATOM BEAM INJECTION
PLASMA
PLASMA DIAGNOSTICS
PLASMA INSTABILITY
BEAM INJECTION
CLOSED PLASMA DEVICES
DATA
ELEMENTS
INFORMATION
INSTABILITY
NONMETALS
NUMERICAL DATA
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700103* - Fusion Energy- Plasma Research- Kinetics