Impurity transport in ohmic- and neutral-beam-heated TFTR discharges

Conference · Wed Oct 01 04:00:00 EDT 1986

OSTI ID:7182532

Stratton, B C; Cohen, S A; Boody, F P; Bush, C E; Ellis, R III; Fonck, R J; Fredrickson, E; Grek, B; Groebner, R J; Hill, K W

Impurity transport has been studied in ohmic- and neutral-beam-heated TFTR discharges by observation and numerical modeling of time evolutions of emissions from germanium injected using the laser-blowoff method. VUV spectral lines, the total radiated power, and soft x-ray intensities are compared with code predictions in which the impurity flux is assumed to have diffusive and convective terms. In plasmas with I/sub p/=1.4 MA and anti n/sub e/approx. = 2.5 x 10/sup 13/ cm/sup -3/, little difference in transport between ohmic and beam-heated discharges is observed. At I/sub p/=0.7 MA and anti n/sub e/approx. = 1.0 x 10/sup 13/ cm/sup -3/, a three-fold increase in the diffusion coefficient is found during beam heating.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.; Oak Ridge National Lab., TN (USA); General Atomics Co., San Diego, CA (USA); Massachusetts Inst. of Tech., Cambridge (USA). Francis Bitter National Magnet Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 7182532
• Report Number(s): PPPL-2393; CONF-860522-21; ON: DE87003071
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
BEAM INJECTION
CHARGED PARTICLES
ELECTRIC HEATING
ELECTROMAGNETIC RADIATION
GERMANIUM IONS
HEATING
IMPURITIES
IONIZING RADIATIONS
IONS
JOULE HEATING
NEUTRAL ATOM BEAM INJECTION
PLASMA HEATING
RADIATIONS
RESISTANCE HEATING
SOFT X RADIATION
TFTR TOKAMAK
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
TRANSPORT THEORY
X RADIATION