Deuterium flux measurements in the edge plasmas of PLT and PDX during auxiliary heating experiments

Journal Article · Thu Apr 01 04:00:00 EST 1982 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.571550· OSTI ID:5523362

Wampler, W R; Cohen, S A; Dylla, H F; Manos, D M; Magee, C W

The flux of deuterium in the plasma edge several centimeters outside the limiter has been measured using collector probes during neutral beam heating experiments on the PDX tokamak and rf heating experiments on the PLT tokamak. The dependence of the flux on the distance from the plasma was determined, and the time dependence of the flux was measured with a time resolution of 90 ms. In PDX the deuterium flux decreases rapidly with increasing distance from the plasma. The deuterium flux increased strongly when the beams came on and decreased when they turned off. The depth distribution of the deuterium in the samples, measured using SIMS, shows that when the beams are on, about 30% of the deuterium incident on the probe is superthermal deuterium from the beams. In PLT the deuterium flux decreased only slightly with increasing distance from the plasma. The ICRH heating in PLT caused an increase of about 30% in the flux of deuterium to the samples and in the plasma density. In both machines the deuterium fluxes were fairly low (< or approx. =10/sup 16/ D/cm/sup 2/s) at the positions sampled.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 5523362
• Journal Information: J. Vac. Sci. Technol.; (United States), Journal Name: J. Vac. Sci. Technol.; (United States) Vol. 20:4; ISSN JVSTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
&amp; Production
BEAM INJECTION
BEAM INJECTION HEATING
CHEMICAL ANALYSIS
DEUTERIUM
DISTRIBUTION
DIVERTORS
HEATING
HIGH-FREQUENCY HEATING
HYDROGEN ISOTOPES
ICR HEATING
ION MICROPROBE ANALYSIS
ISOTOPES
LIGHT NUCLEI
LIMITERS
MASS SPECTROSCOPY
MICROANALYSIS
NEUTRAL ATOM BEAM INJECTION
NONDESTRUCTIVE ANALYSIS
NUCLEI
ODD-ODD NUCLEI
PDX DEVICES
PLASMA DENSITY
PLASMA HEATING
PLT DEVICES
SPATIAL DISTRIBUTION
SPECTROSCOPY
STABLE ISOTOPES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS