Edge measurements during ICRF (ion cyclotron range of frequency) heating on the PLT (Princeton Large Torus) tokamak

Technical Report · Sat Apr 01 00:00:00 EST 1989

DOI:https://doi.org/10.2172/6211995· OSTI ID:6211995

Lehrman, I S; Colestock, P L; McNeill, D H; Greene, G J; Bernabei, S; Hosea, J C; Ono, M; Shohet, J L; Wilson, J R

Edge measurements have been conducted on the PLT tokamak under a variety of operating conditions in order to ascertain the relevant processes at work in coupling rf power to plasmas. The edge density is found to increase significantly with the application of ICRF, and electron heating occurs in the vicinity of the Faraday shield surrounding the antenna. Spectroscopic measurements indicate that the energized antenna is a significant particle source. The relative increase of metallic impurities was found to be /approximately/2.7 times larger than the corresponding increase in deuterium. In addition, the relative increase of deuterium and impurities was /approximately/3--4 times greater at the energized antenna than at other locations around the torus. Model calculations show that for deuterium released from the Faraday shield, the D/sub ..cap alpha../ emission is localized radially to a region within 4 cm of the antenna. A correlation was found between the edge density and the D/sub ..cap alpha../ intensity that justifies its use as a measure of the particle source rate. 26 refs., 14 figs.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6211995
• Report Number(s): PPPL-2607; ON: DE89010298
• 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
PLT DEVICES
ICR HEATING
DEUTERIUM
IMPURITIES
PLASMA DENSITY
RF SYSTEMS
TEMPERATURE MEASUREMENT
HEATING
HIGH-FREQUENCY HEATING
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-ODD NUCLEI
PLASMA HEATING
STABLE ISOTOPES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production