Plasma-materials interactions during rf experiments in tokamaks

Technical Report · Sat Sep 01 00:00:00 EDT 1984

DOI:https://doi.org/10.2172/6535817· OSTI ID:6535817

Cohen, S A; Bernabei, S; Budny, R; Chu, T K; Colestock, P; Hinnov, E; Hooke, W; Hosea, J; Hwang, D; Jobes, F

Plasma-materials interactions studied in recent ICRF heating and lower hybrid current drive experiments are reviewed. The microscopic processes responsible for impurity generation are discussed. In ICRF experiments, improvements in machine operation and in antenna and feedthrough design have allowed efficient plasma heating at RF powers up to 3 MW. No significant loss of energy from the plasma core due to impurity radiation occurs. Lower hybrid current drive results in the generation and maintenance of hundreds of kiloamperes of plasma current carried by suprathermal electrons. The loss of these electrons and their role in impurity generation are assessed. Methods to avoid this problem are evaluated.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6535817
• Report Number(s): PPPL-2124; ON: DE85002116
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TOKAMAK DEVICES
IMPURITIES
CURRENT-DRIVE HEATING
ICR HEATING
INTERACTIONS
LOWER HYBRID HEATING
PLASMA
THERMONUCLEAR REACTOR MATERIALS
CLOSED PLASMA DEVICES
ELECTRIC HEATING
HEATING
HIGH-FREQUENCY HEATING
JOULE HEATING
MATERIALS
PLASMA HEATING
RESISTANCE HEATING
THERMONUCLEAR DEVICES
700104* - Fusion Energy- Plasma Research- Plasma Kinetics-Experimental- (-1987)