Particle and energy transport studies on TFTR and implications for helium ash in future fusion devices
Particle and energy transport in tokamak plasmas have long been subjects of vigorous investigation. Present-day measurement techniques permit radially resolved studies of the transport of electron perturbations, low- and high-Z impurities, and energy. In addition, developments in transport theory provide tools that can be brought to bear on transport issues. Here, we examine local particle transport measurements of electrons, fully-stripped thermal helium, and helium-like iron in balanced-injection L-mode and enhanced confinement deuterium plasmas on TFTR of the same plasma current, toroidal field, and auxiliary heating power. He[sup 2[plus]] and Fe[sup 24[plus]] transport has been studied with charge exchange recombination spectroscopy, while electron transport has been studied by analyzing the perturbed electron flux following the same helium puff used for the He[sup 2[plus]] studies. By examining the electron and He[sup 2[plus]] responses following the same gas puff in the same plasmas, an unambiguous comparison of the transport of the two species has been made. The local energy transport has been examined with power balance analysis, allowing for comparisons to the local thermal fluxes. Some particle and energy transport results from the Supershot have been compared to a transport model based on a quasilinear picture of electrostatic toroidal drift-type microinstabilities. Finally, implications for future fusion reactors of the observed correlation between thermal transport and helium particle transport is discussed.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 6817202
- Report Number(s):
- PPPL-CFP-2764; IAEA-CN-56/A-7-16; CONF-9209290-3; ON: DE93006154
- Resource Relation:
- Conference: 14. international conference on plasma physics and controlled nuclear fusion research, Wurzburg (Germany), 30 Sep - 7 Oct 1992
- Country of Publication:
- United States
- Language:
- English
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Particle and energy transport studies on TFTR and implications for helium ash in future fusion devices
Particle and energy transport studies on TFTR and implications for helium ash in future fusion devices
Related Subjects
TFTR TOKAMAK
TRANSPORT THEORY
CHARGE EXCHANGE
CHARGED-PARTICLE TRANSPORT
ELECTRON TEMPERATURE
HELIUM ASH
ION TEMPERATURE
PLASMA MICROINSTABILITIES
RECOMBINATION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
HELIUM IONS
INSTABILITY
IONS
PLASMA INSTABILITY
RADIATION TRANSPORT
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700330* - Plasma Kinetics
Transport
& Impurities- (1992-)