Nonlocal diffusivity: Impact on transient transport studies
- 1. Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, I-20133 Milano (Italy)
- 2. Dipartimento di Fisica, Universita degli Studi di Milano, I-20133 Milano (Italy)
Description
Nonlocal effects are observed in a number of transient transport studies in tokamaks and stellarators. In this paper some consequences of nonlocality are discussed on the basis of a heuristic model for the electron heat diffusivity (χe). The main consequence is the presence of an additional (''missing'') heating power term (pχ) in the heat transport equation. Suitable combinations of pχ and modulated power profiles should give rise to detectable effects in modulated heating experiments such as those planned on the Frascati Tokamak Upgrade (FTU) [R. Andreani et al., in Fusion Technology, Proceedings of the 16th Symposium, London, 1990, edited by B. E. Keen, M. Huguet, and R. Hemsworth (Elsevier Science, Amsterdam, 1991), Vol. 1, p. 218]. Failure to properly include pχ effects (if present) can lead to an overestimate of χe from heat wave propagation analysis. copyright 1995 American Institute of Physics
Additional details
Publishing Information
- Journal Title
- Physics of Plasmas
- Journal Volume
- 2
- Journal Issue
- 12
- Journal Page Range
- p. 4589-4595.
- ISSN
- 1070-664X
- CODEN
- PHPAEN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 27024287
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- HEAT FLUX; HEAT TRANSFER; LASER-PRODUCED PLASMA; PLASMA HEATING; STELLARATORS; TEXT DEVICES; TFTR TOKAMAK; THERMAL DIFFUSIVITY; TOKAMAK DEVICES; TRANSIENTS; TRANSPORT THEORY
- Descriptors DEC
- CLOSED PLASMA DEVICES; ENERGY TRANSFER; HEATING; PHYSICAL PROPERTIES; PLASMA; THERMODYNAMIC PROPERTIES; THERMONUCLEAR DEVICES