Runaway electron distributions and their stability with respect to the anomalous Doppler resonance

Technical Report · Sun Jun 01 00:00:00 EDT 1986

OSTI ID:5103272

Fuchs, V; Shoucri, M; Teichmann, J; Bers, A

The stability of non-relativistic runaway electron distributions with respect to the anomalous Doppler resonance is examined in a range of parameters of interest to tokamaks, i.e., for Y identical to ..omega../sub pe//..cap omega../sub ce/ less than or equal to 2 and for ohmic electric fields epsilon identical to E/E/sub c/ less than or equal to 0.1. Distribution functions are calculated numerically within a region up to 35 v/sub e/ (thermal velocities) using a finite-element 2-D Fokker-Planck code. Alternatively, an analytic approximation for the runaway distribution function is used, valid beyond the critical velocity v/sub c/ approx. = v/sub e/ (E/sub c//E)/sup 1/2/. Stability thresholds in (..omega.., k/sub parallel/) - space are then determined.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA). Plasma Fusion Center; Institut de Recherche d'Hydro-Quebec, Varennes (Canada). Projet Tokamak
• DOE Contract Number: AC02-78ET51013
• OSTI ID: 5103272
• Report Number(s): DOE/ET/51013-187; PFC/RR-86-16; ON: DE87000629
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
RUNAWAY ELECTRONS
ANALYTICAL SOLUTION
TOKAMAK DEVICES
DISTRIBUTION FUNCTIONS
DOPPLER EFFECT
ELECTRON DENSITY
FINITE ELEMENT METHOD
FOKKER-PLANCK EQUATION
RESONANCE
STABILITY
CLOSED PLASMA DEVICES
DIFFERENTIAL EQUATIONS
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FUNCTIONS
LEPTONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
THERMONUCLEAR DEVICES
700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)