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Title: Passing particle toroidal precession induced by electric field in a tokamak

Characteristics of a rotation of passing particles in a tokamak with radial electric field are calculated. The expression for time-averaged toroidal velocity of the passing particle induced by the electric field is derived. The electric-field-induced additive to the toroidal velocity of the passing particle appears to be much smaller than the velocity of the electric drift calculated for the poloidal magnetic field typical for the trapped particle. This quantity can even have the different sign depending on the azimuthal position of the particle starting point. The unified approach for the calculation of the bounce period and of the time-averaged toroidal velocity of both trapped and passing particles in the whole volume of plasma column is presented. The results are obtained analytically and are confirmed by 3D numerical calculations of the trajectories of charged particles.
Authors:
 [1] ; ;  [1] ;  [2]
  1. Peoples' Friendship University of Russia, Ordzhonikidze St. 3, Moscow 117198 (Russian Federation)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
22224184
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHARGED PARTICLES; CHARGED-PARTICLE TRANSPORT; ELECTRIC FIELDS; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC FIELDS; NUMERICAL ANALYSIS; PLASMA; PLASMA CONFINEMENT; ROTATING PLASMA; TOKAMAK DEVICES; TRAPPING