Critical evaluation of the neoclassical model for the equilibrium electrostatic field in a tokamak

被引：0
作者：
Johnson, Robert W. [1 ]
机构：
[1] Alphawave Res, Atlanta, GA 30238 USA
来源：
MECHANICS RESEARCH COMMUNICATIONS | 2011年 / 38卷 / 02期
关键词：
Tokamaks; Spherical tokamaks; Magnetohydrodynamics Theory; Design; Computerized simulation; AMPLITUDE SOLITARY WAVES; ELECTROMAGNETIC STRESS TENSOR; RADIAL ELECTRIC-FIELD; PLASMA; ROTATION;
D O I：
10.1016/j.mechrescom.2011.01.007
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The neoclassical prescription to use an equation of motion to determine the electrostatic field within a tokamak plasma is fraught with difficulties. Herein we examine two popular expressions for the equilibrium electrostatic field so determined and show that one fails to withstand a formal scrutiny thereof while the other fails to respect the vector nature of the diamagnetic current. Reconsideration of the justification for the presence of the equilibrium electrostatic field indicates that no field is needed for a neutral plasma when considering the net bound current defined as the curl of the magnetization. With any shift in the toroidal magnetic flux distribution, a dynamic electric field is generated with both radial and poloidal components, providing an alternate explanation for any measurements thereof. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：146 / 151
页数：6
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