Sawtooth oscillations in reacting plasmas

被引：1

作者：

Haas, FA ^{[1
]}

Thyagaraja, A ^{[1
]}

机构：

[1] UKAEA,CULHAM LAB,FUS PHYS DEPT,ABINGDON OX14 3DB,OXON,ENGLAND

来源：

FUSION TECHNOLOGY | 1997年 / 31卷 / 02期

关键词：

sawteeth; reacting plasmas; ash removal;

D O I：

10.13182/FST97-A30818

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

An important issue in fusion power plant design involves the effect of sawteeth on power transients and ash removal. A model was previously presented for sawtooth oscillations in tokamaks based on a thermal instability mechanism mediated by turbulence in the q < 1 core. This model has been validated against current machines such as the Joint European Torus (JET) and the Tokamak Experiment for Technology-Oriented Research (TEXTOR). Here, it is adapted to include effects of alpha particle heating in a reacting plasma. The goal is to study the interaction between fusion reactions and the sawtooth turbulence dynamics. The alpha particle heating rate function is sensitive to temperature variations and could possibly result in a thermal instability mechanism for amplifying sawtooth temperature fluctuations under typical conditions. Taking International Thermonuclear Experimental Reactor (ITER)-like conditions as an example, calculations are performed to illustrate this generic behavior. These conditions suggest that while the sawteeth are effective in helium ash removal from the a < 1 region, they can produce significant spikes in the alpha power.

引用

页码：159 / 168

页数：10

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