Open AccessPLASMA TEMPERATURE PROFILE OF D-T BURNING FOR THE BOHM TYPE
Author(s) -
Gong Xue-yu,
Lin Qiu,
Bowen Shi,
Long Yong-Xing
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.2266
Subject(s) - thermal diffusivity , plasma , atomic physics , electron temperature , materials science , thermal conductivity , diffusion , tokamak , particle (ecology) , ion , electron , physics , thermodynamics , nuclear physics , geology , oceanography , quantum mechanics
By adopting the Bohm type thermal diffusivity coefficient which is applicable to JET,considering the effect of the α particle anomalous diffusion and the dynamic feedback heating,and using the energy transport equations of electron and ion,the plasma temperature profiles of deuterium-tritium (D-T) burning are studied under a given plasma density profile.Some results are obtained:the Bohm type thermal conductivity increases from the center of plasma to the boundary;in order to sustain D-T burning,the dynamic feedback heating power must be present,otherwise,the burning would be extinguished;the power coupling coefficient of α particle with the bulk plasma is less than one in the central part of the plasma,and much larger than one in the outer part;the stronger the α particle anomalous duffusion,the higher the central ion temperature.This is due to the smaller thermal diffusivity coefficient in the central part and the dynamic heating power to increase because of the lower central electron temperature;the energy amplifier factor Q under the Bohm type is smaller than under other types,therefore,the prospect of the Tokamak reactor operation model based on Bohm type is pessimistic.