Self-consistent analysis of the power-energy balance and determination of the runaway electron characteristics in the ISTTOK discharges
Self-consistent analysis of the power-energy balance and determination of the runaway electron characteristics in the ISTTOK discharges
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DOI：
10.1088/0741-3335/44/9/316
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发表时间：
2002-09
影响因子：
2.2
通讯作者：
V. Plyusnin;J. Cabral;H. Figueiredo;I. Nedzelskii;C. Varandas
中科院分区：
文献类型：
--
作者：
V. Plyusnin;J. Cabral;H. Figueiredo;I. Nedzelskii;C. Varandas
ISTTOK 托卡马克中高纵向电场（E0≥1 V m-1）下的低等离子体密度放电揭示了失控（RA）生成过程的特征。在 RA 方案开始时检测到软 X 射线发射的增加。在实验中观察到等离子体参数的松弛，这是由 RA 电子驱动的不稳定性的典型卫星效应。在一些排放中，不稳定造成了轻微的干扰。基于测量的等离子体参数（包括 RA 生成过程），使用等离子体传输的自洽 0 维计算，同时确定 RA 电子特性和重建电子温度时间演化。评估了 RA 电子的动能和限制时间。开发的建模程序应用于研究大规模托卡马克破坏中热淬火时可能的 RA 生成过程。
Low plasma density discharges at high longitudinal electric fields (E0≥1 V m-1) in the ISTTOK tokamak revealed characteristic features for the runaway (RA) generation process. The increase in soft x-ray emission was detected at the onset of the RA regime. The relaxations of the plasma parameters, a typical satellite effect of the instability driven by the RA electrons, were observed in experiments. In some discharges instability caused minor disruptions. Simultaneous determination of the RA electron characteristics and reconstruction of the electron temperature temporal evolution has been performed using self-consistent 0-D calculations of the plasma transport on the basis of the measured plasma parameters with the inclusion of the RA generation process. The kinetic energy as well as the confinement time of RA electrons was evaluated. The modelling procedure developed was applied in the investigation of a possible RA generation process at the thermal quench in large-scale tokamak disruption.