Error analysis in simulating interaction of fusion plasma with hot electrons
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摘要: 对惯性约束聚变(ICF)实验条件下热电子辐照聚变等离子体（DD，DT）的射程岐离和散射进行了分析。结果表明，射程岐离和散射随射程增加近似呈直线增加；射程岐离和散射大小与等离子质量有一定关系。在单能热电子入射下，散射是计算结果误差的主要来源，误差在5%以下，绝对数在数十MA。入射束流的电子完全沉积在热斑中的聚焦角度，在边沿点火方式中，氘等离子体中为20.64，氘氚等离子体中为21.8；在中心加热方式中，氘等离子体中为16.36，氘氚等离子体中为17.6，在技术上相对易于实现。Abstract: The longitudinal and lateral straggling was analyzed in the irradiation of hot electrons into DD and DT fusion plasma. The result shows that the longitudinal and lateral straggling linearly increases with increasing the penetration range which is in some relation to plasma mass. The calculated error mainly results from the lateral straggling, with the value below 5%, or millions of amperes. When the electron energy is fully deposited in the hot spot, the focusing angle is 20.64 for DD plasma and 21.8 for DT plasma in the edge-ignition mode, and is 16.36 for DD plasma and 17.6 for DT plasma in the center-ignition mode. The condition for the electronic beam focusing angle is easily achieved.
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Key words:
- hot electron /
- DT plasma /
- range straggling /
- scattering
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