惯性约束聚变的电磁屏蔽仿真

Electromagnetic Shielding Simulation of Inertial Confinement Fusion

惯性约束核聚变的激光靶耦合过程产生的电磁脉冲会强烈干扰实验诊断设备的正常运行。为此,用B-dot天线采集了神光Ⅱ装置近靶点处激光与靶耦合产生的电磁脉冲信号,简单分析了6个打靶发次的电磁脉冲实验数据。并提出了加装铜制材料作为屏蔽装置以削弱电磁脉冲干扰的设计。借助ANSYS多物理场仿真软件对加装屏蔽板后不同电压下的电势分布进行了仿真,仿真结果表明,铜屏蔽板对220 V/380 V电压下的激励均具有良好的屏蔽效果,电势大小均降低到15 V以下。

The electromagnetic pulse generated by the laser-target coupling process of inertial confinement nuclear fusion will strongly interfere with the normal operation of the experimental diagnostic equipment.Therefore,the electromagnetic pulse signals generated by the laser-target coupling near the target point of the Shenguang II device were collected by using the B-dot antenna,and the electromagnetic pulse experimental data of six target firing times were analyzed briefly.A design of adding copper material as a shielding device to weaken the electromagnetic pulse interference was proposed.With the help of ANSYS multi-physics field simulation software,the potential distribution under different voltages after adding a shielding plate was simulated.The simulation results show that the copper shielding plate has good shielding effect on the excitation under 220 V/380 V voltage,and the potential size is reduced to less than 15 V.