磁化套筒惯性聚变初步探索研究与实验可行性分析

磁化套筒惯性聚变(MagLIF)构型可充分利用现有大型脉冲功率驱动装置,如聚龙一号等。基于磁流体力学方程组和1∶1比例氘氚(DT)混合燃料聚变模型,开发了零维MagLIF数值模拟程序并进行了初步探索研究。计算结果表明初始负载参数(如轴向磁场强度,预加热温度、时刻,负载半径等)与聚变产额之间有着密切的联系,在给定条件下,可依据计算给出的定性关系进行负载优化设计。值得注意的是,根据计算结果,即使在理想条件下,氘氚燃料要实现能量收支平衡,则驱动器的电流必须大于21.2 MA。这意味着聚龙一号装置(10 MA)无法开展集成化的MagLIF实验,进一步的校验计算验证了上述观点,并在此基础上提出铝套筒分解实验的建议和负载设计参数。所取得的计算结果有利于加深对MagLIF套筒压缩阶段物理过程的认知和理解。

Preliminary exploration of MagLIF concept and feasibility analysis on PTS facility

Magnetized Liner Inertial Fusion (MagLIF) concept has promising potentials for future energy source (Phys.Plasmas, 2014, 21:072711), it is widely applicable to large-scale pulsed power generators such as the Primary Test Stand (PTS) facility (10 MA, 100 ns). In this context, we’ve developed a zero-dimensional (0D) MagLIF simulation code basing on magneto-hydrodynamic (MHD) equations and Deuterium-Tritium (DT) fusion models. Relationships between fusion products and initial setups (magnetic field B_z0, preheat temperature T₀ and so on) are explored using this code, results show optimal parameters existing under given inputs, which are very helpful for future experimental designs. Specifically, according to our simulations, critical driving current (＞21.2 MA) is essential for fuel (50∶50 DT) energy to reach breakeven, which infers that PTS facility may not be suitable for integrated MagLIF experiments. Series of calculations are performed to confirm this inference, and more practical aluminum liner experiments are proposed and designed.