Physical Process and Characteristic Parameters in Magnetized Liner Inertial Fusion
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摘要: 磁化套筒惯性聚变(MagLIF)结合了传统磁约束聚变(MCF)与惯性约束聚变(ICF)的优势，理论上在有限的驱动能力下可以有效降低聚变实现的难度，具有极大的应用潜力。基于一维集成化物理模型编写了数值模拟程序，以ZR装置典型驱动能力27 MA为出发点，以时间演化为顺序，通过数值模拟系统性地总结分析了典型负载参数下MagLIF构型初始化、加速内爆及迟滞3个关键过程中重要特征参量的分布及演化情况。数值模拟结果有助于理解MagLIF构型从预加热经由燃料压缩到最终发生聚变这一快速而复杂的过程，从而为建立相应的物理图像和认知提供了重要支撑，与传统ICF典型参数的对比也体现了该构型的优势所在，为后续研究奠定了基础。
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关键词:
- 磁化套筒惯性聚变；惯性约束聚变 /
- 物理过程 /
- 特征参量
Abstract: Magnetized liner inertial fusion (MagLIF) has combined the advantages of the conventional magnetic confinement fusion (MCF) and inertial confinement fusion (ICF), which could reduce the barrier of controlled fusion and has great potential and feasibility for future applications. In this work, a conventional MagLIF configuration is calculated with 27 MA driving current based on one-dimensional simulation code MIST, distributions and evolvement of characteristic parameters (such as density, pressure, temperature and fusion product) are acquired and demonstrated during three stages of MagLIF process, including initialization, implosion and stagnation. The simulation results provide significant data and support for the assessment and analysis of MagLIF process, which would be helpful to understand how MagLIF behaves from preheat through compression into fusion. Comparison of key parameters between MagLIF and traditional ICF also be shown in this work. -
图 4 将燃料平均预加热至250 eV示意图及温度分布
Figure 4. Method and temperature distribution of uniform preheating until 250 eV
图 5 其他预加热方式下燃料的温度分布
Figure 5. Temperature distribution of other preheat temperature methods
图 7 预加热后不同时刻燃料中的压力分布
Figure 7. Distributions of pressure in fuel at different time short after preheat
图 8 内爆压缩阶段典型参量的分布曲线
Figure 8. Distributions of characteristic parameters in fuel at different times during implosion stage
图 9 迟滞阶段示意图和燃料半径随时间演化
Figure 9. Schematic of stagnation and fuel radius evolving with time
图 10 聚变产额、内能及聚变反应功率随时间演化
Figure 10. Fuel internal energy, fusion yield and power evolving with time
图 11 迟滞时刻的典型物理参量分布
Figure 11. Distributions of characteristic parameters in fuel at stagnation times
图 12 磁化参数和燃料温度随时间的演化
Figure 12. Schematic of BR and fuel temperature evolving with time
表 1 MagLIF与传统激光ICF典型参数对比
Table 1. Comparison of key parameters between MagLIF and traditional ICF
Configuration Driving pressure/TPa Implosion velocity/(km·s−1) Compression ratio Volume ratio Traditional ICF(spherical) 14−16 350−380 35−45 43 000−91 000 MagLIF(cylindrical) About 160 79 14.7 210 Fuel$\;\rho $R/(g·cm−2) Hall parameter BR/(T·cm−1) Burning time/ns Ion temperature > 0.3 0.15−0.20 > 4 About 0.009 400 > 45 3.0 > 7 
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