聚变等离子体中超热α粒子的Fokker Planck动力学模拟
Fokker Planck kinetic modeling of suprathermal alpha-particles in a fusion plasma
摘要：
本文提出了一个描述惯性聚变靶氘氚燃料点火和燃烧的离子动力学模型。底层的物理模型的分析，使我们能够开发有效的数值方法来模拟聚变反应产物（α粒子）在动力学水平的创建，运输和碰撞弛豫。一个两个能量尺度的方法导致一个自洽的模型之间的耦合超热α粒子和热散装的内爆等离子体。这种方法提供了一个精确的数值处理的能量沉积和传输过程涉及超热粒子。这里提出的数值工具对已知的分析结果进行了验证。这使我们能够研究离子动力学效应对惯性约束聚变点火和热核燃烧物理的潜在作用。
英文摘要：
We present an ion kinetic model describing the ignition and burn of the deuterium-tritium fuel of inertial fusion targets. The analysis of the underlying physical model enables us to develop efficient numerical methods to simulate the creation, transport and collisional relaxation of fusion reaction products (alpha-particles) at a kinetic level. A two-energy-scale approach leads to a self-consistent modeling of the coupling between suprathermal alpha-particles and the thermal bulk of the imploding plasma. This method provides an accurate numerical treatment of energy deposition and transport processes involving suprathermal particles. The numerical tools presented here are validated against known analytical results. This enables us to investigate the potential role of ion kinetic effects on the physics of ignition and thermonuclear burn in inertial confinement fusion schemes.
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