论文标题
对冲击形成与减轻冲击的调查的调查
An investigation of shock formation versus shock mitigation of colliding plasma jets
论文作者
论文摘要
这项工作研究了碰撞等离子体喷气机以了解机制的相互作用，在这种情况下，喷射合并会导致冲击形成与模式，在这种方案中，由于喷气机的无碰撞互穿，减轻了冲击形成。本研究需要动力学模型，因为流体模型总是会对等离子体喷射的碰撞产生冲击。具有一个速度尺寸的连续运动，vlasov-Maxwell-Dougherty模型用于准确捕获冲击加热，以及具有矩方程的新型耦合，以进化垂直温度以提高计算效率。结果，这种相对廉价的模拟可用于详细扫描参数空间，以预测震惊与冲击降低的制度，这对于几种融合概念（例如等离子 - jet驱动的磁持续型融合（PJMIF），高源性血浆血浆密度，高度等离子体，天文学，天文学局势和其他实验室）而言是感兴趣的。使用这种方法获得的初始结果与血浆衬里实验（PLX）的初步结果一致。
This work studies the interaction between colliding plasma jets to understand regimes in which jet merging results in shock formation versus regimes in which the shock formation is mitigated due to the collisionless interpenetration of the jets. A kinetic model is required for this study because fluid models will always produce a shock upon the collision of plasma jets. The continuum-kinetic, Vlasov-Maxwell-Dougherty model with one velocity dimension is used to accurately capture shock heating, along with a novel coupling with a moment equation to evolve perpendicular temperature for computational efficiency. As a result, this relatively inexpensive simulation can be used for detailed scans of the parameter space towards predictions of shocked versus shock-mitigated regimes, which is of interest for several fusion concepts such as plasma-jet-driven magneto-inertial fusion (PJMIF), high-energy-density plasmas, astrophysical phenomena, and other laboratory plasmas. The initial results obtained using this approach are in agreement with the preliminary outcomes of the Plasma Liner Experiment (PLX).
