等离子体枪中气流碰撞对ELM复制的影响
Effects of Flow Collisionality on ELM Replication in Plasma Guns
摘要：
由于等离子体扰动引起的第一壁材料的退化严重限制了聚变反应堆的寿命和寿命。在各种扰动中，I型边缘局域模（ELM）由于其在下一步聚变反应堆中的预期热负荷和相对频率而特别提出了显著的设计挑战。等离子体枪装置已被广泛用于在实验室中复制ELM条件，然而，其特征在于密度更高，温度更低，因此比聚变条件下预期的更高的流动碰撞性。这项工作提出了实验可视化，表明强烈的冲击形式的枪设备在空间和时间尺度上烧蚀动力学之前。这些测量用于验证详细的磁流体动力学模拟，捕获生产的等离子体射流和屏蔽效应碰撞发挥粒子运输到材料表面。模拟结果表明，等离子体枪的自屏蔽效应减少了高达90%的自由流动的热通量，并进一步减少入射粒子的动能撞击材料表面。这些模拟进行了一系列的枪设备的操作条件下，并提供了一个讨论，关于如何现有的实验测量时，可以解释外推到融合条件。
英文摘要：
Degradation of first wall materials due to plasma disturbances severely limit both the lifetime and longevity of fusion reactors. Among the various kinds of disturbances, type I edge localized modes (ELMs) in particular present significant design challenges due to their expected heat loading and relative frequency in next step fusion reactors. Plasma gun devices have been used extensively to replicate ELM conditions in the laboratory, however feature higher density, lower temperatures, and thus higher flow collisionality than those expected in fusion conditions. This work presents experimental visualizations that indicate strong shocks form in gun devices over spatial and temporal scales that precede ablation dynamics. These measurements are used to validate detailed magnetohydrodynamic simulations that capture the production of plasma jets and the shielding effect collisionality plays in particle transport to material surfaces. Simulations show that self-shielding effects in plasma guns reduce the free streaming heat flux by up to 90% and further reduce the incoming particle kinetic energy impinging on material surfaces. These simulations are performed over a range of operating conditions for gun devices and a discussion is provided regarding how existing experimental measurements can be interpreted when extrapolating to fusion conditions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
