论文标题
Legolas：具有粘度和霍尔电流的磁流失动力学光谱
Legolas: magnetohydrodynamic spectroscopy with viscosity and Hall current
论文作者
论文摘要
等离子体中的许多线性稳定性方面都受到基本理想磁流失动力学（MHD）描述以外的非理想效应的严重影响。在这里，现代开源MHD光谱码Legolas具有粘度，并在一系列严格的历史和最新发现中突出显示并标记了大厅电流。粘度扩展在带有泰勒 - 库特流动和具有撕裂模式的粘性等离子体板中的圆柱设置中证明。对于大厅的延伸，我们展示了完整的本本特征光谱与无限同质介质中的分析分散关系如何相关。我们量化了HARRIS电流表中的HALL项对电阻撕裂模式的影响，包括可压缩性的效果，这在早期的研究中不存在。此外，我们说明了Legolas如何模仿不可压缩的极限，以与文献结果相比。除了发布的发现之外，我们强调了计算完整本本特征光谱的重要性，以及如何通过可压缩性修改频谱的元素。这些扩展允许对与正在进行的发电机实验，原球磁盘或磁重新连接相关的Legolas进行未来的稳定研究。
Many linear stability aspects in plasmas are heavily influenced by non-ideal effects beyond the basic ideal magnetohydrodynamics (MHD) description. Here, the extension of the modern open-source MHD spectroscopy code Legolas with viscosity and the Hall current is highlighted and benchmarked on a stringent set of historic and recent findings. The viscosity extension is demonstrated in a cylindrical setup featuring Taylor-Couette flow and in a viscoresistive plasma slab with a tearing mode. For the Hall extension, we show how the full eigenmode spectrum relates to the analytic dispersion relation in an infinite homogeneous medium. We quantify the Hall term influence on the resistive tearing mode in a Harris current sheet, including the effect of compressibility, which is absent in earlier studies. Furthermore, we illustrate how Legolas mimics the incompressible limit easily to compare to literature results. Going beyond published findings, we emphasise the importance of computing the full eigenmode spectrum, and how elements of the spectrum are modified by compressibility. These extensions allow for future stability studies with Legolas that are relevant to ongoing dynamo experiments, protoplanetary disks, or magnetic reconnection.
