Linear gyrokinetic simulations of magnetically confined electron–positron plasmas are performed for the first time in the geometry and parameter regimes likely to be relevant for upcoming laboratory experiments. In such plasmas, the density will be sufficiently small as to render the plasma effectively collisionless. The magnetic field will be very large, meaning that the Debye length will exceed the gyroradius by a few orders of magnitude. We show the results of linear simulations in flux tubes close to the current carrying ring and also in the bulk of the plasma, demonstrating the existence of entropy modes and interchange modes in pair plasmas. We study linear stability and show that in the relevant configurations, almost complete linear stability is attainable in large swathes of parameter space.

中文翻译：

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闭合场线系统中正负电子等离子体的线性陀螺动力学

首次在可能与即将进行的实验室实验相关的几何和参数方案中对磁约束的电子 - 正电子等离子体进行线性回转动力学模拟。在这样的等离子体中，密度将足够小以使等离子体有效地无碰撞。磁场将非常大，这意味着德拜长度将超过回转半径几个数量级。我们展示了靠近载流环的通量管以及等离子体主体的线性模拟结果，证明了对等离子体中熵模式和交换模式的存在。我们研究了线性稳定性并表明在相关配置中，在大范围的参数空间中可以获得几乎完全的线性稳定性。