Numerical and Theoretical Investigations of Non-Neutral and Positron-Electron Plasma Dynamics

磁表面对非中性等离子体的约束，如托卡马克或仿星器的磁表面，是等离子体研究的一个新领域。本研究的重点是发展从单组分到准中性等离子体的磁面约束理论，这在一定程度上是由电子-正电子等离子体的约束所驱动的。当磁表面上的等离子体远离电荷中性时，产生的强静电势为少数种提供了良好的约束。这使得磁性表面（仿星器）特别适合于限制正电子等离子体。正电子等离子体，也被称为对等离子体，由于其完美的质量对称和完美的电荷反对称，与电子-离子等离子体有着独特的区别。部分中和等离子体和对等离子体与聚变等离子体物理有关。目前最先进的聚变等离子体模拟代码，如GS2，可以对成对等离子体实验进行基准测试。这些代码应该能够准确地预测磁性表面结构中等离子体对的物理性质，因为质量对称实际上简化了这个问题。

The confinement of non-neutral plasmas by magnetic surfaces, such as those of a tokamak or a stellarator, is a new area of plasma research. This research focuses on the development of the theory of confinement by magnetic surfaces of plasmas that range from single component to quasi-neutral, which is in part motivated by the confinement of electron-positron plasmas. The strong electrostatic potential that arises when plasmas on magnetic surfaces are far from charge neutrality provides excellent confinement for the minority species. This makes magnetic surfaces (a stellarator) particularly suited for confining positron-electron plasmas. Positron-electron plasmas, also known as pair plasmas, are uniquely different from electron-ion plasmas due to the perfect mass symmetry and perfect charge antisymmetry. Partly neutralized and pair plasmas are relevant to fusion plasma physics. State of the art fusion plasma simulation codes, such as GS2, can be benchmarked against a pair-plasma experiment. The codes should be able to accurately predict the physics of pair plasmas in a magnetic surface configuration, since the mass symmetry actually simplifies the problem.