Computational and theoretical analysis of electron plasma cooling by resonant interaction with a microwave cavity
Computational and theoretical analysis of electron plasma cooling by resonant interaction with a microwave cavity
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电子等离子体与微波腔共振相互作用冷却的计算和理论分析
DOI：
10.1063/5.0012756
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发表时间：
2020-08
影响因子：
2.2
通讯作者：
E. Kur;Francis Robicheaux;N. Evetts;J. Fajans;A. GuerraIV;W. Hardy;E. Hunter;Z. Schroeder
中科院分区：
文献类型：
--
作者：
E. Kur;Francis Robicheaux;N. Evetts;J. Fajans;A. GuerraIV;W. Hardy;E. Hunter;Z. Schroeder
最近的实验表明，通过将等离子体放置在腔中并调节磁场使回旋加速器运动与腔模式共振，可以提高Penning-Malmberg陷阱中电子等离子体的回旋加速器冷却速率。本文用耦合振荡器模型研究了这种物理现象，并对其进行了解析和数值分析。等离子体冷却性能是通过广泛的系统参数来评估的，包括电子的数量，与局部电场的耦合，磁场梯度，以及腔和回旋加速器频率之间的失谐。对方程组进行缩放表明，该系统可以用几个关键的无量纲量很好地描述。
Recent experiments demonstrated that the cyclotron cooling rate of an electron plasma in a Penning–Malmberg trap can be increased by placing the plasma in a cavity and adjusting the magnetic field to make the cyclotron motion resonant with a cavity mode. Here this physics is studied with a coupled oscillator model and analyzed both analytically and numerically. Plasma cooling performance is evaluated over a wide range of system parameters, including the number of electrons, the coupling to the local electric field, the magnetic field gradient, and the detuning between the cavity and cyclotron frequencies. Scaling the equations shows that the system is well-described by a few key dimensionless quantities.