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首页> 外文期刊>Bulletin of the American Physical Society >APS -59th Annual Meeting of the APS Division of Plasma Physics - Event - Towards a better understanding of high-energy electron pitch-angle scattering by electromagnetic ion cyclotron waves.
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APS -59th Annual Meeting of the APS Division of Plasma Physics - Event - Towards a better understanding of high-energy electron pitch-angle scattering by electromagnetic ion cyclotron waves.

机译：APS-等离子体物理APS部门第59届年会-事件-更好地理解电磁离子回旋波对高能电子俯仰角的散射。

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Shear Alfven waves are a fundamental mode in magnetized plasmas.Propagating near the ion cyclotron frequency, these waves are oftentermed electromagnetic ion cyclotron (EMIC) waves and can involve multiple ion species.Near the earth, for example, thewave may interact resonantly with oxygen ions at altitudes ranging from 1000 to 2000 km.The waves may either propagate from space towards the earth (possibly involving mode conversion),or be generated by RF transmitters on the ground.These preliminary experiments are motivated by theoretical predictions [1] thatsuch waves can pitch-angle scatter relativistic electrons trapped in the earth's dipole field.EMIC waves are launched in the Large Plasma Device at UCLA's Basic Plasma Science Facility in plasmas withsingle and multiple ion species into magnetic field gradients where ion cyclotron resonanceis satisfied. We report here on the frequency and k-spectra in the critical layerand how they compare with theoretical predictions in computing an effective diffusion coefficientfor high-energy electrons. [1] B. Eliasson and K. Papadopoulos (in submission)
机译：Alfven剪切波是磁化等离子体中的基本模式，这些波在离子回旋加速器频率附近传播，通常被称为电磁离子回旋加速器（EMIC）波，可能涉及多种离子物种，例如在地球附近，该波可能与氧离子发生共振相互作用。在1000至2000 km的高空。这些波可能从太空传播到地球（可能涉及模式转换），也可能是由地面上的RF发射器产生的。这些初步实验受到理论预测的推动[1]。螺距角散射相对论电子被困在地球的偶极子场中。EMIC波在加州大学洛杉矶分校基本等离子体科学设施的大型等离子体装置中发射，等离子体中的单个和多个离子种类进入了满足离子回旋共振的磁场梯度。我们在此报告临界层的频率和k谱，以及它们如何与理论预测相比较来计算高能电子的有效扩散系数。 [1] B. Eliasson和K. Papadopoulos（提交中）

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