Electron beam measurements for a laboratory simulation of auroral kilometric radiation
Electron beam measurements for a laboratory simulation of auroral kilometric radiation
复制标题
用于极光千米辐射实验室模拟的电子束测量
DOI：
10.1088/0963-0252/17/3/035011
复制
发表时间：
2008
影响因子：
3.8
通讯作者：
R. Bingham
中科院分区：
文献类型：
--
作者：
K. Ronald;S. McConville;D. Speirs;A. Phelps;C. Robertson;C. Whyte;Wenlong He;K. Gillespie;A. Cross;R. Bingham
在地球极磁层的局部耗尽等离子体区域，X模式产生了有效的（101%）电子回旋射电辐射。这些发射通常被称为极光千米辐射。两个电子群体存在的旋转动能有助于这种效果，向下传播的极光电子通量获得横向动量由于磁矩守恒，因为它经历了一个增加的磁场和这个通量的镜像分量。本文演示了生产的电子束具有受控的速度传播的实验中使用的调查在地球上的电子通量的可用自由能。该实验被调整到微波频率，并使用电子枪将电子束注入一个受控区域，该区域的磁场由一组重现磁层情况的磁层产生。结果的测量二极管电压，束电流作为磁镜比的函数和线密度与电子俯仰角的估计与形成的马蹄形速度分布一致，并展示控制的电子分布在速度空间中。
Efficient (∼1%) electron cyclotron radio emissions are produced in the X-mode from regions of locally depleted plasma in the Earth's polar magnetosphere. These emissions are commonly referred to as auroral kilometric radiation. Two populations of electrons exist with rotational kinetic energy to contribute to this effect, the downward propagating auroral electron flux which acquires transverse momentum due to conservation of the magnetic moment as it experiences an increasing magnetic field and the mirrored component of this flux. This paper demonstrates the production of an electron beam having a controlled velocity spread for use in an experiment to investigate the available free energy in the earthbound electron flux. The experiment was scaled to microwave frequencies and used an electron gun to inject an electron beam into a controlled region of increasing magnetic field produced by a set of solenoids reproducing the magnetospheric situation. Results are presented of the measurements of diode voltage, beam current as a function of magnetic mirror ratio and estimates of the line density versus electron pitch angle consistent with the formation of a horseshoe velocity distribution and demonstrating control of the electron distribution in velocity space.
影响因子：
2.2
作者：
D. Speirs;S. McConville;K. Gillespie;K. Ronald;A. Phelps;A. Cross;R. Bingham;C. Robertson;C. Whyte;I. Vorgul;R. A. Cairns;B. Kellett
通讯作者：
D. Speirs;S. McConville;K. Gillespie;K. Ronald;A. Phelps;A. Cross;R. Bingham;C. Robertson;C. Whyte;I. Vorgul;R. A. Cairns;B. Kellett