3D PiC code simulations for a laboratory experimental investigation of Auroral Kilometric Radiation mechanisms
3D PiC code simulations for a laboratory experimental investigation of Auroral Kilometric Radiation mechanisms
复制标题
用于极光千米辐射机制实验室实验研究的 3D PiC 代码模拟
DOI:
10.1088/0741-3335/50/12/124038
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发表时间:
2008
影响因子:
2.2
通讯作者:
Gillespie K
中科院分区:
文献类型:
--
作者:
Gillespie K
Auroral Kilometric Radiation (AKR), occurs naturally in the polar regions of the Earth's magnetosphere where electrons are accelerated by electric fields into the increasing planetary magnetic dipole. Here conservation of the magnetic moment converts axial to rotational momentum forming a horseshoe distribution in velocity phase space. This distribution is unstable to cyclotron emission with radiation emitted in the X-mode. In a scaled laboratory reproduction of this process, a 75–85 keV electron beam of 5–40 A was magnetically compressed by a system of solenoids and emissions were observed for cyclotron frequencies of 4.42 GHz and 11.7 GHz resonating with near cut-off TE 0, 1 and TE 0, 3 modes, respectively. Here we compare these measurements with numerical predictions from the 3D PiC code KARAT. The 3D simulations accurately predicted the radiation modes and frequencies produced by the experiment. The predicted conversion efficiency between electron kinetic and wave field energy of around 1% is close to the experimental measurements and broadly consistent with quasi-linear theoretical analysis and geophysical observations.
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影响因子:
3.8
作者:
K. Ronald;S. McConville;D. Speirs;A. Phelps;C. Robertson;C. Whyte;Wenlong He;K. Gillespie;A. Cross;R. Bingham
通讯作者:
R. Bingham
影响因子:
--
作者:
R. Benson
通讯作者:
R. Benson
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
A. Phelps;T. Garvey;A. S. Hasaani
通讯作者:
A. S. Hasaani
影响因子:
1.5
作者:
K. Ronald;A. Cross;A. Phelps;Wenlong He;H. Yin;S. Spark
通讯作者:
S. Spark
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