Beam driven instabilities in magnetized plasmas

磁化等离子体中的束驱动不稳定性

• 批准号: EP/D036763/1
• 负责人: Alan Phelps
• 金额: $ 37.67万
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD036763%2F1
• 关键词: Beam; driven; instabilities; magnetized; plasmas

Electromagnetic radiation is another, broader, name for light, encompassing radio waves through to gamma rays. This proposal intends to investigate the ability of an electron beam gyrating in a fixed magnetic field to interact with an electromagnetic wave, in the microwave part of the spectrum. In certain conditions this interaction can be arranged so that the electrons slow down, and the energy they lose is conserved by an increase in the energy of the wave. This process is effectively LASER action. In particular the project will consider an electron beam where some electrons are very nearly travelling along the magnetic field lines and others are gyrating nearly perpendicularly to it. A new theoretical idea has been proposed as a result of astronomical observations which expects especially high growth rates to occur from this type of electron beam and potentially efficient conversion of the electron energy to wave energy. To evaluate this potential, and the validity of the theoretical idea, the project will conduct an experiment where such a beam will be produced by magnetic compression and the emissions from the beam will be observed for different values of the magnetic field and radiation field distributions. Measurements of the beam current, voltage position and velocity will be compared to the measurements of the amplitude and frequency of the microwave emissions. Theoretical research will also be undertaken to ensure the expected behaviour is compared accurately with the actually realisable experimental geometry. This combined approach of theoretical and experimental investigation will allow the project to compare the experimental results with the predictions of the theoretical model and also with the output of computational simulations, thereby establishing its validity and potential for applications.

电磁辐射是光的另一个更广泛的名称，包括无线电波到伽马射线。这个提议旨在研究在固定磁场中旋转的电子束与频谱的微波部分中的电磁波相互作用的能力。在某些条件下，这种相互作用可以被安排成使电子慢下来，并且它们失去的能量通过波能量的增加而守恒。这个过程实际上是激光作用。特别是，该项目将考虑一个电子束，其中一些电子是非常接近沿着磁场线和其他回旋几乎垂直于它。一个新的理论思想已被提出作为天文观测的结果，预计特别高的增长率发生从这种类型的电子束和潜在的有效转换的电子能量波能量。为了评估这种潜力以及理论想法的有效性，该项目将进行一项实验，通过磁压缩产生这种光束，并观察不同磁场和辐射场分布值的光束发射。束电流、电压位置和速度的测量值将与微波发射的振幅和频率的测量值进行比较。还将进行理论研究，以确保将预期的行为与实际可实现的实验几何形状进行准确比较。这种理论和实验研究相结合的方法将使该项目能够将实验结果与理论模型的预测以及计算模拟的输出进行比较，从而确定其有效性和应用潜力。

项目成果

Cyclotron maser radiation from inhomogeneous plasmas

• DOI: 10.1063/1.3551697
• 发表时间: 2011-02
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: R. A. Cairns;I. Vorgul;R. Bingham;K. Ronald;D. Speirs;S. McConville;K. Gillespie;R. Bryson;A. Phelps;B. Kellett;A. Cross;C. Roberston;C. Whyte;Wenlong He

X-ray emission as a diagnostic from pseudospark-sourced electron beams

• DOI: 10.1016/j.nimb.2014.06.008
• 发表时间: 2014-09-15
• 期刊: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
• 影响因子: 1.3
• 作者: Bowes, D.;Yin, H.;Li, D.
• 通讯作者: Li, D.

Laboratory astrophysics: Investigation of planetary and astrophysical maser emission

• DOI: 10.1007/s11214-013-9963-z
• 发表时间: 2013-03
• 期刊: Space Science Reviews
• 影响因子: 10.3
• 作者: R. Bingham;R. Bingham;D. Speirs;B. Kellett;I. Vorgul;S. McConville;R. A. Cairns;A. Cross

Oversized W-band 2D Periodic Lattice Oscillator

超大 W 波段 2D 周期晶格振荡器

• DOI: 10.1109/ivec.2019.8745064
• 发表时间: 2019
• 作者: Cross A

Visualization of a Pseudospark-Sourced Electron Beam

• DOI: 10.1109/tps.2014.2300691
• 发表时间: 2014-10
• 期刊: IEEE Transactions on Plasma Science
• 影响因子: 1.5
• 作者: D. Bowes;H. Yin;Wenlong He;K. Ronald;A. Phelps;Defeng Chen;Peng Zhang;Xiao-dong Chen;Daohui Li;A. Cross