Laser-Plasma Interaction Experiment for Solar Burst Studies.
Laser-Plasma Interaction Experiment for Solar Burst Studies.
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用于太阳爆发研究的激光-等离子体相互作用实验。
DOI：
10.1103/physrevlett.124.135001
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发表时间：
2020
影响因子：
8.6
通讯作者：
C. Riconda
中科院分区：
文献类型：
--
作者：
J. Marquès;C. Briand;François Amiranoff;S. Depierreux;M. Grech;L. Lancia;F. Pérez;A. Sgattoni;A. Sgattoni;Tommaso Vinci;C. Riconda
提出了一种基于激光-等离子体相互作用的新的实验平台，以探索行星际射电辐射起源处的波耦合基本过程。它被用于研究太阳爆发期间观测到的等离子体频率（2ω p）的两倍的电磁辐射，并被认为是两个朗缪尔波（LW）合并的结果。在行星际介质中，第一个LW由电子束激发，而第二个LW由静电衰减的朗缪尔波产生。在本实验中，而不是电子束，高能激光传播通过等离子体激发的主要LW，与那些在近地轨道上的特性接近。在不同角度观测到2ω p处的电磁辐射。它的强度，光谱演变，和偏振确认LW聚结的情况。
A new experimental platform based on laser-plasma interaction is proposed to explore the fundamental processes of wave coupling at the origin of interplanetary radio emissions. It is applied to the study of electromagnetic (EM) emission at twice the plasma frequency (2ω_{p}) observed during solar bursts and thought to result from the coalescence of two Langmuir waves (LWs). In the interplanetary medium, the first LW is excited by electron beams, while the second is generated by electrostatic decay of Langmuir waves. In the present experiment, instead of an electron beam, an energetic laser propagating through a plasma excites the primary LW, with characteristics close to those at near-Earth orbit. The EM radiation at 2ω_{p} is observed at different angles. Its intensity, spectral evolution, and polarization confirm the LW-coalescence scenario.