论文标题
太阳爆发研究的激光 - 血浆相互作用实验
A laser-plasma interaction experiment for solar burst studies
论文作者
论文摘要
提出了一个基于激光 - 血浆相互作用的新实验平台，以探索行星际无线电排放起源的波耦合的基本过程。它应用于在太阳爆发期间观察到的等离子频率（$2Ω_p$）的电磁（EM）发射的研究，并认为是由两个Langmuir Waves（LWS）的合并产生的。在行星际介质中，第一个LW被电子束激发，而第二个LW是由Langmuir波的静电衰减产生的。在本实验中，通过等离子体传播的能量激光代替电子束会激发主要的LW，其特性接近近地轨道。 $2Ω_p$的EM辐射以不同的角度观察到。它的强度，光谱演化和极化证实了LW钙化方案。
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.
