受激电子声波散射的观测
Observation of stimulated electron-acoustic-wave scattering.
作者信息
Montgomery D S, Focia R J, Rose H A, Russell D A, Cobble J A, Fernández J C, Johnson R P
机构信息
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
出版信息
Phys Rev Lett. 2001 Oct 8;87(15):155001. doi: 10.1103/PhysRevLett.87.155001. Epub 2001 Sep 24.
A diffraction-limited laser interacts with a plasma whose conditions are uniform on the scale of the focused laser spot. Two distinct, narrow waves are observed in the backscattered spectrum with phase velocities of v(phi)/v(e) = 1.4+/-0.08 and 4.2+/-0.1, where v(e) is the electron thermal speed. The high-velocity wave is ordinary stimulated Raman scattering (SRS) from a Langmuir wave. The low-velocity wave corresponds to stimulated scattering from an electron-acoustic wave (SEAS), and implies strong electron trapping. Previous SRS data from low-density plasmas are reinterpreted in terms of SEAS.
一个受衍射限制的激光与一种等离子体相互作用，该等离子体的条件在聚焦激光光斑尺度上是均匀的。在背向散射光谱中观察到两个不同的窄波，其相速度为v(φ)/v(e)=1.4±0.08和4.2±0.1，其中v(e)是电子热速度。高速波是来自朗缪尔波的普通受激拉曼散射（SRS）。低速波对应于来自电子声波（SEAS）的受激散射，这意味着存在强烈的电子俘获。以前来自低密度等离子体的SRS数据根据SEAS进行了重新解释。
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