Jung R, Osterholz J, Löwenbrück K, Kiselev S, Pretzler G, Pukhov A, Willi O, Kar S, Borghesi M, Nazarov W, Karsch S, Clarke R, Neely D
Heinrich-Heine-Universität Düsseldorf, Germany.
Phys Rev Lett. 2005 May 20;94(19):195001. doi: 10.1103/PhysRevLett.94.195001. Epub 2005 May 16.
The transport of an intense electron-beam produced by the Vulcan petawatt laser through dense plasmas has been studied by imaging with high resolution the optical emission due to electron transit through the rear side of coated foam targets. It is observed that the MeV-electron beam undergoes strong filamentation and the filaments organize themselves in a ringlike structure. This behavior has been modeled using particle-in-cell simulations of the laser-plasma interaction as well as of the transport of the electron beam through the preionized plasma. In the simulations the filamentary structures are reproduced and attributed to the Weibel instability.
通过对涂覆泡沫靶背面电子穿过时产生的光发射进行高分辨率成像，研究了由Vulcan拍瓦激光产生的强电子束在稠密等离子体中的传输。观察到兆电子伏电子束经历强烈的丝状化，并且这些丝状物形成环状结构。已使用激光 - 等离子体相互作用以及电子束通过预电离等离子体传输的粒子模拟对这种行为进行了建模。在模拟中，丝状结构得以再现，并归因于韦贝尔不稳定性。
