Mapping the X-Ray Emission Region in a Laser-Plasma Accelerator
Mapping the X-Ray Emission Region in a Laser-Plasma Accelerator
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DOI：
10.1103/physrevlett.107.215004
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发表时间：
2011-11-18
影响因子：
8.6
通讯作者：
Malka, V.
中科院分区：
文献类型：
--
作者：
Corde, S.;Thaury, C.;Malka, V.
激光-等离子体加速器中的X射线辐射是研究相对论性激光-等离子体相互作用的有力工具。它示出在这里，电子感应加速器的X射线辐射的映射可以从X射线束轮廓时，孔掩模被定位在刚刚超出的发射区域的端部。等离子体密度的影响的位置和纵向轮廓的X射线发射的影响进行了研究，并比较粒子在细胞模拟。X射线发射位置和长度的测量提供了对相互作用的动力学的洞察，包括电子自注入区域、可能的多次注入以及电子束驱动的韦克菲尔德的作用。
The x-ray emission in laser-plasma accelerators can be a powerful tool to understand the physics of relativistic laser-plasma interaction. It is shown here that the mapping of betatron x-ray radiation can be obtained from the x-ray beam profile when an aperture mask is positioned just beyond the end of the emission region. The influence of the plasma density on the position and the longitudinal profile of the x-ray emission is investigated and compared to particle-in-cell simulations. The measurement of the x-ray emission position and length provides insight on the dynamics of the interaction, including the electron self-injection region, possible multiple injection, and the role of the electron beam driven wakefield.