Broadband single-shot electron spectrometer for GeV-class laser-plasma-based accelerators.
Broadband single-shot electron spectrometer for GeV-class laser-plasma-based accelerators.
复制标题
用于 GeV 级激光等离子体加速器的宽带单次电子能谱仪。
DOI：
10.1063/1.2929672
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
W. Leemans
中科院分区：
文献类型：
--
作者：
K. Nakamura;W. Wan;N. Ybarrolaza;D. Syversrud;J. Wallig;W. Leemans
基于激光等离子体的加速器可以在宽的能量范围内和/或以大的动量扩散提供电子。电子束能量分布可以通过精确控制激光和等离子体特性来控制，并且已经观察到能量范围从大约0.5到1000 MeV的束。在单次发射中测量这些能量分布需要使用具有大动量接受度的诊断仪，理想情况下，需要足够的分辨率来精确测量窄能量扩散光束。这样一个宽带单次电子磁谱仪GeV级激光等离子体加速器已在劳伦斯伯克利国家实验室开发。详细描述的设计概念和硬件，以及光谱仪的性能评估。光谱仪覆盖的电子束能量从0.01到1.1 GeV的肆虐在一个单一的镜头，并使激光性能的同时测量在出口处的加速器通过使用一个足够大的极隙。基于测量的场图和三阶输运分析，在整个能量范围内实现了几个μ m级分辨率和绝对能量的确定。基于激光等离子体的加速器实验证明了光谱仪作为诊断的能力及其测量宽带电子源的适用性。
Laser-plasma-based accelerators can provide electrons over a broad energy range and/or with large momentum spread. The electron beam energy distribution can be controlled via accurate control of laser and plasma properties, and beams with energies ranging from approximately 0.5 to 1000 MeV have been observed. Measuring these energy distributions in a single shot requires the use of a diagnostic with large momentum acceptance and, ideally, sufficient resolution to accurately measure narrow energy spread beams. Such a broadband single-shot electron magnetic spectrometer for GeV-class laser-plasma-based accelerators has been developed at Lawrence Berkeley National Laboratory. Detailed descriptions of the design concept and hardware are presented, as well as a performance evaluation of the spectrometer. The spectrometer covered electron beam energies raging from 0.01 to 1.1 GeV in a single shot, and enabled the simultaneous measurement of the laser properties at the exit of the accelerator through the use of a sufficiently large pole gap. Based on measured field maps and third-order transport analysis, a few percent-level resolution and determination of the absolute energy were achieved over the entire energy range. Laser-plasma-based accelerator experiments demonstrated the capability of the spectrometer as a diagnostic and its suitability for measuring broadband electron sources.
影响因子：
64.8
作者：
Faure, J;Glinec, Y;Malka, V
通讯作者：
Malka, V