Demonstration of a Narrow Energy Spread, ∼0.5 GeV Electron Beam from a Two-Stage Laser Wakefield Accelerator
Demonstration of a Narrow Energy Spread, ∼0.5 GeV Electron Beam from a Two-Stage Laser Wakefield Accelerator
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DOI：
10.1103/physrevlett.107.045001
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发表时间：
2011-07-18
影响因子：
8.6
通讯作者：
Froula, D. H.
中科院分区：
文献类型：
--
作者：
Pollock, B. B.;Clayton, C. E.;Froula, D. H.
电子的激光韦克菲尔德加速对于产生GeV级的超紧凑级、用于诸如X射线自由电子激光器和高能对撞机的高质量电子束具有很大的希望。超高强度激光脉冲可以在几十个真空衍射长度上被相对论等离子体波（尾流）自引导，即使在低密度下也可以使用电离诱导注入将电荷注入尾流中，从而在厘米级低密度等离子体中提供> 1GeV的能量。通过将电子注入限制到明显的短区域，即注入器级，产生具有相对大的能量扩展的高能电子束（100 MeV的量级）。然后，这些电子中的一些被第二更长的加速器级进一步加速，这将它们的能量增加到类似于0.5GeV，同时将相对能量扩散减少到
Laser wakefield acceleration of electrons holds great promise for producing ultracompact stages of GeV scale, high-quality electron beams for applications such as x-ray free electron lasers and high-energy colliders. Ultrahigh intensity laser pulses can be self-guided by relativistic plasma waves (the wake) over tens of vacuum diffraction lengths, to give >1 GeV energy in centimeter-scale low density plasmas using ionization-induced injection to inject charge into the wake even at low densities. By restricting electron injection to a distinct short region, the injector stage, energetic electron beams (of the order of 100 MeV) with a relatively large energy spread are generated. Some of these electrons are then further accelerated by a second, longer accelerator stage, which increases their energy to similar to 0.5 GeV while reducing the relative energy spread to