Generation of stable, low-divergence electron beams by laser-wakefield acceleration in a steady-state-flow gas cell
Generation of stable, low-divergence electron beams by laser-wakefield acceleration in a steady-state-flow gas cell
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DOI：
10.1103/physrevlett.101.085002
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发表时间：
2008-08-22
影响因子：
8.6
通讯作者：
Karsch, S.
中科院分区：
文献类型：
--
作者：
Osterhoff, J.;Popp, A.;Karsch, S.
激光驱动的，quasimonoenergetic电子束的能量高达200兆电子伏的类似已被观察到从稳态流动的气体细胞。这些光束在2.1 +/- 0.5 mrad FWHM的低发散锥内发射，由于相互作用体积内的高度可再现的气体密度分布，这些光束在能量（2.5% rms）、指向（1.4 mrad rms）和电荷（16% rms）方面显示出前所未有的拍摄到拍摄的稳定性。在这种类型的气室中的激光尾流场加速提供了一种简单而可靠的相对论电子源，适用于诸如产生极紫外波荡器辐射的应用。
Laser-driven, quasimonoenergetic electron beams of up to similar to 200 MeV in energy have been observed from steady-state-flow gas cells. These beams emitted within a low-divergence cone of 2.1 +/- 0.5 mrad FWHM display unprecedented shot-to-shot stability in energy (2.5% rms), pointing (1.4 mrad rms), and charge (16% rms) owing to a highly reproducible gas-density profile within the interaction volume. Laser-wakefield acceleration in gas cells of this type provides a simple and reliable source of relativistic electrons suitable for applications such as the production of extreme-ultraviolet undulator radiation.