Kiselev S, Pukhov A, Kostyukov I
Institut fur Theoretische Physik I, Heinrich-Heine-Universitat Duesseldorf, 40225 Duesseldorf, Germany.
Phys Rev Lett. 2004 Sep 24;93(13):135004. doi: 10.1103/PhysRevLett.93.135004. Epub 2004 Sep 23.
We show that a laser wake field in the "bubble" regime [Appl. Phys. B 74, 355 (2002)]], works as a compact high-brightness source of x-rays. The self-trapped relativistic electrons make betatron oscillations in the transverse fields of the bubble and emit a bright broadband x-ray radiation with a maximum about 50 keV. The emission is confined to a small angle of about 0.1 rad. In addition, we make simulations of x-ray generation by an external 28.5 GeV electron bunch injected into the bubble. gamma quanta with up to GeV energies are observed in the simulation in good agreement with analytical results. The energy conversion is efficient, leading to a significant stopping of the electron bunch over 5 mm interaction distance.
我们表明，处于“泡”模式[《应用物理B》74, 355 (2002)]的激光尾场可作为一种紧凑的高亮度X射线源。自俘获相对论电子在泡的横向场中做贝塔束振荡，并发射出峰值约为50 keV的明亮宽带X射线辐射。该辐射被限制在约0.1弧度的小角度范围内。此外，我们对注入泡中的外部28.5 GeV电子束产生X射线进行了模拟。在模拟中观测到了能量高达GeV的伽马量子，与分析结果吻合良好。能量转换效率很高，导致电子束在5毫米的相互作用距离上有显著的减速。
