Comment on ``Scalings for radiation from plasma bubbles'' [Phys. Plasmas 17, 056708 (2010)]
Comment on ``Scalings for radiation from plasma bubbles'' [Phys. Plasmas 17, 056708 (2010)]
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对“等离子体气泡辐射的缩放”的评论[物理学。
DOI：
10.1063/1.3566012
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发表时间：
2011
影响因子：
2.2
通讯作者：
V. Malka
中科院分区：
文献类型：
--
作者：
S. Corde;A. Stordeur;V. Malka
Thomas最近导出了等离子体气泡中加速电子产生的x射线辐射的标度定律，以及背景电子自注入气泡的阈值[a]。g·r·托马斯，物理学家等离子体学报[j]。为了得到这个阈值，在气泡模型的框架内研究了一个测试电子的运动方程，其中气泡由规定的电磁场描述，并且具有完美的球形。作者证实，任何形式为x ' 2/γp2+y ' 2=R2的椭圆轨迹都是运动方程（在气泡框架中）的解，其近似为py ' 2/px ' 2⪡1。此外，他强调他的结果与Kostyukov等人的工作不同。Rev. Lett. 103, 175003(2009)]，并解释了Kostyukov-Nerush-Pukhov-Seredov （KNPS）犯下的错误。在这篇评论中，我们表明，基于与Thomas的分析工作相同的方程的数值积分轨迹，会导致完全不同的结果……
Thomas has recently derived scaling laws for x-ray radiation from electrons accelerated in plasma bubbles, as well as a threshold for the self-injection of background electrons into the bubble [A. G. R. Thomas, Phys. Plasmas 17, 056708 (2010)]. To obtain this threshold, the equations of motion for a test electron are studied within the frame of the bubble model, where the bubble is described by prescribed electromagnetic fields and has a perfectly spherical shape. The author affirms that any elliptical trajectory of the form x′2/γp2+y′2=R2 is solution of the equations of motion (in the bubble frame), within the approximation py′2/px′2⪡1. In addition, he highlights that his result is different from the work of Kostyukov et al. [Phys. Rev. Lett. 103, 175003 (2009)], and explains the error committed by Kostyukov–Nerush–Pukhov–Seredov (KNPS). In this comment, we show that numerically integrated trajectories, based on the same equations than the analytical work of Thomas, lead to a completely different result ...