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arXiv 1708.04511physics.plasm-ph
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laser -电子束碰撞辐射反应的量子效应特征

Signatures of quantum effects on radiation reaction in laser -- electron-beam collisions

C. P. Ridgers, T. G. Blackburn, D. Del Sorbo, L. E. Bradley, C. D. Baird, S. P. D. Mangles, P. McKenna, M. Marklund, C. D. Murphy, A. G. R. Thomas

摘要:

本文研究了~GeV电子束与高强度(> 3 × 10 ~(20)W/cm ~ 2)激光脉冲碰撞中辐射反应的两个量子效应特征。我们指出,电子束平均能量的降低可以用来测量同步辐射的Gaunt因子g。本文导出了电子束能量方差在量子区的演化方程,即量子效率参数η> 0.1。我们表明,方差的演变可以被用来作为一个直接测量的辐射反应的量子随机性,并确定参数制度,这是可观察的。例如,一个GeV电子束与强度为10^21 W/cm ^2的激光脉冲碰撞后,其能谱的标准偏差会增加25%。因此,这种影响应该是可以测量的使用目前的高强度激光系统。

英文摘要:

Two signatures of quantum effects on radiation reaction in the collision of a ~GeV electron-beam with a high-intensity (>3x10^20W/cm^2) laser-pulse have been considered. We show that the decrease in the average energy of the electron-beam may be used to measure the Gaunt factor g for synchrotron emission. We derive an equation for the evolution of the variance in the energy of the electron-beam in the quantum regime, i.e. quantum efficiency parameter eta > 0.1$. We show that the evolution of the variance may be used as a direct measure of the quantum stochasticity of the radiation reaction and determine the parameter regime where this is observable. For example, stochastic emission results in a 25% increase in the standard deviation of the energy spectrum of a GeV electron beam, 1 fs after it collides with a laser pulse of intensity 10^21 W/cm^2. This effect should therefore be measurable using current high-intensity laser systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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