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arXiv 2109.04866physics.plasm-phphysics.acc-ph
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尾流场加速的辐射反应主导区

Radiation reaction-dominated regime of wakefield acceleration

A. A. Golovanov, E. N. Nerush, I. Yu. Kostyukov

摘要:

本文研究了电子在等离子体尾流场中的横向振荡所产生的辐射-反作用力对电子加速的影响。辐射反应的经典和强量子电动力学(QED)的限制。对于恒定的加速力,我们表明,振幅的振荡的QED参数$χ$在辐射占主导地位的制度,达到平衡值仅由加速场的大小,而平均过感应加速振荡辐射反作用力饱和的值小于加速力,因此是无法防止无限加速。我们找到的参数的电子束和等离子体加速器,达到这样的制度是可能的。我们还研究了在加速过程中的失相和相应的加速力的变化的影响,并得出结论,辐射主导的制度是实现在单级加速与缓慢的失相(通常对应于聚束驱动的等离子体加速器)和多级加速与快速的失相(对应于使用激光驱动的加速器)的情况下。

英文摘要:

We study electron acceleration in a plasma wakefield under the influence of the radiation-reaction force caused by the transverse betatron oscillations of the electron in the wakefield. Both the classical and the strong quantum-electrodynamic (QED) limits of the radiation reaction are considered. For the constant accelerating force, we show that the amplitude of the oscillations of the QED parameter $χ$ in the radiation-dominated regime reaches the equilibrium value determined only by the magnitude of the accelerating field, while the averaged over betatron oscillations radiation reaction force saturates at the value smaller than the accelerating force and thus is incapable of preventing infinite acceleration. We find the parameters of the electron bunch and the plasma accelerator for which reaching such a regime is possible. We also study effects of the dephasing and the corresponding change of accelerating force over the course of acceleration and conclude that the radiation-dominated regime is realized both in cases of single-stage acceleration with slow dephasing (usually corresponding to bunch-driven plasma accelerators) and multi-stage acceleration with fast dephasing (corresponding to the use of laser-driven accelerators).

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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