论文标题
在辐射反应中以直接激光加速为主的缩放定律
Scaling laws for direct laser acceleration in a radiation-reaction dominated regime
论文作者
论文摘要
我们在超临界等离子体通道中研究电子加速度，该通道被超强大的激光脉冲（$ a_0> 100> 100 $或$ i> 10^{22}}〜\ mathrm {w/cm^2} $）。在此制度中，辐射反应显着改变了电子动力学。这不仅对最大可达到的电子能量有效，还对激光场中Betatron运动与电子振荡之间的相匹配过程产生影响。我们的研究包括分析描述，测试粒子计算和二维粒子中的模拟。我们在0.5毫米长的通道内显示了单级电子加速度到多GEV能量，并提供了如何使用最佳初始配置获得10 GEV以上的能量。我们以一种明确的分析缩放定律形式介绍了所需条件，该法律可用于计划未来的电子加速实验。
We study electron acceleration within a sub-critical plasma channel irradiated by an ultra-intense laser pulse ($a_0>100$ or $I>10^{22}~\mathrm{W/cm^2}$). In this regime, radiation reaction significantly alters the electron dynamics. This has an effect not only on the maximum attainable electron energy but also on the phase-matching process between betatron motion and electron oscillations in the laser field. Our study encompasses analytical description, test-particle calculations and 2-dimensional particle-in-cell simulations. We show single-stage electron acceleration to multi-GeV energies within a 0.5 mm-long channel and provide guidelines how to obtain energies beyond 10 GeV using optimal initial configurations. We present the required conditions in a form of explicit analytical scaling laws that can be applied to plan the future electron acceleration experiments.
