Radiating electron source generation in ultraintense laser-foil interactions
Radiating electron source generation in ultraintense laser-foil interactions
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DOI：
10.1063/1.4960682
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发表时间：
2016-08
影响因子：
2.2
通讯作者：
R. Capdessus;M. King;P. McKenna
中科院分区：
文献类型：
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作者：
R. Capdessus;M. King;P. McKenna
辐射电子源示出由激光脉冲（强度为1023 W/cm 2，持续时间等于30 fs）与近临界密度等离子体相互作用而产生。结果表明，高能同步辐射产生的背辐射反应有抵消有质动力作用的趋势。这增强了最高场区域中辐射电子的集体动力学，导致产生紧凑的辐射源（包含80%的同步辐射发射），其能量在激光脉冲持续时间上为数十MeV。这些现象进行了研究，使用QED粒子在细胞的代码，并与动力学模型占辐射反应力的电子分布函数。这些结果为超高激光强度下的电子-光子源提供了新的线索，可以在未来的激光设施上进行测试。
A radiating electron source is shown to be created by a laser pulse (with intensity of 1023 W/cm2 and duration equal to 30 fs) interacting with a near-critical density plasma. It is shown that the back radiation reaction resulting from high energy synchrotron radiation tends to counteract the action of the ponderomotive force. This enhances the collective dynamics of the radiating electrons in the highest field areas, resulting in the production of a compact radiation source (containing 80% of the synchrotron radiation emission), with an energy on the order of tens of MeV over the laser pulse duration. These phenomena are investigated using a QED-particle-in-cell code, and compared with a kinetic model accounting for the radiation reaction force in the electron distribution function. The results shed new light on electron-photon sources at ultra-high laser intensities and could be tested on future laser facilities.