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首页> 外文期刊>Plasma physics and controlled fusion >Circularly polarized x-ray generation from an ionization induced laser plasma electron accelerator
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Circularly polarized x-ray generation from an ionization induced laser plasma electron accelerator

机译：来自电离诱导的激光等离子体电子加速器的圆偏振X射线产生

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摘要

A laser plasma accelerator could provide high-intensity x-ray radiation as the basis for the next generation compact radiation source. However, there is still a lack of tunability for the radiation polarization, especially the circular polarization. Here, we propose a new method for achieving intense circularly polarized x-rays via circularly polarized 20 TW laser pulses driving plasma wakefield acceleration in the regime of ionization injection. When the laser pulse duration is long enough, the ionization injected electrons would not only possess angular momentum, but also be resonant with the laser pulses, resulting in helix structure trajectories in the process of acceleration. In our simulation, we acquired synchrotron radiation with the circularly polarized degreeP(c)similar to 0.8, the pulse duration similar to 16 fs, the energy spectrum peak similar to 1 keV and the brilliance similar to 1.8 x 10(20)photons s(-1)mm(-2)mrad(-2)/0.1%BW. Such an ultra-fast and ultra-brilliant circularly polarized x-ray source has excellent application prospects in the analysis of complex bio-macro-molecule structures and for probing warm dense matter.
机译：激光等离子体加速器可以提供高强度的X射线辐射作为下一代紧凑辐射源的基础。然而，辐射极化仍然缺乏可调性，尤其是圆极化。在这里，我们提出了一种通过在电离注射的区域中通过圆极化的20w激光脉冲驱动等离子体唤醒加速度实现强烈的圆极化X射线的新方法。当激光脉冲持续时间足够长时，电离注入的电子不仅具有角动量，而且与激光脉冲也具有共振，导致加速过程中的螺旋结构轨迹。在我们的模拟中，我们采用类似于0.8的圆极化偏振（C）的同步辐射，脉冲持续时间类似于16 FS，能量谱峰值类似于1keV和亮度类似于1.8×10（20）光子S（ -1）mm（-2）mrad（-2）/0.1%bw。这种超快速和超出圆偏振的X射线源具有优异的应用前景，分析复杂的生物宏分子结构和探测温度致密物质。

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