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利用不规则间隔的电流峰值在自由电子激光器中产生孤立的阿秒X射线脉冲。

Using irregularly spaced current peaks to generate an isolated attosecond X-ray pulse in free-electron lasers.

作者信息

Tanaka Takashi, Parc Yong Woon, Kida Yuichiro, Kinjo Ryota, Shim Chi Hyun, Ko In Soo, Kim Byunghoon, Kim Dong Eon, Prat Eduard

机构信息

RIKEN SPring-8 Center, Koto 1-1-1, Sayo, Hyogo 679-5148, Japan.

Physics Group, PAL-XFEL, Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea.

出版信息

J Synchrotron Radiat. 2016 Nov 1;23(Pt 6):1273-1281. doi: 10.1107/S1600577516013345. Epub 2016 Oct 6.

DOI:10.1107/S1600577516013345
PMID:27787233
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5357007/
Abstract

A method is proposed to generate an isolated attosecond X-ray pulse in free-electron lasers, using irregularly spaced current peaks induced in an electron beam through interaction with an intense short-pulse optical laser. In comparison with a similar scheme proposed in a previous paper, the irregular arrangement of current peaks significantly improves the contrast between the main and satellite pulses, enhances the attainable peak power and simplifies the accelerator layout. Three different methods are proposed for this purpose and achievable performances are computed under realistic conditions. Numerical simulations carried out with the best configuration show that an isolated 7.7 keV X-ray pulse with a peak power of 1.7 TW and pulse length of 70 as can be generated. In this particular example, the contrast is improved by two orders of magnitude and the peak power is enhanced by a factor of three, when compared with the previous scheme.

摘要

提出了一种在自由电子激光器中产生孤立阿秒X射线脉冲的方法，该方法利用电子束与强短脉冲光学激光相互作用产生的不规则间隔电流峰。与之前一篇论文中提出的类似方案相比，电流峰的不规则排列显著提高了主脉冲和卫星脉冲之间的对比度，增强了可达到的峰值功率，并简化了加速器布局。为此提出了三种不同的方法，并在实际条件下计算了可实现的性能。采用最佳配置进行的数值模拟表明，可以产生一个峰值功率为1.7太瓦、脉冲长度为70阿秒的孤立7.7千电子伏特X射线脉冲。在这个具体例子中，与之前的方案相比，对比度提高了两个数量级，峰值功率提高了两倍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/043693d16d48/s-23-01273-fig11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/da7dbe9d8003/s-23-01273-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/365a17693c83/s-23-01273-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/65237e2626a8/s-23-01273-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/83f42dd5941d/s-23-01273-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/716a14970957/s-23-01273-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/7404e32979db/s-23-01273-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/3c8df39540a8/s-23-01273-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/20973aa47566/s-23-01273-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/925caa0b4c8c/s-23-01273-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/c140b34b35ac/s-23-01273-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/043693d16d48/s-23-01273-fig11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/da7dbe9d8003/s-23-01273-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/365a17693c83/s-23-01273-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/65237e2626a8/s-23-01273-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/83f42dd5941d/s-23-01273-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/716a14970957/s-23-01273-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/7404e32979db/s-23-01273-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/3c8df39540a8/s-23-01273-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/20973aa47566/s-23-01273-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/925caa0b4c8c/s-23-01273-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/c140b34b35ac/s-23-01273-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e216/5357007/043693d16d48/s-23-01273-fig11.jpg

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