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Coherent synchrotron emission in transmission with double foil target

X R Xu, B Qiao, H X Chang, Y X Zhang, H Zhang, C L Zhong, C T Zhou, S P Zhu, X T He2018年Plasma Physics and Controlled FusionIF 2.2出版社

Generation of intense single attosecond pulses from coherent synchrotron emission (CSE), in the transmitted direction of the laser-irradiated double foil targets, has been investigated theoretically and numerically. Unlike conventional CSE in the single foil target case, here the dense electron nanobunch is formed in the vacuum gap between two foils, which is composed of the electrons blown out from the first ultrathin foil. Owing to the existence of the vacuum gap, the electron nanobunch can be accelerated to more energy. In addition, more laser energy can penetrate through the nanobunch and get reflected from the second foil. These reflected lasers and electron nanobunches interact with each other and results in enhanced CSE and consequently, the generation of intense attosecond pulses. Particle-in-cell simulations show that a single attosecond pulse with duration of 18 , photon energy and peak intensity of can be obtained from the double-foil targets irradiated by a laser at intensity of .

日本語訳

レーザー照射された二重フォイルターゲットの透過方向におけるコヒーレントシンクロトロン放射(CSE)からの強力な単一アト秒パルスの生成について、理論的および数値的に調査した。単一フォイルターゲットの場合の従来のCSEとは異なり、ここでは高密度電子ナノバンチが2つのフォイル間の真空ギャップ内に形成され、これは最初の極薄フォイルから吹き出された電子で構成される。真空ギャップの存在により、電子ナノバンチはより高いエネルギーへと加速され得る。さらに、より多くのレーザーエネルギーがナノバンチを透過して2番目のフォイルから反射され得る。これらの反射レーザーと電子ナノバンチが互いに相互作用し、その結果CSEが増強され、それに伴って強力なアト秒パルスが生成される。粒子インセルシミュレーションにより、強度 のレーザーを照射した二重フォイルターゲットから、持続時間18 、光子エネルギー 、ピーク強度 の単一アト秒パルスが得られることが示された。

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