Experimental study on Kα X-ray emission from intense femtosecond laser-solid interactions | Zendy

Xu Miao-Hua | Zendy; Chen Li-Ming | Zendy; Li Yu-Tong | Zendy; Yuan Xiao-Hui | Zendy; Yunquan Liu | Zendy; Kazuhisa Nakajima | Zendy; Toshi Tajima | Zendy; Zhaohua Wang | Zendy; Wei Zhi-Yi | Zendy; Wei Zhao | Zendy; Jie Zhang | Zendy

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Experimental study on Kα X-ray emission from intense femtosecond laser-solid interactions

Author(s) -

Xu Miao-Hua,

Chen Li-Ming,

Li Yu-Tong,

Yuan Xiao-Hui,

Yunquan Liu,

Kazuhisa Nakajima,

Toshi Tajima,

Zhaohua Wang,

Wei Zhi-Yi,

Wei Zhao,

Jie Zhang

Publication year - 2007

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.56.353

Subject(s) - femtosecond , laser , energy conversion efficiency , physics , x ray , optics , photon , atomic physics , photon energy , electron , intensity (physics) , materials science , optoelectronics , nuclear physics

The characteristics of Kα X-ray sources generated by p-polarized femtosecond laser-solid interactions are experimentally studied in the relativistic regime. By use of knife-edge image technique and a single-photon-counting X-ray CCD camera, we obtaine the source size, the spectrum and the conversion efficiency of the Kα X-ray sources. The experimental results show that the conversion efficiency of Kα photons reaches an optimum value of 7.08×10-6/sr at the laser intensity of 1.6×1018W/cm2, which is different from the Reich's simulation results (Reich et al., 2000 Phys. Rev. Lett. 84 4846). We find that about 10% of laser energy is converted into the forward hot electrons at the laser intensity of 1.6×1018W/cm2.

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