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Experimental study on $$K$$$$_{alpha}$$ X-ray emission from intense femtosecond laser-solid interactions

Xu, M. H.*; Chen, L.-M.; Li, Y.-T.*; Yuan, X.-H.*; Liu, Y.-Q.*; Nakajima, Kazuhisa; Tajima, Toshiki; Wang, Z.-H.*; Wei, Z.-Y.*; Zhao, W.*; Zhang, J.*

The characteristics of $$K$$$$_{alpha}$$ 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 obtain the source size, the spectrum and the conversion efficiency of the $$K$$$$_{alpha}$$ X-ray sources. The experimental results show that the conversion efficiency of $$K$$$$_{alpha}$$ photons reaches an optimum value 7.08$$times$$10$$^{-6}$$/sr at the laser intensity of 1.6$$times$$10$$^{18}$$W/cm$$^{2}$$, which is different from the Reich's simulation results. We find that about 10% of laser energy is converted into the forward hot electrons at the laser intensity of 1.6$$times$$10$$^{18}$$W/cm$$^{2}$$.

Language

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English

Journal

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Acta Physica Sinica

Volume

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56

Number

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1

Pages

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p.353 - 358

Publication Year/Month

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2007/01

Meeting title

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.7498/aps.56.353

DOI for research data

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Keywords

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no keyword

Research Facility

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Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:37.28

Category:Physics, Multidisciplinary

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