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Rev Sci Instrum. 2010 Dec;81(12):123302. doi: 10.1063/1.3514084.

Single-shot microscopic electron imaging of intense femtosecond laser-produced plasmas.

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  • 1Department of Physics, Graduate School of Science, Kyoto University Kitashirakawa, Sakyo, Kyoto 606-8502, Japan.


A simple technique for single-shot microscopic electron imaging was demonstrated for the study of intense femtosecond laser-produced plasmas. Passed through a permanent magnet lens designed for 110-keV electrons, hot electrons emitted from the plasma produced by a single laser pulse of 0.8 mJ with intensity of 3 × 10(16) W/cm(2) were successfully imaged. Analyzing this image, we found that electrons were emitted from an area of 3 μm in diameter. At higher laser intensity of 10(18) W/cm(2), distinct structures were observed in and near the focal spot of the laser; that is, the electrons were emitted from several separate spots. These results show that laser-plasma electron imaging is promising for studying the interactions of femtosecond lasers with high-density plasmas.

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