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Low intensity threshold values for keV X-ray production in laser-cluster interaction

C. Prigent·L. Adoui·E. Lamour·J. -P. Rozet·D. Vernhet·O. Gobert·P. Meynadier·D. Normand·M. Perdrix
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Abstract

Absolute Ar XK (3 keV) and Xe XL (4 keV) photon yields are measured as a function of laser peak intensity, for large (104 - 105 atoms) argon and xenon clusters submitted to intense laser pulses. A clear threshold behavior is observed. The intensity threshold is found as low as 2 1014 Wcm-2, a value matching the production of singly-charged argon or doubly-charged xenon by optical field ionization. Possible mechanisms involved in the inner-shell ionization are discussed. The outcome on the optimization of keV X-ray production is underlined.

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C. Prigent, L. Adoui, E. Lamour, J. -P. Rozet, D. Vernhet, O. Gobert, P. Meynadier, D. Normand, M. Perdrix. 2005-07-06. Low intensity threshold values for keV X-ray production in laser-cluster interaction. https://arxiv.org/abs/physics/0507042

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