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19 October 2012 Longitudinal field acceleration of electrons by a tightly focused TM01 laser mode
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Energetic electrons generation by longitudinal field acceleration from a laser pulse was demonstrated. The longitudinal field was generated by focusing a radially polarised TM01 ultrashort laser pulse (1,8 microns, 550 uJ, 15 fs) with a high numerical aperture parabola. The created longitudinal field was intense enough to ionised and accelerated electrons with a few tens of keV from a low density oxygen gaz. The energy, spectrum, number of charges per shot and divergence of the generated electron bunches have been measured and will be presented. Electron bunch pulse duration, space charge effects and energy tunability will also be discussed.
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J. P. MacLean, S. Payeur, S. Fourmaux, C. Tchervenkov, B. Schmidt, P. Lassonde, F. Légaré, M. Piché, and J. C. Kieffer "Longitudinal field acceleration of electrons by a tightly focused TM01 laser mode", Proc. SPIE 8509, Penetrating Radiation Systems and Applications XIII, 85090K (19 October 2012);

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