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Multiple pulse sheath acceleration : an optical approach to spectral control

Robinson, A.P.L. and Neely, D. and McKenna, P. and Evans, R.G. (2007) Multiple pulse sheath acceleration : an optical approach to spectral control. In: 34th EPS Conference on Plasma Physics 2007, EPS 2007 - Europhysics Conference Abstracts. European Physical Society (EPS), Mulhouse, France. ISBN 9788392629009

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Abstract

Recent experimental results have shown that it is possible to produce laser-accelerated proton and ion beams with distinct quasi-monoenergetic features in the energy spectrum [1, 2]. As short-pulse ultraintense laser intensities exceed 1021Wcm−2, it may be possible to produce quasi-monoenergetic proton bunches with energies in the range of 100-200 MeV. This opens up the prospect of a new route to developing medical ion accelerators for oncology. In this paper we will briefly report on some of our recent work [3]. This showed that it is theoretically possible to produce laser-accelerated proton/ion beams with distinct spectral peaks by irradiating a solid target with two laser pulses that arrive in rapid succession. No special target composition or structure is required, unlike the other schemes that have been proposed [1, 2]. This may be advantageous for certain applications.