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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Spectral enhancement in the double pulse regime of laser proton acceleration

Markey, K. and McKenna, P. and Brenner, C. M. and Carroll, D. C. and Günther, M.M. and Harres, K. and Kar, S. and Lancaster, K. and Nürnberg, F. and Quinn, M. N. and Robinson, A. P. L. and Roth, M. and Zepf, M. and Neely, D. (2010) Spectral enhancement in the double pulse regime of laser proton acceleration. Physical Review Letters, 105 (19). ISSN 0031-9007

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Abstract

The use of two separate ultraintense laser pulses in laser-proton acceleration was compared to the single pulse case employing the same total laser energy. A double pulse profile, with the temporal separation of the pulses varied between 0.75-2.5 ps, was shown to result in an increased maximum proton energy and an increase in conversion efficiency to fast protons by up to a factor of 3.3. Particle-in-cell simulations indicate the existence of a two stage acceleration process. The second phase, induced by the main pulse preferentially accelerates slower protons located deeper in the plasma, in contrast to conventional target normal sheath acceleration.