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Scaling of proton acceleration driven by petawatt-laser-plasma interactions

Robson, L. and Simpson, P.T. and Clarke, R.J. and Ledingham, K.W.D. and Lindau, F. and Lundh, O. and McCanny, T. and Mora, P. and Neely, D. and Wahlström, C.G. and Zepf, M. and McKenna, P. (2007) Scaling of proton acceleration driven by petawatt-laser-plasma interactions. Nature Physics, 3. pp. 58-62. ISSN 1745-2473

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Abstract

The possibility of using high-power lasers to generate high-quality beams of energetic ions is attracting large global interest. The prospect of using laser-accelerated protons in medicine attracts particular interest, as these schemes may lead to compact and relatively low-cost sources. Among the challenges remaining before these sources can be used in medicine is to increase the numbers and energies of the ions accelerated. Here, we extend the energy and intensity range over which proton scaling is experimentally investigated, up to 400 J and 6×1020 Wcm−2 respectively, and find a slower proton scaling than previously predicted.With the aid of plasma-expansion simulation tools, our results suggest the importance of time-dependent andmultidimensional effects in predicting the maximum proton energy in this ultrahigh-intensity regime. The implications of our new understanding of proton scaling for potential medical applications are discussed.

Item type: Article
ID code: 9174
Keywords: high-power lasers, high-quality beams, energetic ions, laser-accelerated protons, proton acceleration, petawatt-laser–plasma interactions, plasma-expansion simulation tools, medical applications, Medicine (General), Physics, Physics and Astronomy(all)
Subjects: Medicine > Medicine (General)
Science > Physics
Department: Faculty of Science > Physics
Unknown Department
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 04 Dec 2009 17:56
    Last modified: 04 Sep 2014 21:05
    URI: http://strathprints.strath.ac.uk/id/eprint/9174

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