Intense high-quality medical proton beams via laser fields

Details Intense high-quality medical proton beams via laser fields Intense high-quality medical proton beams via laser fields

2010-04-23

arxiv.org/abs/1004.4056v3

Optics Express, Vol. 18, Issue 25, pp. 25950-25957 (2010)

Physics

Accelerator Physics

14 pages, 3 figures, 1 table

Scientific paper

10.1364/OE.18.025950

During the past decade, the interaction of high-intensity lasers with solid targets has attracted much interest, regarding its potential in accelerating charged particles. In spite of tremendous progress in laser-plasma based acceleration, it is still not clear which particle beam quality will be accessible within the upcoming multi petawatt (1 PW = 10$^{15}$ W) laser generation. Here, we show with simulations based on the coupled relativistic equations of motion that protons stemming from laser-plasma processes can be efficiently post-accelerated using crossed laser beams focused to spot radii of a few laser wavelengths. We demonstrate that the crossed beams produce monoenergetic accelerated protons with kinetic energies $> 200$ MeV, small energy spreads ($\approx$ 1$%$) and high densities as required for hadron cancer therapy. To our knowledge, this is the first scheme allowing for this important application based on an all-optical set-up.

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