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Physics of Plasmas / Volume 18 / Issue 12 / ARTICLES / Lasers, Particle Beams, Accelerators, Radiation Generation

Phys. Plasmas 18, 123105 (2011); http://dx.doi.org/10.1063/1.3672515 (7 pages)

Energetics and energy scaling of quasi-monoenergetic protons in laser radiation pressure acceleration

Tung-Chang Liu1, Xi Shao1, Chuan-Sheng Liu1, Jao-Jang Su1, Bengt Eliasson1,2, Vipin Tripathi3, Galina Dudnikova1, and Roald Z. Sagdeev1

1University of Maryland, College Park, Maryland 20742, USA
2Ruhr-University Bochum, D-44780 Bochum, Germany
3Indian Institute of Technology, New Delhi 110016, India

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(Received 18 August 2011; accepted 17 November 2011; published online 29 December 2011)

Theoretical and computational studies of the ion energy scaling of the radiation pressure acceleration of an ultra-thin foil by short pulse intense laser irradiation are presented. To obtain a quasi-monoenergetic ion beam with an energy spread of less than 20%, two-dimensional particle-in-cell simulations show that the maximum energy of the quasi-monoenergetic ion beam is limited by self-induced transparency at the density minima caused by the Rayleigh-Taylor instability. For foils of optimal thickness, the time over which Rayleigh-Taylor instability fully develops and transparency occurs is almost independent of the laser amplitude. With a laser power of about one petawatt, quasi-monogenetic protons with 200 MeV and carbon ions with 100 MeV per nucleon can be obtained, suitable for particle therapy applications.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. SIMULATION SETUP AND RESULTS
  3. DISCUSSION ON THE ENERGY SCALING
  4. THE INFLUENCE OF DIFFERENT INITIAL CONDITIONS ON THE RESULTS
  5. CONCLUSIONS

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KEYWORDS and PACS

Keywords

plasma density, plasma light propagation, plasma simulation, radiation pressure, Rayleigh-Taylor instability

PACS

  • 52.38.Kd

    Laser-plasma acceleration of electrons and ions

  • 52.35.Py

    Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)

  • 52.65.Rr

    Particle-in-cell method

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3672515

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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