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Phys. Plasmas 17, 063102 (2010); http://dx.doi.org/10.1063/1.3428741 (12 pages)

Unlimited energy gain in the laser-driven radiation pressure dominant acceleration of ions

S. V. Bulanov1, E. Yu. Echkina2, T. Zh. Esirkepov1, I. N. Inovenkov2, M. Kando1, F. Pegoraro3, and G. Korn4

1Kansai Photon Science Institute, JAEA, Kizugawa, Kyoto 619-0215, Japan
2CMC, Moscow State University, Moscow 119899, Russia
3Department of Physics, University of Pisa and CNISM, Pisa 56127, Italy
4Max Plank Institute of Quantum Optics, Garching 85748, Germany

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(Received 12 January 2010; accepted 15 April 2010; published online 9 June 2010)

The energy of the ions accelerated by an intense electromagnetic wave in the radiation pressure dominated regime can be greatly enhanced by a transverse expansion of a thin target. The expansion decreases the number of accelerated ions in the irradiated region increasing the energy and the longitudinal velocity of the remaining ions. In the relativistic limit, the ions become phase locked with respect to the electromagnetic wave resulting in an unlimited ion energy gain. This effect and the use of optimal laser pulse shape provide a new approach for greatly enhancing the energy of laser accelerated ions.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. MATHEMATICAL MODEL
  3. ION ACCELERATION IN THE EXPANDING OR CONTRACTING FOIL
    1. The shell expanding in the transverse direction
    2. Laser pulse with the tailored shape
    3. Shell contracting in transverse direction
  4. EFFICIENCY OF THE ION ACCELERATION IN NONRELATIVISTIC LIMIT
  5. PARTICLE-IN-CELL SIMULATIONS OF THE RADIATION PRESSURE ACCELERATION OF A MASS LIMITED TARGET
  6. PIC SIMULATIONS OF RADIATION PRESSURE ACCELERATION OF IONS IN THE LASER PULSE INTERACTION WITH A THIN FOIL TARGET
  7. CONCLUSION

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

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