Generating High-Current Monoenergetic Proton Beams by a CircularlyPolarized Laser Pulse in the Phase-StableAcceleration Regime

X. Q. Yan (颜学庆), C. Lin (林晨), Z. M. Sheng (盛政明), Z. Y. Guo (郭之虞), B. C. Liu (刘必成), Y. R. Lu (陆元荣), J. X. Fang (方家驯), and J. E. Chen (陈佳洱)
Phys. Rev. Lett. 100, 135003 – Published 3 April 2008

Abstract

A new ion acceleration method, namely, phase-stable acceleration, using circularly-polarized laser pulses is proposed. When the initial target density n0 and thickness D satisfy aL(n0/nc)D/λL and D>ls with aL, λL, ls, and nc the normalized laser amplitude, the laser wavelength in vacuum, the plasma skin depth, and the critical density of the incident laser pulse, respectively, a quasiequilibrium for the electrons is established by the light pressure and the space charge electrostatic field at the interacting front of the laser pulse. The ions within the skin depth of the laser pulse are synchronously accelerated and bunched by the electrostatic field, and thereby a high-intensity monoenergetic proton beam can be generated. The proton dynamics is investigated analytically and the results are verified by one- and two-dimensional particle-in-cell simulations.

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  • Received 24 October 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.135003

©2008 American Physical Society

Authors & Affiliations

X. Q. Yan (颜学庆)1,5,*, C. Lin (林晨)1, Z. M. Sheng (盛政明)1,2,3, Z. Y. Guo (郭之虞)1, B. C. Liu (刘必成)1,4, Y. R. Lu (陆元荣)1, J. X. Fang (方家驯)1, and J. E. Chen (陈佳洱)1

  • 1State Key Laboratory of Nuclear Physics and Technology, Instituteof Heavy Ion Physics, Peking University, Beijing100871, China
  • 2Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, CAS, Beijing 100080, China
  • 3Department of Physics, Shanghai Jiao Tong University,Shanghai 200240, China
  • 4The Graduate University of Chinese Academy ofScience, Beijing, China
  • 5Center for Applied Physics and Technology, PekingUniversity, Beijing 100871, China

  • *X.Yan@pku.edu.cn

Comments & Replies

Yan et al. Reply:

X. Q. Yan, C. Lin, Z. M. Sheng, Z. Y. Guo, B. C. Liu, Y. R. Lu, J. X. Fang, and J. E. Chen
Phys. Rev. Lett. 102, 239502 (2009)

Comment on “Generating High-Current Monoenergetic Proton Beams by a Circularly Polarized Laser Pulse in the Phase-Stable Acceleration Regime”

Liangliang Ji, Baifei Shen, Xiaomei Zhang, Fengchao Wang, Zhangying Jin, Meng Wen, Wenpeng Wang, and Jiancai Xu
Phys. Rev. Lett. 102, 239501 (2009)

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Vol. 100, Iss. 13 — 4 April 2008

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