Docstoc

Laser acceleration of monoenergetic protons from ultra-thin foils

Document Sample
Laser acceleration of monoenergetic protons from ultra-thin foils Powered By Docstoc
					             Laser acceleration of monoenergetic protons from ultra-thin foils
                        in the Directed Coulomb Explosion regime.
                   S. S. Bulanov, V. Chvykov, G. Kalinchenko, T. Matsuoka, P. Rousseau,
               S. Reed, V. Yanovsky, D. W. Litzenberg, K. Krushelnick and A. Maksimchuk
  Coulomb Explosion of a double layer target (principal scheme - animation)
 • Heavy ions are ionized
                                                          ELECTRONS
                                                                                             Scheme of interaction
 by the laser pulse
 • Electrons are expelled from
 the target by the laser pulse
                                                                                                                Parameters of simulation
                                                                                    Laser                       Simulation box: 20 λ x 10 λ
 • Light ions are accelerated
                                                                                                                Grid mesh size: λ/200
 in the charge separation field                                                     Pulse                       Laser pulse: 500 TW
 • Heavy ion layer explodes                                                                                     Linearly polarized (z)
                                                                                                                Focused: f/D=1.5
 due to the Coulomb repulsion
 of excess positive charge
                                                                                             f                  Foil: first layer Al+13,

           ELECTROSTATIC                                  LIGHT IONS
                                                                                                 X              electron density 400ncr
                                                                                                                second layer H+,
                                        HEAVY IONS
                 FIELD                                                                                          electron density 30 ncr


            Directed Coulomb Explosion of a double layer target (2D particle-in-cell simulation results)
                 Accelerating Field                                    Spectrum                      Ion density
                                    Longitudinal                                                                       protons
  4                                 electric field
                                                                                    4
  2                                                                                 2
y                                                                                 y 0
  0
 -2                                                                                 -2
                                  protons
 -4                                                                                 -4                    Aluminum ions

      0          5           10 x           15       20                                  0           5     10           15           20
                                                                                                                   x
               Center for the Advancement of Frontiers in Optical Coherent and Ultrafast Science
FOCUS                   The University of Michigan and the University of Texas at Austin
                                              NSF Award 0114336

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:4/20/2013
language:Unknown
pages:1