1School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100191 2State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 3Beijing Third Hospital, Peking University, Beijing 100191
Abstract:During the laser foil interaction, the output ion beam quality including the energy spread and beam divergence can be improved by the target ablation, due to the direct laser acceleration (DLA) electrons generated in the ablation plasma. The acceleration field established at the target rear by these electrons, which is highly directional and triangle-envelope, is helpful for the beam quality. With the help of the target ablation, both the beam divergence and energy spread will be reduced. If the ablation is more sufficient, the impact of DLA-electron-caused field will be strengthened, and the beam quality will be better, confirmed by the particle-in-cell simulation.
Borghesi M, Campbell D H, Schiavi A, Haines M G, Willi O, MacKinnon A J, Patel P, Gizzi L A, Galimberti M, Clarke R J and others 2002 Phys. Plasmas9 2214
[2]
Bulanov S V, Esirkepov T Z, Khoroshkov V S, Kuznetsov A V, Pegoraro F and others 2002 Phys. Lett. A 299 240
[3]
Bulanov S S, Brantov A, Bychenkov V Y, Chvykov V, Kalinchenko G, Matsuoka T, Rousseau P, Reed S, Yanovsky V, Krushelnick K et al 2008 Med. Phys.35 1770
[4]
Snavely R A, Key M H, Hatchett S P, Cowan T E, Roth M, Phillips T W, Stoyer M A, Henry E A, Sangster T C, Singh M S et al 2000 Phys. Rev. Lett.85 2945
[5]
Hatchett S P, Brown C G, Cowan T E, Henry E A, Johnson J S, Key M H, Koch J A, Langdon A B, Lasinski B F, Lee R W et al 2000 Phys. Plasmas7 2076
[6]
Schwoerer H, Pfotenhauer S, J?ckel O, Amthor K U, Liesfeld B, Ziegler W, Sauerbrey R, Ledingham K W D and Esirkepov T 2006 Nature439 455
[7]
Hegelich B M, Albright B J, Cobble J, Flippo K, Letzring S, Paffett M, Ruhl H, Schreiber J, Schulze R K and Fernandez J C 2006 Nat. Phys.439 441
[8]
Robson L, Simpson P T, Clarke R J, Ledingham K W D, Lindau F, Lundh O, McCanny T, Mora P, Neely D, Wahlstrom C G et al 2007 Nat. Phys.3 58
Roth M, Blazevic A, Geissel M, Schlegel T, Cowan T E, Allen M, Gauthier J C, Audebert P, Fuchs J, Meyer ter Vehn J et al 2002 Phys. Rev. ST Accel. Beams5 061301
[21]
Haberberger D, Tochitsky S, Fiuza F, Gong C, Fonseca R A, Silva L O, Mori W B and Joshi C 2011 Nat. Phys.8 95