Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Beschleuniger II
HK 45.2: Vortrag
Mittwoch, 23. März 2011, 17:00–17:15, A-1
Electron acceleration mechanisms in cone targets - scaling up the energy of laser accelerated ions — Thomas Kluge1, Gaillard Sandrine1, Flippo Kirk2, Brady Gall3, Tom Lockard4, Matthias Geissel5, D. Offermann2, M. Schollmeier3, Stefan D. Kraft1, Josephine Metzkes1, Karl Zeil1, Ulrich Schramm1, Yasuhiko Sentoku4, Wolfgang Enghardt6, Roland Sauerbrey1, •Michael Bussmann1, and Tomas E. Cowan1 — 1Forschungszentrum Dresden-Rossendorf (FZD), 01328 Dresden, Germany — 2Los Alamos National Laboratory, Los Alamos, NM 87545, USA — 3University of Missouri, Columbia, MO 65201, USA — 4University of Nevada, Reno, NV 89503, USA — 5Sandia National Laboratories, Albuquerque, NM 87123, USA — 6OncoRay, TU Dresden, 01307 Dresden, Germany
In 2009, at the LANL Trident laser facility a new world record in laser accelerated proton energy has been set, exceeding 65 MeV, using hallow conical targets. We performed 2D collissional PIC simulations and identify two novel electron acceleration mechanisms that have not been considered before to enhance ion acceleration: the direct acceleration of electrons comoving with the driving laser along the the cone-wall inner surface (DASE) and the acceleration of electrons in surface plasma waves (PWA). We find that they are responsible for a significant increase in both electron number and energy in the case of a grazing laser incidence onto the inner cone wall surface compared to regular flat foils. We study the scaling of the electron and ion energies for various target and laser parameters.