Bulletin of the American Physical Society
49th Annual Meeting of the Division of Plasma Physics
Volume 52, Number 11
Monday–Friday, November 12–16, 2007; Orlando, Florida
Session GO7: Laser Driven Electron and Ion Acceleration
9:30 AM–12:18 PM,
Tuesday, November 13, 2007
Rosen Centre Hotel Room: Salon 7/8
Chair: Karl Krushelnick, University of Michigan
Abstract ID: BAPS.2007.DPP.GO7.14
Abstract: GO7.00014 : Collimated High-Quality Proton Beam Generation in Laser Tailored-Target Interaction*
12:06 PM–12:18 PM
Preview Abstract Abstract
(Utsunomiya University, Japan)
A high-quality collimated proton beam generation is demonstrated by using a tailored thin foil target. A robustness of a thin-foil tailored hole target is demonstrated by particle simulations in laser-produced proton generation. The tailored target has holes at the target rear surface. When an intense short pulse laser illuminates the thin foil target with the hole, transverse edge fields of an accelerated electron cloud and an ion cloud are shielded by a protuberant part of the hole so that the proton beam divergence is suppressed [1, 2]. This paper presents the robustness of the hole target against laser parameter changes in a laser spot size and in a laser pulse length, against a contaminated proton source layer and against a laser alignment error. The 2.5-dimensional PIC (particle-in-cell) simulations also present that a multiple-hole target is robust against a laser alignment error and a target positioning error. The multi-hole target may serve a robust target for practical uses to produce a collimated proton beam. ~R. Sonobe, et al., Phys. Plasmas, 12 (2005) 073104.  M. Nakamura, et al., J. Appl. Phys., 101 (2007) 113305.
*This work was partly supported by JSPS, MEXT, Center for Optical Researcha and Education (CORE), Utsunomiya Univ., and ILE.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.DPP.GO7.14
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