Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session PO8: Relativistic Laser Plasma Interaction and Particles (ions, electrons, positrons, neutrons) III
2:00 PM–4:24 PM,
Wednesday, November 7, 2018
OCC
Room: C120-122
Chair: Louise Willingale, University of Michigan
Abstract ID: BAPS.2018.DPP.PO8.8
Abstract: PO8.00008 : Control of fast electron propagation in plastic foam by doping high-Z elements*
3:24 PM–3:36 PM
Presenter:
Xiaohu Yang
(Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA, Deparment of Physics, National University of Defense Technology, Changsha 41007)
Authors:
Xiaohu Yang
(Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA, Deparment of Physics, National University of Defense Technology, Changsha 41007)
Han Xu
(School of Computer Science, National University of Defense Technology, Changsha 410073, China)
Yanyun Ma
(Deparment of Physics, National University of Defense Technology, Changsha 410073, China)
Chuang Ren
(Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA)
Fast electron propagation in foam target is studied by a newly developed hybrid particle-in-cell (PIC)/fluid simulation code named HEETS. The code employs an explicit time-stepping approach, treats the fast electrons by a standard, relativistic PIC method (including scattering and drag by the background plasmas), and models the background plasma as a collisional fluid.
A scheme of doping high-Z elements (like bromine (Br)) into low-Z target (polystyrene foam) in order to confine ultraintense laser-driven fast electron propagation in target is proposed. It is found that fast electrons can be confined better in doped target compared to that in pure low-Z target, attributing to its increasing resistivity and density, which induce an intenser resistive magnetic field to collimate the fast electron propagation. The increase of energy deposition in targets is slightly for doped targets, suggesting that it is suitable for long propagation of fast electrons. The scheme is also effective for fast electrons driven by higher laser intensities, like intensity required by fast ignition (I = 1020W/cm2). The results here should be helpful for the applications of ultraintense laser-driven fast electrons.
*X.H.Y. acknowledges the support from the China Scholarship Council.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.PO8.8
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