Title: Return current and proton emission from short pulse laser interactions with wire targets
Authors: Beg, FN ×
Wei, MS
Clark, EL
Dangor, AE
Evans, RG
Gibbon, Paul
Gopal, A
Lancaster, KL
Ledingham, KWD
McKenna, P
Norreys, PA
Tatarakis, M
Zepf, M
Krushelnick, K #
Issue Date: 2004
Publisher: American Institute of Physics
Series Title: Physics of Plasmas vol:11 issue:5 pages:2806-2813
Conference: 45th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society location:Albuquerque: NM date:NOV, 2003
Abstract: Results are presented from laser–plasma interaction experiments using the VULCAN laser at the Rutherford Appleton Laboratory. Wire targets were used to elucidate the role of the return currents generated by the relativistic electron beam leaving the target at laser intensities up to 5 3x10^19 W/cm^2. For some shots an additional wire or a foil was placed near the target wire. In other shots, a foil was used as the target with a wire behind. Three main observations were made: i) Z-pinch behavior in the wires due to the return currents, ii) optical transition radiation (OTR) at the second harmonic of the laser, and iii) proton emission. The OTR and the proton emission were observed from both the primary wire target and the adjacent wire. The OTR emission is associated
with electron bunches at twice the laser frequency due to ponderomotive JxB acceleration by the laser. The proton emission from the adjacent target was likely due to field emission of electrons by the large potential produced from charging of the primary wire target. The observations agree with simulations using the three-dimensional tree code PEPC and the two-and-one-half-dimensional particle-in-cell code OSIRIS.
ISSN: 1070-664X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science