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The application of laser-driven proton beams to the radiography of intense laser–hohlraum interactions
Queen's University of Belfast.
Queen's University of Belfast.
Queen's University of Belfast.
Atomic Weapon Establishment, Aldermaston, Reading, Berkshire .
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2010 (English)In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 12, no 4, 045006- p.Article in journal (Refereed) Published
Abstract [en]

Plasma expansion following the interaction of an intense laser beam with the inner surface of gold hohlraums, emulating conditions relevant to indirect drive inertial confinement fusion (ICF), has been investigated by a radiographic technique which employs a beam of laser-accelerated protons. This probing technique has made it possible to measure the electric field distribution associated with the plasma front and its propagation throughout the interior of the hohlraum with a temporal and spatial resolution of the order of a few ps and μm, respectively. The data indicate that the expanding plasma slows down approaching the opposite walls, possibly due to the interaction with x-ray heated plasma from the non-irradiated walls. The electric field at the plasma front shows a bipolar structure, suggesting the presence of ion-acoustic soliton-like structures cotraveling with the front. Data obtained using enclosed hohlraums suggest the feasibility of this type of diagnosis in gas-filled hohlraums, as currently employed in ICF experiments.

Place, publisher, year, edition, pages
IOP Publishing Ltd , 2010. Vol. 12, no 4, 045006- p.
Keyword [en]
laser plasma, proton radiography method
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-56220DOI: 10.1088/1367-2630/12/4/045006ISI: 000277355400004OAI: oai:DiVA.org:liu-56220DiVA: diva2:317063
Note
Original Publication: G Sarri, C A Cecchetti, L Romagnani, C M Brown, D J Hoarty, S James, J Morton, Mark E Dieckmann, R Jung, O Willi, S V Bulanov, F Pegoraro and Marco Borghesi, The application of laser-driven proton beams to the radiography of intense laser–hohlraum interactions, 2010, New Journal of Physics, (12), 4, 045006. http://dx.doi.org/10.1088/1367-2630/12/4/045006 Copyright: Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft http://www.iop.org/EJ/journal/1367-2630/1 Available from: 2010-05-02 Created: 2010-05-02 Last updated: 2017-12-12

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Dieckmann, Mark E

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