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Generation of ultraintense proton beams by multi-ps circularly polarized laser pulses for fast ignition-related applications
Umeå University, Faculty of Science and Technology, Department of Physics.
2011 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 18, 53108- p.Article in journal (Refereed) Published
Abstract [en]

A scheme of generation of ultraintense proton beams relevant for proton fast ignition (PFI) which employs multi-ps, circularly polarized laser pulse irradiating a thick (≥ 10 μm) H-rich target is proposed and examined using one-dimensional particle-in cell-simulations. It is shown that a 5-ps laser pulse of intensity ∼ (2–5) × 1020W/cm2 irradiating the target of the areal proton density ∼ 2 × 1020cm−2 can produce – with a high energetic efficiency – a proton beam (plasma block) of parameters (intensity, energy fluence, pulse duration, proton energy spectrum) close to those required for PFI. At a fixed total laser energy, the proton beam parameters can be controlled and fitted to the PFI requirements by changing the laser intensity (energy fluence) and/or the target thickness as well as by using a shaped (curved) target inserted into a guiding cone.

Place, publisher, year, edition, pages
New York: American Institute of physics, , 2011. Vol. 18, 53108- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-49163DOI: 10.1063/1.3590856OAI: oai:DiVA.org:umu-49163DiVA: diva2:453142
Available from: 2011-11-01 Created: 2011-11-01 Last updated: 2017-12-08

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