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Limitation on Prepulse Level for Cone-Guided Fast-Ignition Inertial Confinement Fusion

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/48074

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Title: Limitation on Prepulse Level for Cone-Guided Fast-Ignition Inertial Confinement Fusion
Creators: MacPhee, A. G.; Divol, L.; Kemp, A. J.; Akli, K. U.; Beg, F. N.; Chen, C. D.; Chen, H.; Hey, D. S.; Fedosejevs, R. J.; Freeman, R. R.; Henesian, M.; Key, M. H.; Le Pape, S.; Link, A.; Ma, T.; Mackinnon, A. J.; Ovchinnikov, V. M.; Patel, P. K.; Phillips, T. W.; Stephens, R. B.; Tabak, M.; Town, R.; Tsui, Y. Y.; Van Woerkom, L. D.; Wei, M. S.; Wilks, S. C.
Issue Date: 2010-02-04
Publisher: American Physical Society
Citation: A. G. MacPhee et al, "Limitation on Prepulse Level for Cone-Guided Fast-Ignition Inertial Confinement Fusion," Physical Review Letters 104, no. 5 (2010), doi:10.1103/PhysRevLett.104.055002
DOI: 10.1103/PhysRevLett.104.055002
Abstract: The viability of fast-ignition (FI) inertial confinement fusion hinges on the efficient transfer of laser energy to the compressed fuel via multi-MeV electrons. Preformed plasma due to the laser prepulse strongly influences ultraintense laser plasma interactions and hot electron generation in the hollow cone of an FI target. We induced a prepulse and consequent preplasma in copper cone targets and measured the energy deposition zone of the main pulse by imaging the emitted K_α radiation. Simulation of the radiation hydrodynamics of the preplasma and particle in cell modeling of the main pulse interaction agree well with the measured deposition zones and provide an insight into the energy deposition mechanism and electron distribution. It was demonstrated that a under these conditions a 100 mJ prepulse eliminates the forward going component of ∼2–4 MeV electrons.
ISSN: 1079-7114
URI: http://hdl.handle.net/1811/48074
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