A hemispherical conically guided indirectly driven inertial confinement fusion capsule has been considered. The fast ignition of the precompressed capsule driven by one or two laser-accelerated proton beams has been numerically investigated. The energy distribution of the protons is Gaussian with a mean energy of and a full width at half maximum of . A new scheme that uses two laser-accelerated proton beams is proposed. It is found that the energy deposition of provided by a first proton beam generates a low-density cylindrical channel and launches a forward shock. A second proton beam, delayed by a few tens of ps and driving the energy of , crosses the low-density channel and heats the dense shocked region where the ignition of the deuterium-tritium nuclear fuel is achieved. For the considered capsule, this new two-beam configuration reduces the ignition energy threshold to .
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Research Article| December 08 2006
Fast ignition of a compressed inertial confinement fusion hemispherical capsule by two proton beams
Mauro Temporal; Fast ignition of a compressed inertial confinement fusion hemispherical capsule by two proton beams. Phys. Plasmas 1 December 2006; 13 (12): 122704. https://doi.org/10.1063/1.2400592
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