In the dynamic-shell (DS) concept [Goncharov et al., Phys Rev. Lett. 125, 065001 (2020)] for laser-driven inertial confinement fusion the deuterium-tritium fuel is initially in the form of a ho- mogeneous liquid inside a wetted-foam spherical shell. This fuel is ignited using a convensional implosion, which is preceeded by a initial compression of the fuel followed by its expansion and dynamic formation of a high-density fuel shell with a low-density interior. This letter reports on a scaled-down, proof-of-principle experiment on the OMEGA laser demonstrating, for the first time, the feasibility of DS formation. A shell is formed by convergent shocks launched by laser pulses at the edge of a plasma sphere, with the plasma itself formed as a result of laser-driven compression and relaxation of a surrogate plastic-foam ball target. Three x-ray diagnostics, namely, 1-D spa- tially resolved self-emission streaked imaging, 2-D self-emission framed imaging, and backlighting radiography, have shown good agreement with the predicted evolution of the DS and its stability to low-mode perturbations introduced by laser irradiation and target asymmetries.
Proof-of-principle experiment on the dynamic shell formation for inertial confinement fusion / Igumenshchev, I. V.; Theobald, W.; Stoeckl, C.; Shah, R. C.; Bishel, D. T.; Goncharov, ∗ V. N.; Bonino, † M. J.; Campbell, E. M.; Ceurvorst, L.; Chin, D. A.; Collins, ∗ T. J. B.; Fess, S.; Harding, D. R.; Sampat, S.; Shaffer, N. R.; Shvydky, A.; Smith, E. A.; Trickey, ∗ W. T.; Waxer, L. J.; Cola ̈ıtis, A.; Liotard, R.; Adrian, P.; Atzeni, S.; Barbato, F.; Savino, L.; Alfonso, N.; Haid, A.; Do, Mi. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - (2023).
Proof-of-principle experiment on the dynamic shell formation for inertial confinement fusion
S. Atzeni;F. Barbato;L. Savino;
2023
Abstract
In the dynamic-shell (DS) concept [Goncharov et al., Phys Rev. Lett. 125, 065001 (2020)] for laser-driven inertial confinement fusion the deuterium-tritium fuel is initially in the form of a ho- mogeneous liquid inside a wetted-foam spherical shell. This fuel is ignited using a convensional implosion, which is preceeded by a initial compression of the fuel followed by its expansion and dynamic formation of a high-density fuel shell with a low-density interior. This letter reports on a scaled-down, proof-of-principle experiment on the OMEGA laser demonstrating, for the first time, the feasibility of DS formation. A shell is formed by convergent shocks launched by laser pulses at the edge of a plasma sphere, with the plasma itself formed as a result of laser-driven compression and relaxation of a surrogate plastic-foam ball target. Three x-ray diagnostics, namely, 1-D spa- tially resolved self-emission streaked imaging, 2-D self-emission framed imaging, and backlighting radiography, have shown good agreement with the predicted evolution of the DS and its stability to low-mode perturbations introduced by laser irradiation and target asymmetries.File | Dimensione | Formato | |
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