Simple model of heating and compression of spherical shell targets by high-intensity laser radiation

Андреев, А. А.; Соловьев, Н А

doi:10.1070/qe1985v015n04abeh006992

Cited by 3 publications

(2 citation statements)

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“…The improved model was more useful than other model in describing density, area density, and ion temperature with the variation of fill gas pressure. Andreev et al [16] provided a unified description of heating and compression regimes, the model predicted results and the experimental data on neutron yield was better than within two orders of magnitude. Kitagawa et al [17] optimized the target for the maximum number of neutrons at a given energy on the Gekko MII two-beam 1.05 µm laser system, showed neutron yield is proportional to the laser power of 2.4 power.…”

Section: Introductionmentioning

confidence: 98%

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A simple analytical model of laser direct-drive thin shell target implosion

Yu¹,

Huang²,

Li³

et al. 2022

Chinese Phys. B

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A high-neutron yield platform imploded by a thin shell target is generally built to probe nuclear science problems, and it has the advantages of high neutron yield, ultrashort fusion time, micro fusion zone, isotropic and monoenergetic neutron. Some analytical models have been proposed to interpret exploding-pusher target implosion driven by a long wavelength laser, whereas they are imperfect for a 0.35 μm laser implosion experiment. When using the 0.35 μm laser, the shell is ablated and accelerated to high implosion velocity governed by Newton’s law, ablation acceleration and quasi-adiabatic compression models are suitable to explain the implosion of a laser direct-drive thin shell target. The new analytical model scales bang time, ion temperature and neutron yield for large variations in laser power, target radius, shell thickness, and fuel pressure. The predicted results of the analytical model are in agreement with experimental data on the Shenguang-III prototype laser facility, 100 kJ laser facility, Omega, and NIF, it demonstrates that the analytical model benefits the understanding of experiment performance and optimizing the target design of high neutron yield implosion.

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Section: Introductionmentioning

confidence: 98%

“…These existing analytical models [12][13][14][15][16][17][18] have been properly used to interpret thin shell glass target implosion with a long wavelength laser (λ ≥ 0.53 µm). While the high intensity, long wavelength laser interacts with glass, resonance absorption is important [19] and the electrons are preferentially heated.…”

Section: Introductionmentioning

confidence: 99%