On characterization of shock propagation and radiative preheating in x-ray driven high-density carbon foils

被引:1
|
作者
Mishra, Gaurav [1 ]
Ghosh, Karabi [1 ]
机构
[1] Bhabha Atom Res Ctr, Theoret Phys Sect, Mumbai 400085, India
关键词
EQUATION-OF-STATE; INERTIAL CONFINEMENT FUSION; PHYSICS BASIS; IGNITION; TEMPERATURE; HOT; IMPLOSIONS; BERYLLIUM; MODEL; CODE;
D O I
10.1063/5.0141980
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Recently, much effort has been dedicated to the high-density carbon ablator coated fuel capsule in indirect drive inertial confinement fusion experiments due to its higher density compared to other ablators. By using detailed radiation hydrodynamic simulations over a broad range of drive and target parameters, a thorough analysis is performed on shock speed, shock breakout, and maximum preheating temperature in pure and tungsten doped high density carbon foils. The ablators are irradiated by a non-equilibrium x-ray temperature drive consisting of the usual Planckian plus an additionally imposed Gaussian distribution lying in the high frequency M-band region of the incident spectrum. All variables have shown a complex interdependence on strength of the drive, its spectral distribution, and the thickness of the target. Maximum preheating temperature, an important parameter in designing experiments, reduces up to 34% for thicker high-density carbon (HDC) foils, whereas a mere 0.44% doping of tungsten in pure HDC is able to reduce preheating up to 17% for extreme drive conditions. The results are explained on the basis of variation of average albedo/wall loss behavior in foils, an outcome of the interplay between total extinction coefficient and spectral intensity variation with photon energy. For a better understanding and comparison among different types of ablators, multi-parameter scaling relations are proposed for above-mentioned variables, which govern the dynamics of shock propagation and preheating phenomena in HDC based foils.
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页数:20
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