A unified modeling approach for physical experiment design and optimization in laser driven inertial confinement fusion

Li, Haiyan; Huang, Yunbao; Jiang, Shaoen; Jing, Longfei; Huang, Tianxuan; Ding, Yongkun

doi:10.1016/j.fusengdes.2015.08.011

Cited by 17 publications

(11 citation statements)

References 28 publications

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“…In this campaign, all 48 laser beams were injected into the cylindrical hohlraum. The configurations of the laser beams are shown in figure 2(a) (the layout was simulated by the IRAD3D program [61][62][63]). The laser beams were arranged with four cone angles with respect to the hohlrum axis: 8 beams at 28.5 • , 8 beams at 35 • , 16 beams at 49.5 • and 16 beams at 55 • .…”

Section: Experimental Configuration and Diagnosticsmentioning

confidence: 99%

The influence of driven asymmetry on yield degradation in shaped-pulse indirect-drive implosion experiments at the 100 kJ laser facility

et al. 2020

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The influence of low-mode-driven asymmetry on yield degradation in shaped-pulse indirect-drive implosions has been investigated at the 100 kJ laser facility. In this work, P2- and P4-driven asymmetries were tuned by varying hohlraum gas-fill density and capsule diameter. The measured neutron yield varied from 2.1 × 109 to 7.6 × 109 and the yield measured by a 1D simulation (YOC1D) was increased from 3% to 16%. Meanwhile, considering the temporal P2- and P4-driven asymmetries, the yields measured by 2D simulations (YOC2D) were from 26% to 81% (the YOC2D of the majority of the shots was higher than 50%). Furthermore, both the ion temperature and neutron bang-time showed good agreement between the measurements and the 2D simulations. The simulations demonstrated that the temporal P2- and P4-driven asymmetries can decrease the efficiency of PdV work and increase the energy loss due to electron thermal conduction. In addition, the internal energy of the deuterium (DD) fuel clearly decreased and the neutron yield was degraded by low-mode asymmetry. In a future work, we will enlarge the cylindrical hohlraum diameter or use an I-hohlraum to improve the low-mode-driven symmetry, along with measurement of the hot-spot shape.

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Section: Experimental Configuration and Diagnosticsmentioning

confidence: 99%

The influence of driven asymmetry on yield degradation in shaped-pulse indirect-drive implosion experiments at the 100 kJ laser facility

et al. 2020

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“…where D H is the diameter of the hohlraum (or one of the six ellipses) at the midplane, L H is the length of the hohlraum or the distance between any two opposite LEHs, and D L is the diameter of the 6 LEHs. The area of each segment of the hohlraum is calculated by the view-factor code IRAD3D [31,32]. The CCR (case-to-capsule ratio) in the non-spherical hohlraums, such as the TAEH, is defined as the ratio of the diameter at the midplane of the hohlraum and the capsule, i.e.…”

Section: Hohlraum Configurationmentioning

confidence: 99%

Comparison of three hohlraum configurations with six laser entrance holes for indirect-drive inertial confinement fusion

et al. 2018

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The radiation drive asymmetry and laser-plasma instabilities (LPIs) inside the conventional cylindrical hohlraum configuration are two daunting issues in indirect-drive inertial confinement fusion. Recently, an octahedral spherical hohlraum (SH) (Lan et al 2014 Phys. Plasmas 21 010704), a novel three-axis cylindrical hohlraum (TACH) (Kuang et al 2016 Sci. Rep. 6 34636), and an advanced three-axis elliptical hohlraum (TAEH) (Jing et al 2017 arXiv:1703.01579) with six laser entrance holes (LEHs) were proposed to mitigate these issues. In this paper, the performance of these three new hohlraum configurations is compared. Preliminary simulations indicate that the TAEH (with a case-to-capsule ratio, CCR = 2.8) could provide excellent radiation symmetry, comparable to those inside the SH (CCR = 5.1) and TACH (CCR = 2.2). The filling time of plasma affecting the LPIs is between those of the SH and TACH, and about 1.5 times the one in the ignition hohlraum Rev5-CH (300 eV) of the National Ignition Campaign (Haan et al 2011 Phys. Plasmas 18 051001). The energy coupling efficiency of the TAEH is about 29% and 17% greater than those inside the SH and TACH, respectively. Moreover, all three configurations have robust symmetry with respect to laser beam pointing errors and capsule offset, with the SH being the most insensitive.

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“…The initial driving asymmetry was calculated by IRAD3D [30][31][32]. IRAD3D code is a 3D view-factor code.…”

Section: The Influence Of Radiation Asymmetrymentioning

confidence: 99%

Preliminary experiments on hohlraum-driven double-shell implosion at the ShenGuang-III laser facility

Yan

Zou

et al. 2018

Nucl. Fusion

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Double-shell implosion is proposed as a non-cryogenic target design for ignition, offering a robust implosion platform for inertial confinement fusion research. Hohlraum-driven double-shell implosions have been performed at the ShenGuang-III laser facility; a vacuum hohlraum with a high CCR value was employed. With 96kJ laser energy in a squared temporal profile, the implosion neutron yield was close to 1010, and the YOC1D was about 27%. A fuel areal density of 14 mg cm−2 was inferred from the measured yield ratio of secondary and primary neutrons. The implosion trajectory was diagnosed via the 4.75 keV x-ray backlight. The measured implosion velocity and hot-spot x-ray emission history indicate a predictable hydrodynamic process in the double-shell implosion. Two crucial factors which might detrimentally affect implosion performance are the implosion symmetry and pusher–gas mix. The loss of four driven laser beams in the backlight shot caused the YOC1D to decrease to 5% and fuel areal density to decrease to 4 mg cm−2. In future, optimization of the implosion symmetry and the capsule fabrication will be implemented to improve the double-shell implosion performance.

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A unified modeling approach for physical experiment design and optimization in laser driven inertial confinement fusion

Cited by 17 publications

References 28 publications

The influence of driven asymmetry on yield degradation in shaped-pulse indirect-drive implosion experiments at the 100 kJ laser facility

The influence of driven asymmetry on yield degradation in shaped-pulse indirect-drive implosion experiments at the 100 kJ laser facility

Comparison of three hohlraum configurations with six laser entrance holes for indirect-drive inertial confinement fusion

Preliminary experiments on hohlraum-driven double-shell implosion at the ShenGuang-III laser facility

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