Preliminary study on a tetrahedral hohlraum with four half-cylindrical cavities for indirectly driven inertial confinement fusion

Jing, Longfei; Jiang, Shaoen; Kuang, Longyu; Zhang, Lu; Li, Liling; Zhang, Lin; Li, Hang; Zheng, Jianhua; Hu, Feng; Huang, Yunbao; Huang, Tianxuan; Ding, Yongkun

doi:10.1088/1741-4326/aa5b43

Cited by 9 publications

(8 citation statements)

References 57 publications

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“…The maximum output laser energy is 8 kJ/1 ns and 18 kJ/3 ns. The configuration is shown in figure 2 (layout was proposed by IRAD3D code [45,46]). A two-LEH spherical hohlraum is employed.…”

Section: Experimental Configuration and Diagnosticsmentioning

confidence: 99%

The investigation of spherically convergent plasma fusion as a high-flux neutron source with a long-pulsed laser driving

Yan¹,

Ren²,

Chen³

et al. 2022

Nucl. Fusion

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The spherically convergent plasma fusion (SCPF) scheme is a robust approach to provide a high-brightness pulsed neutron source. The performance of the SCPF driven by the long-pulsed laser is investigated. The experiments, with the laser pulse duration in a range of 0.5ns to 3ns, were implemented on ShenGuang-II Upgrade facility and a 100kJ level laser facility. The intensity of the laser beam was about multiple 1014W/cm2. The measured D-D reaction neutron yields were in a range of 7.3×108 to 1.01×1011, while the driven laser energies were in a range of 2.1kJ to 100.5kJ. The temporal self-emitted X-ray flux and image were measured. They shew that the plasma core could be maintained for a longer time in the long duration shots. The neutron reaction rate was measured on the 100kJ level laser facility. The full width at half maximum (FWHM) reached about 1ns in the shot with 2ns duration laser. The scaling law of the measured yields respect to the laser power and the pulse duration were presented. The neutron yield was possible to be increased by increasing the power and extending the duration.

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“…The maximum output laser energy is 8 kJ/1 ns and 18 kJ/3 ns. The configuration is shown in figure 2 (layout was proposed by IRAD3D code [45,46]). A two-LEH spherical hohlraum is employed.…”

Section: Experimental Configuration and Diagnosticsmentioning

confidence: 99%

The investigation of spherically convergent plasma fusion as a high-flux neutron source with a long-pulsed laser driving

Yan¹,

Ren²,

Chen³

et al. 2022

Nucl. Fusion

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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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“…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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Preliminary study on a tetrahedral hohlraum with four half-cylindrical cavities for indirectly driven inertial confinement fusion

Cited by 9 publications

References 57 publications

The investigation of spherically convergent plasma fusion as a high-flux neutron source with a long-pulsed laser driving

The investigation of spherically convergent plasma fusion as a high-flux neutron source with a long-pulsed laser driving

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

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

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