Hot-electron deposition and implosion mechanisms within electron shock ignition*

Shang, Wanli; Che, Xingsen; Sun, Ao; Du, Huabing; Gao, Yang; Wei, M.; Hou, Lifei; Yang, Yimeng; Zhang, Wenhai; Tu, Shaoyong; Wang, Feng; He, Hongliang; Yang, Jiamin; Jiang, Shaoen; Zhang, Baohan

doi:10.1088/1674-1056/aba9c3

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…[4] Motivated by the shock ignition research, one studied the ablation process driven by electrons theoretically and numerically, and also the processes of the shock formation with the irradiation of hot electron beam. [4][5][6][7] As is well known, the transport of hot electrons in the ICF is an integrated problem due to the coupling of different physical processes. To simulate such processes, hot electron transport and energy deposition in the background plasma, given by hydrodynamic computation, should be investigated, then the deposited energy of hot electrons is needed to couple with the hydrodynamic evolution.…”

Section: Introductionmentioning

confidence: 99%

Simulations of hot electron transport in radiation-ablated plasma

et al. 2023

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The transport of hot electrons in inertial confinement fusion (ICF) is integrated problem due to the coupling of hydrodynamic evolution. Here a hot electron transport code is developed and coupled to the radiation hydrodynamic code MULTI1D. Using the code, the hot electron beam slowing-down and ablation processes are simulated. The ablation pressure scaling law of hot electron beams is confirmed in our simulations. We attempt to simulate the hot electron transport in the condition of indirect drive ICF, where the spatial profile of hot electron energy deposition is presented around the compressed region. It is shown the hot electron can prominently increase the total ablation pressure in the early phase of radiation-ablated plasmas. So, our studies suggest a potential driven asymmetry mechanism may occur due to irradiation of asymmetry energetic hot electron beam. The possible degradation from the hot electron transport and preheating is also discussed.

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Section: Introductionmentioning

confidence: 99%

Simulations of hot electron transport in radiation-ablated plasma

et al. 2023

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Solutions of several theory and technique problems in high-space-resolving hotspot electron temperature diagnosis techniques in inertial confinement fusion

et al. 2022

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In implosion experiments, bremsstrahlung radiation ratios of broad-energy-band x-ray emission intensities (sampled by Ross pair) and narrow-energy-band x-ray emission intensities (sampled by multilayer) are typically used to extract the hotspot electron temperature. The latter method could potentially be more accurate because it does not require any additional theoretical arithmetic. However, the boundary conditions of the energy band, drastic influence on the measured electron temperature resulting from response differences of recording devices in the energy band, evident impact from uncertainties of the detector aiming, and coordinate interrelations for the two narrow-energy-band x-ray images have not been explored. These problems should be overcome to obtain the accurate hotspot electron temperature using the narrow-energy-band x-ray emission intensities method. This study solves the problems indicated above by exploring a diagnosis technique to extract the accurate hotspot electron temperature. In particular, we determine that the effect of the response differences and uncertainties could be ignored when the width of the sampled narrow energy band is approximately ±0.5 keV in the linear spectrum response regions of the imaging plate, and the reflectivity of the multilayer is uniform and constant in that energy band and the viewing field of the detector (≥±110 µm). This study is the first to consider the linear spectrum response of the imaging plate in different energy regions, eliminating the effect of the response differences. Finally, the maximal emission intensities in the two recorded-energy-band x-ray images can be used for coordinate interrelation.

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Hot-electron deposition and implosion mechanisms within electron shock ignition*

Cited by 2 publications

References 31 publications

Simulations of hot electron transport in radiation-ablated plasma

Simulations of hot electron transport in radiation-ablated plasma

Solutions of several theory and technique problems in high-space-resolving hotspot electron temperature diagnosis techniques in inertial confinement fusion

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