An improved view-factor method including plasma filling for angular distribution of radiation temperature from a laser-driven hohlraum

Longfei JING (景龙飞); Shaoen JIANG (江少恩); Longyu KUANG (况龙钰); Lu ZHANG (张璐); Jianhua ZHENG (郑建华); Liling LI (李丽灵); Zhiwei LIN (林雉伟); Hang LI (黎航); Tianxuan HUANG (黄天晅); Yunbao HUANG (黄运保)

doi:10.1088/2058-6272/ab9a25

Plasma Science and Technology > 2020 > 22(10): 105202. > DOI: 10.1088/2058-6272/ab9a25

Longfei JING (景龙飞), Shaoen JIANG (江少恩), Longyu KUANG (况龙钰), Lu ZHANG (张璐), Jianhua ZHENG (郑建华), Liling LI (李丽灵), Zhiwei LIN (林雉伟), Hang LI (黎航), Tianxuan HUANG (黄天晅), Yunbao HUANG (黄运保). An improved view-factor method including plasma filling for angular distribution of radiation temperature from a laser-driven hohlraum[J]. Plasma Science and Technology, 2020, 22(10): 105202. DOI: 10.1088/2058-6272/ab9a25

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An improved view-factor method including plasma filling for angular distribution of radiation temperature from a laser-driven hohlraum

¹ Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China
² Mechatronics School of Guangdong University of Technology, Guangzhou 510080, People's Republic of China

Funds: This work was supported by National Natural Science Foundation of China (Nos. 11775204, 11805186, 11805187) and Presidential Foundation of China Academy of Engi- neering Physics (No. YZJJLX2018011).

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Received Date: February 22, 2020
Revised Date: June 04, 2020
Accepted Date: June 04, 2020

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Abstract

Abstract

Angular distribution of radiation temperature from a laser-driven hohlraum is vital for investigations on the radiation field inside the hohlraum, code validation, and predication of drive on the capsule in indirect-drive inertial confinement fusion. A modified version of the view-factor method including plasma filling is proposed, which improves the accuracy of the description of angular distribution of radiation temperature. Firstly, the radial velocity of the gold bubble motion is scaled from a simple data-based model in a gas-filled hohlraum experiment performed on a hundreds of kJ laser facility in China. Then, an equivalent radiative volume model is advanced to approximately characterize the contribution of the blow-off bubble in the new view-factor method incorporate into IRAD3D. The simulation shows reasonable agreement with experimental measurements in a gas-filled hollow hohlraum. Furthermore, the influence of the electron density and temperature distribution, and bubble velocity, is analyzed. The value of the method is that it can be used as an approximate 'first-look' at hohlraum energy balance prior to a more detailed radiation hydrodynamic modeling.
- inertial confinement fusion,
- angular distribution of radiation temperature,
- view-factor,
- plasma filling,
- bubble motion

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References (58)

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