| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Scaling of rise time of drive current on development of magneto-Rayleigh-Taylor instabilities for single-shell Z-pinches |
| Xiaoguang Wang(王小光), Guanqiong Wang(王冠琼), Shunkai Sun(孙顺凯), Delong Xiao(肖德龙)†, Ning Ding(丁宁), Chongyang Mao(毛重阳), and Xiaojian Shu(束小建) |
| Institute of Applied Physics and Computational Mathematics, Beijing 100094, China |
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Abstract In fast Z-pinches, rise time of drive current plays an important role in development of magneto-Rayleigh-Taylor (MRT) instabilities. It is essential for applications of Z-pinch dynamic hohlraum (ZPDH), which could be used for driving inertial confinement fusion (ICF), to understand the scaling of rise time on MRTs. Therefore, a theoretical model for nonlinear development of MRTs is developed according to the numerical analysis. It is found from the model that the implosion distance L=r0-rmc determines the development of MRTs, where r0 is the initial radius and rmc is the position of the accelerating shell. The current rise time τ would affect the MRT development because of its strong coupling with the r0. The amplitude of MRTs would increase with the rise time linearly if an implosion velocity is specified. The effects of the rise time on MRT, in addition, are studied by numerical simulation. The results are consistent with those of the theoretical model very well. Finally, the scaling of the rise time on amplitude of MRTs is obtained for a specified implosion velocity by the theoretical model and numerical simulations.
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Received: 19 April 2021
Revised: 22 July 2021
Accepted manuscript online: 22 August 2021
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PACS:
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52.57.Fg
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(Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.))
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52.59.Qy
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(Wire array Z-pinches)
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52.30.Cv
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(Magnetohydrodynamics (including electron magnetohydrodynamics))
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 11975057, 11605013,11775023, and 11705013). |
Corresponding Authors:
Delong Xiao
E-mail: xiao_delong@iapcm.ac.cn
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Cite this article:
Xiaoguang Wang(王小光), Guanqiong Wang(王冠琼), Shunkai Sun(孙顺凯), Delong Xiao(肖德龙), Ning Ding(丁宁), Chongyang Mao(毛重阳), and Xiaojian Shu(束小建) Scaling of rise time of drive current on development of magneto-Rayleigh-Taylor instabilities for single-shell Z-pinches 2022 Chin. Phys. B 31 025203
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