| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Successive Picket Drive for Mitigating the Ablative Richtmyer–Meshkov Instability |
| Meng Li1**, Wen-Hua Ye1,2** |
1Institute of Applied Physics and Computational Mathematics, Beijing 100094
2Center for Applied Physics and Technology, HEDPS, Peking University, Beijing 100871
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| Cite this article: |
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Meng Li, Wen-Hua Ye 2019 Chin. Phys. Lett. 36 025201 |
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Abstract The ablative Richtmyer–Meshkov instability (ARMI) is crucial to the successful ignition implosion of the inertial confinement fusion (ICF) because of its action as the seed of the Rayleigh–Taylor instability. In usual ICF implosions, the first shock driven by various foots of the pulses plays a central role in the ARMI growth. We propose a new scheme for refraining from ARMI with a pulse of successive pickets. With the successive-picket pulse design, a rippled capsule surface is compressed by three successive shocks with sequentially strengthening intensities and ablated stabilization, and the ablative Richtmyer–Meshkov growth is mitigated quite effectively. Our numerical simulations and theoretical analyses identify the validity of this scheme.
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Received: 14 September 2018
Published: 22 January 2019
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| PACS: |
52.57.Fg
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(Implosion symmetry and hydrodynamic instability (Rayleigh-Taylor, Richtmyer-Meshkov, imprint, etc.))
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52.57.-z
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(Laser inertial confinement)
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47.20.-k
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(Flow instabilities)
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52.50.Lp
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(Plasma production and heating by shock waves and compression)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11675026, 11875091 and 11575034. |
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