Self-generated magnetic field in ablative Rayleigh-Taylor instability
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发表刊物：Physics of Plasmas
摘要：Self-generated magnetic fields in single-mode ablative Rayleigh-Taylor instability(ARTI) relevant to the acceleration phase of inertial confinement fusion (ICF) implosions are studied via two dimensional simulations. $\sim 100$ Tesla magnetic fields can be generated in ARTI via the Biermann battery source without considering the Nernst effect. The Nernst effect significantly compresses the magnetic field against the electron temperature gradient and amplifies the peak value by more than three times. A scaling law for the magnetic flux is obtained and it well predicts the evolution of the magnetic field from linear to deeply nonlinear phases of ARTI. The self-generated magnetic field reduces the ablation near the spike and reduces width of bubble by magnetizing the electron heat flows, which results in higher magnitude vorticity inside the bubble and enhances the nonlinear ARTI bubble penetration velocity for short-wavelength modes. The bubble velocity boosting due to self-generated magnetic field indicates larger impact of the short-wavelength ARTI modes on ICF implosion performance than previously expected.
合写作者：李俊,信靖飞,万振华,张桦森,郑坚
第一作者：张德华
论文类型：期刊论文
通讯作者：闫锐
论文编号：doi: 10.1063/5.0092234
学科门类：理学
卷号：29
页面范围：072702
是否译文：否
发表时间：2022-07-01
收录刊物：SCI
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