We examine the anomalous absorption effect due to ion–acoustic turbulence (IAT) driven by the return current instability in a plasma corona in relation to relevant conditions of the direct-drive inertial confinement fusion scheme of the Russian megajoule-energy level laser facility. We find that for the plasma corona created by a carbon ablator, the IAT contributes not more than 10% to absorption for intensities ≳ 7 × 10¹⁴ W/cm² at second-harmonic radiation.

中文翻译：

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回路电流不稳定导致吸收异常

我们研究了由等离子体电晕中返回电流的不稳定性所驱动的离子声湍流（IAT）引起的反常吸收效应，该异常与俄罗斯兆焦耳能级激光设备的直接驱动惯性约束聚变方案的相关条件有关。我们发现，对于由碳烧蚀剂产生的等离子体电晕，在二次谐波辐射下，IAT对absorption 7×10 ¹⁴ W / cm ²强度的吸收贡献不超过10％。