We observe experimentally periodic proton beam filamentation in laser-produced dense plasma using multilayered (CH–Al–CH) sandwich targets. The accelerated MeV proton beams from these targets exhibit periodic frozen filaments up to 5–10 µm as a result of resistive Weibel instabilities in the expanding plasma. The evolution of strong self-generated resistive magnetic fields at the targets interface is attributed to such plasma effects, which are supported, by our theory and simulations. We suggest that the resistive Weibel instability could be effectively employed to understand the evolution of magnetic fields in laser-generated plasma in the astrophysics scenario or the advanced fast igniter approach of the inertial confinement fusion.

中文翻译：

---

强激光等离子体中电阻韦伯不稳定性的观察

我们使用多层（CH-Al-CH）夹层靶在激光产生的致密等离子体中观察到实验性的周期性质子束丝状。由于膨胀等离子体中的电阻 Weibel 不稳定性，来自这些目标的加速 MeV 质子束表现出高达 5-10 µm 的周期性冻结细丝。目标界面处强自生电阻磁场的演变归因于这种等离子体效应，我们的理论和模拟支持了这种效应。我们建议可以有效地利用电阻性 Weibel 不稳定性来了解天体物理学场景中激光产生的等离子体中磁场的演变或惯性约束聚变的先进快速点火器方法。