Pearcy Jacob A, Sutcliffe Graeme D, Johnson Timothy M, Reichelt Benjamin L, Dannhoff Skylar G, Lawrence Yousef, Frenje Johan, Gatu-Johnson Maria, Petrasso Rich D, Li Chikang
Appl Opt. 2024 Apr 1;63(10):A98-A105. doi: 10.1364/AO.506985.
A more complete understanding of laser-driven hohlraum plasmas is critical for the continued development and improvement of ICF experiments. In these hohlraums, self-generated electric and magnetic fields can play an important role in modifying plasma properties such as heat transport; however, the strength and distribution of electromagnetic fields in such hohlraums remain largely uncertain. To explore this question, we conducted experiments at the OMEGA laser facility, using monoenergetic proton radiography to probe laser-driven vacuum hohlraums. We then utilized reconstructive methods to recover information about proton deflections. To interpret these reconstructions, a new technique for detangling the contributions of electric and magnetic fields to proton deflections was developed. This work was supported in part by the U.S. Department of Energy, the National Laser Users' Facility, and the Laboratory for Laser Energetics.
对激光驱动的黑腔等离子体有更全面的理解对于惯性约束聚变（ICF）实验的持续发展和改进至关重要。在这些黑腔中，自生电场和磁场在改变诸如热输运等等离子体特性方面可能发挥重要作用；然而，此类黑腔中电磁场的强度和分布在很大程度上仍不确定。为探究这个问题，我们在欧米茄激光装置上进行了实验，使用单能质子射线照相术来探测激光驱动的真空黑腔。然后我们利用重建方法来获取有关质子偏转的信息。为了解释这些重建结果，开发了一种新的技术来区分电场和磁场对质子偏转的贡献。这项工作部分得到了美国能源部、国家激光用户设施和激光能量学实验室的支持。
