Time-Resolved Interferometric Measurements of Plasma Density Evolution in Laser-Driven Capacitor-Coil Targets
Abstract
Laser-driven capacitor-coil targets provide a compact platform for generating strong magnetic fields and are widely used in magnetized high-energy-density plasma experiments. In addition to magnetic-field generation, these targets also produce plasma in the coil region, which can influence the subject physical processes, interact with secondary targets or external plasmas in their applications. However, direct, time-resolved measurements of the plasma density surrounding the coil remain limited. Here, we report interferometric measurements of the plasma density evolution in laser-driven capacitor-coil targets irradiated by the University of Osaka LFEX laser. Two-dimensional electron density maps reveal two distinct plasma sources loading the coil region: plasma generated in the coil itself and plasma produced by laser ablation of the target plates. These results provide quantitative information on plasma loading and evolution in capacitor-coil targets and are directly relevant to the design and modeling of magnetized high-energy-density plasma experiments.
Keywords
Cite
@article{arxiv.2601.23271,
title = {Time-Resolved Interferometric Measurements of Plasma Density Evolution in Laser-Driven Capacitor-Coil Targets},
author = {Yang Zhang and Ryo Omura and Rinya Akematsu and King Fai Farley Law and Brandon K. Russell and Geoffrey Pomraning and Kian Orr and Kai Kimura and Muhammad Fauzan Syahbana and Yuga Karaki and Hiroki Matsubara and Ryuya Yamada and Jinyuan Dun and Ryunosuke Takizawa and Yasunobu Arikawa and Tatiana Pikuz and Yuji Fukuda and Lan Gao and Hantao Ji and Shinsuke Fujioka},
journal= {arXiv preprint arXiv:2601.23271},
year = {2026}
}