310 / 2023-04-26 14:25:45

Wave and turbulent magnetic field measurements in laser-produced plasmas with ion radiography using solid-state nuclear track detectors and informatics

laboratory astrophysics,,ion acceleration,magnetic field,instabilities,machine learning

辐射和流体力学 > 高能量密度科学与温稠密物质-I

We have experimentally investigated space and astrophysical phenomena using high-power lasers, such as collisionless shocks [1,2] and magnetic reconnections [3,4]. Magnetic fields in the universe as well as in laboratory plasmas are an essential factor governing the phenomena, yet it is challenging to measure the vector magnetic field in three dimensions. Ion radiography is a standard diagnostics for magnetic field measurement in laboratory plasmas. We use graphene and solid-state nuclear track detectors as a target and detectors, respectively, for laser-driven ion beams [5,6]. By implementing machine learning on ion pit analyses, we obtain a number of ion data to reconstruct vector electric and magnetic fields in three dimensions in laser-produced plasmas.

[1] Y. Kuramitsu et al., Phys. Rev. Lett., 106, 175002 (2011).

[2] Y. Kuramitsu et al., Phys. Rev. Lett., 108, 195004 (2012).

[3] Y. Kuramitsu et al., Nat. Commun., 9, 5109 (2018).

[4] K. Sakai et al., Sci. Rep., 12, 10921 (2022).

[5] Y. Kuramitsu et al., Sci. Rep., 12, 2346 (2022).

[6] T. Hihara et al., Sci. Rep., 11, 16283 (2021)