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Density and X-ray emission profile relationships in highly ionized high-Z laser-produced plasmas

Yoshida, Kensuke*; Fujioka, Shinsuke*; Higashiguchi, Takeshi*; Ugomori, Teruyuki*; Tanaka, Nozomi*; Kawasaki, Masato*; Suzuki, Yuhei*; Suzuki, Chihiro*; Tomita, Kentaro*; Hirose, Ryoichi*; Ejima, Takeo*; Ohashi, Hayato*; Nishikino, Masaharu; Sunahara, Atsushi*; Li, B.*; Dunne, P.*; O'Sullivan, G.*; Yanagida, Tatsuya*; Azechi, Hiroshi*; Nishimura, Hiroaki*

We present a benchmark measurement of the electron density profile in the region where the electron density is 10$$^{19}$$ cm$$^{-3}$$ and where the bulk of extreme ultraviolet (EUV) emission occurs from isotropically expanding spherical high-Z gadolinium plasmas. It was found that, due to opacity effects, the observed EUV emission is mostly produced from an underdense region. We have analyzed time-resolved emission spectra with the aid of atomic structure calculations, and find that while the multiple ion charge states around 18+ during the laser pulse irradiation.

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Category:Physics, Applied

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