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

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

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Abstract

We present a benchmark measurement of the electron density profile in the region where the electron density is 1019cm-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 the multiple ion charge states around 18+ during the laser pulse irradiation.

Original languageEnglish
Article number121109
JournalApplied Physics Letters
Volume106
Issue number12
DOIs
Publication statusPublished - Mar 23 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Yoshida, K., Fujioka, S., Higashiguchi, T., Ugomori, T., Tanaka, N., Kawasaki, M., Suzuki, Y., Suzuki, C., Tomita, K., Hirose, R., Ejima, T., Ohashi, H., Nishikino, M., Sunahara, A., Li, B., Dunne, P., O'Sullivan, G., Yanagida, T., Azechi, H., & Nishimura, H. (2015). Density and x-ray emission profile relationships in highly ionized high- Z laser-produced plasmas. Applied Physics Letters, 106(12), [121109]. https://doi.org/10.1063/1.4916395