Generation of Highly Charged Au Ion in Laser-Produced Plasma for Water Window X-ray Radiation Sources

Jiahao Wang; Maki Kishimoto; Tomoyuki Johzaki; Kairi Mizushima; Chihiro Kumeda; Takeshi Higashiguchi; Atsushi Sunahara; Hikari Ohiro; Kotaro Yamasaki; Shinichi Namba

doi:10.3390/atoms10040150

Atoms (Dec 2022)

Generation of Highly Charged Au Ion in Laser-Produced Plasma for Water Window X-ray Radiation Sources

Jiahao Wang,
Maki Kishimoto,
Tomoyuki Johzaki,
Kairi Mizushima,
Chihiro Kumeda,
Takeshi Higashiguchi,
Atsushi Sunahara,
Hikari Ohiro,
Kotaro Yamasaki,
Shinichi Namba

Affiliations

Jiahao Wang: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Maki Kishimoto: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Tomoyuki Johzaki: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Kairi Mizushima: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Chihiro Kumeda: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Takeshi Higashiguchi: Department of Electrical and Electronic Engineering, Utsunomiya University, Utsunomiya 321-8505, Japan
Atsushi Sunahara: Center for Material under Extreme Environment, Purdue University, West Lafayette, IN 47907, USA
Hikari Ohiro: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Kotaro Yamasaki: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Shinichi Namba: Department of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan

DOI: https://doi.org/10.3390/atoms10040150
Journal volume & issue: Vol. 10, no. 4
p. 150

Abstract

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Highly charged ions in the plasma produced by high-power laser can radiate bright and short-pulse X-rays. Owing to the unresolved transition array (UTA) from the high-Z elements, laser produced plasma has been applied for developing X-ray sources. In particular, X-rays in the water-window (WW) region (2.3–4.4 nm) is utilized as the light source of the X-ray microscopy to observe living organisms under high contrast and resolution. In this work, WW X-rays radiated from a laser (1064 nm, 6.2 ns) produced Au-plasma has been studied. UTA spectrum in the WW range has been observed through a grazing incident spectrometer (GIS). Dependence of Au-ion charge state distribution on laser intensity has been experimentally investigated and evaluated by a transition probability data calculated by the flexible atomic code. The integrated soft X-ray emission has been observed through a pinhole camera with a 1.0-μm Ti-filter, combined with a 2-D plasma radiation scanning achieved by the GIS. An intense WW emission region 200-μm away from the target surface has been observed, which indicates a more effective area is possible to be utilized for a practical use.

Published in Atoms

ISSN: 2218-2004 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity
Website: http://www.mdpi.com/journal/atoms

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