Selection of target elements for laser-produced plasma soft x-ray sources

Toshiki Tamura; Goki Arai; Yoshiki Kondo; Hiroyuki Hara; Tadashi Hatano; Takeo Ejima; Weihua Jiang; Chihiro Suzuki; Gerry O’Sullivan; Takeshi Higashiguchi

doi:10.1364/OL.43.002042

Selection of target elements for laser-produced plasma soft x-ray sources

Toshiki Tamura, Goki Arai, Yoshiki Kondo, Hiroyuki Hara, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Chihiro Suzuki, Gerry O’Sullivan, Takeshi Higashiguchi

Center for Advanced Microscopy and Spectroscopy

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

We demonstrated the upper limitation to the number of shots, i.e., target lifetime, together with the number of photons emitted in the water-window soft x-ray spectral region from a number of targets used as sources in this spectral region, for multi-shot irradiation at the same position on the target surface. The spectra involved result from unresolved transition arrays originating from n 3–n 4 transitions in medium-Z element plasmas and from n 4–n 4 transitions originating in high-Z plasmas. The output flux was maintained for the highest number of shots in the case of the high melting point element molybdenum, and the total output in the water window was 7.7 × 10¹³ photons∕sr at a laser power density of 1.2 × 10¹ W∕cm².

Original language	English
Pages (from-to)	2042-2045
Number of pages	4
Journal	Optics Letters
Volume	43
Issue number	9
DOIs	https://doi.org/10.1364/OL.43.002042
Publication status	Published - 2018 May 1

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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Tamura, T., Arai, G., Kondo, Y., Hara, H., Hatano, T., Ejima, T., Jiang, W., Suzuki, C., O’Sullivan, G., & Higashiguchi, T. (2018). Selection of target elements for laser-produced plasma soft x-ray sources. Optics Letters, 43(9), 2042-2045. https://doi.org/10.1364/OL.43.002042

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title = "Selection of target elements for laser-produced plasma soft x-ray sources",

abstract = "We demonstrated the upper limitation to the number of shots, i.e., target lifetime, together with the number of photons emitted in the water-window soft x-ray spectral region from a number of targets used as sources in this spectral region, for multi-shot irradiation at the same position on the target surface. The spectra involved result from unresolved transition arrays originating from n 3–n 4 transitions in medium-Z element plasmas and from n 4–n 4 transitions originating in high-Z plasmas. The output flux was maintained for the highest number of shots in the case of the high melting point element molybdenum, and the total output in the water window was 7.7 × 1013 photons∕sr at a laser power density of 1.2 × 101 W∕cm2.",

author = "Toshiki Tamura and Goki Arai and Yoshiki Kondo and Hiroyuki Hara and Tadashi Hatano and Takeo Ejima and Weihua Jiang and Chihiro Suzuki and Gerry O{\textquoteright}Sullivan and Takeshi Higashiguchi",

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AU - Tamura, Toshiki

AU - Arai, Goki

AU - Kondo, Yoshiki

AU - Hara, Hiroyuki

AU - Hatano, Tadashi

AU - Ejima, Takeo

AU - Jiang, Weihua

AU - Suzuki, Chihiro

AU - O’Sullivan, Gerry

AU - Higashiguchi, Takeshi

PY - 2018/5/1

Y1 - 2018/5/1

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AB - We demonstrated the upper limitation to the number of shots, i.e., target lifetime, together with the number of photons emitted in the water-window soft x-ray spectral region from a number of targets used as sources in this spectral region, for multi-shot irradiation at the same position on the target surface. The spectra involved result from unresolved transition arrays originating from n 3–n 4 transitions in medium-Z element plasmas and from n 4–n 4 transitions originating in high-Z plasmas. The output flux was maintained for the highest number of shots in the case of the high melting point element molybdenum, and the total output in the water window was 7.7 × 1013 photons∕sr at a laser power density of 1.2 × 101 W∕cm2.

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