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

被引：7

作者：

Tamura, Toshiki ^{[1
]}

Arai, Goki ^{[1
]}

Kondo, Yoshiki ^{[1
]}

Hara, Hiroyuki ^{[1
]}

Hatano, Tadashi ^{[2
]}

Ejima, Takeo ^{[2
]}

Jiang, Weihua ^{[3
]}

Suzuki, Chihiro ^{[4
]}

O'Sullivan, Gerry ^{[5
]}

Higashiguchi, Takeshi ^{[1
]}

机构：

[1] Utsunomiya Univ, Fac Engn, Dept Elect & Elect Engn, Yoto 7-1-2, Utsunomiya, Tochigi 3218585, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[3] Nagaoka Univ Technol, Dept Elect Engn, Nagaoka, Niigata 9402188, Japan

[4] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[5] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland

来源：

OPTICS LETTERS | 2018年 / 43卷 / 09期

基金：

日本学术振兴会;

关键词：

EXTREME-ULTRAVIOLET EMISSION; REPETITION-RATE; THIN-DISK; AMPLIFICATION; OPERATION; CLUSTERS; ENERGY;

D O I：

10.1364/OL.43.002042

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 x 10(13) photons/sr at a laser power density of 1.2 x 10(14) W/cm(2). (C) 2018 Optical Society of America

引用

页码：2042 / 2045

页数：4

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