Open AccessEfficient multi-keV x-ray generation from a high-Z target irradiated with a clean ultra-short laser pulse
Author(s) -
Zhe Zhang,
Masaharu Nishikino,
Hiroaki Nishimura,
Tetsuya Kawachi,
Alexander S. Pirozhkov,
A. Sagisaka,
Satoshi Orimo,
Koichi Ogura,
Akifumi Yogo,
Yasuaki Okano,
S. Ohshima,
Shinsuke Fujioka,
Hiromitsu Kiriyama,
Kiminori Kondo,
Takuya Shimomura,
S. Kanazawa
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.004560
Subject(s) - irradiation , laser , materials science , optics , femtosecond , pulse (music) , x ray , range (aeronautics) , analytical chemistry (journal) , chemistry , physics , chromatography , detector , nuclear physics , composite material
Kα line emissions from Mo and Ag plates were experimentally studied using clean, ultrahigh-intensity femtosecond laser pulses. The absolute yields of Kα x-rays at 17 keV from Mo and 22 keV from Ag were measured as a function of the laser pulse contrast ratio and irradiation intensity. Significantly enhanced Kα yields were obtained for both Mo and Ag by employing high contrast ratios and irradiances. Conversion efficiencies of 4.28×10⁻⁵/sr for Mo and 4.84×10⁻⁵/sr for Ag, the highest values obtained to date, were demonstrated with contrast ratios in the range 10⁻¹⁰ to 10⁻¹¹.