5–20 keV laser-induced x-ray generation at 1 kHz from a liquid-jet target
作者:
R. J. Tompkins,
I. P. Mercer,
M. Fettweis,
C. J. Barnett,
D. R. Klug,
Lord G. Porter,
I. Clark,
S. Jackson,
P. Matousek,
A. W. Parker,
M. Towrie,
期刊:
Review of Scientific Instruments
(AIP Available online 1998)
卷期:
Volume 69,
issue 9
页码: 3113-3117
ISSN:0034-6748
年代: 1998
DOI:10.1063/1.1149120
出版商: AIP
数据来源: AIP
摘要:
We report ultrashort pulse, 1 kHz repetition rate x-ray generation in the 5–20 keV spectral region, induced by the interaction of laser radiation with copper nitrate solution and ethylene glycol liquid-jet targets. The characteristics of the copper nitrate source are relevant for application to time-resolved x-ray diffraction studies as well as for spectroscopic x-ray absorption studies. The x-ray sources were operated uninterrupted for in excess of 5 h with no detectable buildup of debris on the associated optics. The x-ray flux generated by both sources is estimated to be of the order of106 photons s−1 sr−1in the 5–20 keV region. The spectra have been measured with both a PIN photodiode, and with transmission measurements taken using aluminum filters. We find that the plasma emission has a broadband component attributed to bremsstrahlung emission, with the bulk of the x-ray emission emitted from the chamber lying between 5 and 20 keV for both sources. The copper nitrate emission, however, delivers a dominant emission peak at 9 keV, attributed to the characteristic K emission of copper. ©1998 American Institute of Physics.
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