Quasi-monochromatic field-emission x-ray source

被引：19
作者：
Diop, Babacar [1 ]
Vu Thien Binh [1 ]
机构：
[1] Univ Lyon 1, LPMCN, F-69622 Villeurbanne, France
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2012年 / 83卷 / 09期
关键词：
FOAM-LIKE ARRANGEMENT; CARBON NANOPEARLS; CATHODES; TUBE; NANOTUBES; RADIATION; SPECTRA; ARRAYS; ENERGY;
D O I：
10.1063/1.4752406
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
By favoring the L-peak emission over the bremsstrahlung part, direct quasi-monochromatic soft x-ray emission has been obtained with a field emission (FE) x-ray source. The electron impact x-ray setup uses an arrayed cathode of carbon nanopearl FE tips as a stable cold electron source within a vacuum of 10(-6)-10(-7) Torr. The high brightness of the FE e-beam coupled with the array structure of the cold cathode allows a smoother control of the x-ray emission intensity. The wavelength of the x-ray source can be modified by the choice of target materials. Using Mo as the target material, the x-ray emission shows a peak centered at 2.45 keV with a monochromaticity between 75% and 55% and a FWHM in the range of 450 eV. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752406]
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