Quasi-monochromatic field-emission x-ray source

Journal Article · Sat Sep 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4752406· OSTI ID:22093740

Diop, Babacar; Binh, Vu Thien ^[1]

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1. LPMCN, University of Lyon 1, Villeurbanne 69622 (France)

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{sup -6}-10{sup -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.

• OSTI ID: 22093740
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 9; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BREMSSTRAHLUNG
BRIGHTNESS
CARBON
ELECTRON BEAMS
ELECTRON SOURCES
ELECTRONS
FIELD EMISSION
MATERIALS
MONOCHROMATIC RADIATION
MONOCHROMATORS
SOFT X RADIATION
WAVELENGTHS
X-RAY SOURCES