W. MONDELAERS*, B. MASSCHAELE*, P. CAUWELS*, M. DIERICK*, J. JOLIE **, S. BAECHLER** T. MATERNA**
In an increasing range of research fields there is a strong demand of high-intensity tunable monochromatic X-ray sources. Synchrotron radiation has proven to be the brightest source in the VUV and soft X-ray region. A promising new approach for the production of tunable high-intensity monochromatic beams in the hard X-ray region is the use of electron accelerators of moderate energy (10 MeV range). We developed at the 15 MeV linear electron accelerator of the Ghent University a monochromatic X-ray source with a resolution better than 0.1%, tunable in the energy region between 60 and 700 keV. The original concept is based on the monochromatization of a broad bremsstrahlung spectrum produced with a high-intensity electron beam, by Bragg-Laue diffraction on a curved single-crystal and focussing through a slit system. The intensity of the monochromatic beams is highly dependent on the quality of the high-power beams delivered by the electron accelerator. The design, construction, performance and some applications of the source are described in detail.
* Department of Subatomic Radiation Physics, Ghent University, Proeftuinstraat 86, B-9000 Gent, Belgium
** Physics Department, University of Fribourg, PHrolles, CH-1700 Fribourg, Switzerland
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