Abstract
The setup based on a moderate energy linear accelerator (linac) is proposed to provide users with a tunable, quasi-monochromatic, linearly polarized X-ray beam. The effect of parametric X-ray radiation (PXR) from relativistic electrons in a crystal is used in an X-ray source. The application of the setup for calibration of X-ray space telescopes and other equipment is considered. The setup allows calibration of angular, spectral, polarization parameters of telescopes with smooth tuning of X-ray energy from several keV to hundreds of keV. Estimates of X-ray flux intensities and spectral line widths on the telescope aperture at a distance of several hundred meters are presented. Besides, the PXR-based facility for simultaneous generation of several X-ray beams is proposed.
Highlights
Following ®rst theoretical predictions [1,2], the parametric X-ray radiation (PXR) was observed experimentally in 1985 [3]
We propose a scheme of experimental setup for wide-range tuning of spectral peak energy in a ®xed PXR reection
The angular part of the PXR reection passing through vacuum tube collimators can provide an X-ray beam diameter up to about 2 m at the end of the beamline
Summary
Following ®rst theoretical predictions [1,2], the parametric X-ray radiation (PXR) was observed experimentally in 1985 [3]. The PXR is a quasi-monochromatic linearly polarized X-ray radiation generated by a relativistic charged particle moving through a crystal. The PXR spectral peak has been observed at energies from several keV up to about 400 keV. The PXR properties allow one to consider this radiation as an alternative to a synchrotron source of a hard X-ray beam, especially at energies higher than a few tens of keV [11]. The PXR spectral peak energy can be smoothly tuned by simple rotation of a crystal radiator placed in the particle beam. The direction of maxima in the angular PXR yield distribution changes relative to the particle beam as the X-ray energy is tuned. We propose a scheme of experimental setup for wide-range tuning of spectral peak energy in a ®xed PXR reection. We propose the scheme of a multi-X-ray beam facility that can be used for various applications
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