Parametric X-rays (PXR) are a new type of X-ray that are generated by crystal-electron interactions. The Laboratory for Electron Beam Research and Application (LEBRA) at Nihon University generates PXR using a double-crystal system generating electrons from a 100-MeV class LINAC. LEBRA-PXR has potential for use as a wavelength tunable, ultra-high bright X-ray source with a macro-/micro-pulse structure. LEBRA-PXR has an energy-dispersion in the horizontal axis, assumed to be 0.2% in the experimental window, but can be used as monochromatic X-ray source for diffraction using a simple slit-system. A diffraction experiment was successfully carried out by applying an 11 keV, or 1.1273 A, LEBRA-PXR. Near-perfect crystals, such as graphite used for a monochromator showed sharp diffraction peaks. Clear, transparent mineral quartz and fluorapatite crystals also showed sharp diffraction peaks, while the diffraction peaks from clear calcite and silicon powder were not detected. Possible reasons for the lack of diffraction peaks from these materials are discussed. LEBRA-PXR has potential for use in studies on the diffraction of other materials, and is therefore, expected to be a useful tool for crystallographic analysis.
[1]
A. V. Shchagin.
Current status of parametric X-ray radiation research
,
2001
.
[2]
A. N. Didenko,et al.
Observation of monochromatic X-ray radiation from 900 MeV electrons transmitting through a diamond crystal
,
1985
.
[3]
W. Bragg,et al.
The Structure of Some Crystals as Indicated by Their Diffraction of X-rays
,
1913
.
[4]
W. Bragg.
The Specular Reflection of X-rays.
,
1912,
Nature.
[5]
Toshinari Tanaka,et al.
Simulations to the project of a PXR based X-ray source composed of an electron linac and a double-crystal system
,
2005
.
[6]
P. Zhukova,et al.
Relative contribution of real and virtual photon diffraction to the parametric X-ray yield
,
2005
.