Crystals & Applications
The Bragg's Law :
The Bragg's law drives all the physics of diffraction in single crystals.
Particularly, it allows to calculate the 2d spacing of the crystal according to your need of a wavelength(es) range.
Or to choose the angle of your detector for your experiment.
The Planck-Einstein Equation :
The Planck-Einstein equation converts the energy E (keV) into its wavelength (A°).
Many parameters are stringent in the specification of the X-Ray optic :
• the perfect shaping of the 2d spacing of the crystal such as to preserve the Bragg's angle according
to the geometry of the optic
• its reflectivity : light level and homogeneity
• its wavelength or energy resolution that is the ability to distinguish the X-Ray peaks
Germanium, Silicium and Quartz
AlpyX has selected premium Germanium, Silicon and Quartz single crystals for the coverage of a wide range of wavelengths.
They are usually selected for :
• the utmost quality of their crystal lattice, their high resistance to the high X-ray flux when used in synchrotrons or plasma physics,
• their mechanical resistance, compared to some other conventional crystals like PET or LiF
Our optics work from a choice of 2d spacing cut from Germanium, Silicon or Quartz single crystal.
Please refer to AlpyX chart to select the right 2d spacing of the crystal.
Applications
The X-Ray crystal optic is one of the key component for X-Ray analysis systems :
• X-Ray spectrometry: WDXRF or EDXRF
• X-Ray diffractometry: powder or crystals
The X-Ray crystal optic basically achieves 2 functions :
• to shape the X-Ray beam before its interaction with the sample, or before the X-Ray detector
• to perfectly monochromatize the beam such as to provide the highest level of information to the detector
Many parameters are stringent in the specification of the X-Ray optic :
