The Gunier-Monochromator 611 has a mount for focusing monochromator crystals of the Johansson-Guinier type. The crystals are mounted in a U-shaped metal frame and can thus be easily inserted and exchanged.
The functional housing enables all positioning degrees of freedom that are necessary for the fine adjustment of the crystal in the beam path of the X-ray tube.
Various apertures are included for the precise limitation of the X-ray beam cross-section.
The monochromator is primarily used on the line side of fine focus X-ray tubes (0.4mm x 8mm). The Kα2 -line of the primary radiation is supressed completely.
Other optional distances for A and B can be quoted upon request. Please, specify Anode, A and B.
A wide variety of different crystals for various wave lengths and diverse focal lengths is available or can be produced to customer specifications.
First, the crystal plates with the dimensions 20mm x 40mm x 0.5mm are smoothed at a predetermined angle τ to the lattice planes, and then machined and bent to a precisely calculated concave radius. The smoothing angle ensures that the primary side focus distance A, as measured from the centre of the tube to the centre of the crystal, is smaller than the secondary side focus distance B.
The series 615/616 units only differ in the B distances. Series 616 crystals are predominantly used when greater distances are required.
|Nr.||Anode||Kα1 [Å]||Cryst.||hkl||2θ [°]||A [mm]||B [mm]||α [°]||β [°]|