Among the accessories that came with it is a "Absorber Cu 99,9%" P/N "A17-B53." This appears to be associated with the Lynxeye, but I can't find any information for it. The XRD came with both Cu and Co sources. Thanks.
Hi Frederick,
when operating your XRD system with either the Cu or the Co source you will operate the tube at voltages far above the k-edge energy of the target material. For example you operate your system at 30 kVp in order to achieve large k-alpha fluorescence output.
However you have to pay a high price: i.e. the bremsstrahlung that is additiononally produced by the x-ray tube. Photons up to the 30keV photon energy value will pop up and thus Compton scatter will come up at your sample preferably for high energy photons and will contaminate your diffractogram by a scatter background and its noise. The Cu Absorber will kill a lot of the high energy photons due to its k-absorption-edge.
Furthermore fluorescence background due to excitation of K- and L- lines of elements in the sample having appropriate edges above Cu K-edge (~9keV) will also be strongly reduced.
Hi Frederick,
when operating your XRD system with either the Cu or the Co source you will operate the tube at voltages far above the k-edge energy of the target material. For example you operate your system at 30 kVp in order to achieve large k-alpha fluorescence output.
However you have to pay a high price: i.e. the bremsstrahlung that is additiononally produced by the x-ray tube. Photons up to the 30keV photon energy value will pop up and thus Compton scatter will come up at your sample preferably for high energy photons and will contaminate your diffractogram by a scatter background and its noise. The Cu Absorber will kill a lot of the high energy photons due to its k-absorption-edge.
Furthermore fluorescence background due to excitation of K- and L- lines of elements in the sample having appropriate edges above Cu K-edge (~9keV) will also be strongly reduced.
The absorber is use suppress X-ray intensity to prevent the detector from saturation while doing alignment (refer to Goniometer Reference Angle Determination). Cu-absorber (0.1 mm) for Cu-tube and so on.
Before u perform the task I suggest to verify by scan the SRM and compare with it certificate.
Here is the example from SRM1967a (CuKa1 : 0.154060 nm) that usually came with Bruker instrument (other seems to use Silicon).
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