Ultra-Sensitive X-Ray Fluorescence Detection System

A novel and ultra-sensitive x-ray fluorescence detector system has been proposed. The detector systconcept of selecting x-ray fluorescence from an elastically scattered background by the diffractionmultilayer. The multilayer will be graded as to satisfy the diffraction condition everywhere on themultilayer array detector can be made with excellent energy selectivity (sufficient background rejecand fast time response. The first phase of the project is to test the concept, evaluate the detectora prototype detector with a single multilayer element and scintillator/PMT. A conceptual design of tarray detector will be generated based on the tests and analysis, which is essential for developingmarketable product in Phase II. The comparison of the proposed array detector with the currently opedetectors, such as the 13-element Ge detector and ionization chamber, shows that the multilayer arraefficient when using a sample of a few mM in metal concentration. The advantages of the array detectevident under the conditions of increased flux and/or decreased sample concentration. The detector wdetection efficiency for spectroscopy data collection at existing synchrotron sources, and it will popportunities for conducting the experiments either on time-resolved transient states or on very dilgeneration synchrotron sources. The cost for constructing the detector is well justified in view ofthe Costs for building new beamlines.