Microbeam Micro Area X Fluorescence Probe Method Technology Research

Along with the social development and progress of science and technology, peoplein order to meet the needs of the current, slowly on the material of the macroscopicfield of research into the microcosmic field.On the microscopic inspection and testingmaterial composition for environment protection, semiconductor material, toxicsubstances, and thin film materials of geology and mineral resources, and many otherfields has a major role in the analysis of samples.Facing this trend, in view of the Chengdu University of Technology institute ofnuclear technology and automation engineering self-developed microbeam IED-2000type of the X fluorescence microprobe analyzer, optimization and the researchof calibration method. On the basis of theoretical research, this paper introduces indetail the micro beam X-ray fluorescence micro area analyzer analysis principle andstructure characteristics.This thesis mainly research results are as follows:1.Based on EdiX-III micro tube, primary rays angular distribution of the microX-ray tube launches the research, it is concluded that: in the same Angle, angulardistribution measurement in different distances of the primary rays have similar laws,basic it is gaussian distribution, and the basic keep in the X-ray is4PI cubic Anglegay a device, in the experiments, turn the X ray tube has no effect on measuringresults. The miniature X ray tube excitation is obtained and stimulate the basic lineargeometric distance relationship, as long as the measure of X-ray emission Angle, thedifferent excitation distance is known, the range of excitation is how much. Perfectthe conditions of use of miniature X ray tube.2.In this paper, on the basis of the original instrument for X-ray lens and microX-ray tube connections is optimized. Within the optimization results show that thefitting can accurately adjust the distance of the micro X-ray tube and the X-ray lens,micro X-ray tube and the convergence X-ray lens can be closed.his miniature X raytube can be emitted x-rays can effectively be X-ray lens collects, and reduce radiationleaks. Controlled by fitting the screw, the launch of micro X-ray tube hole can bethree-dimensional adjustment. So that the x-rays emitted by the micro X-ray tube can be accurately is entrance section of the X-ray lens, satisfies the requirement of X-raylens in the optical path. The front end of the micro X-ray tube installed a perforatedlead sheet, not only can play the role of collimation, can also be shielded from themicro X-ray tube primary X-ray leak part when from the X-ray lens, reduce theimpact on measurement results.3.Microbeam micro area of main performance indicators of X ray fluorescenceanalyzer examination can refer to 《the geological and mineral of the People’sRepublic of China. DZ/T0011-91.1:50000geochemical reconnaissance specification》requirements.The test results show that the instrument energy linear, precision,stability, instability and spectrum drift, microscope imaging system performanceindicators in line with requirements. Applicable to the analysis of geological samplesand block, chip, optical material analysis, etc., and has the characteristics of simple,fast, low cost. Its further promotion to the metallography, electronic science, medicine,biology and environmental monitoring, etc.4.National standard samples, is adopted to establish the calibration equation, thecalibration experience coefficient method of quantitative analysis model. Preliminaryestablished with Fe, As, Ti, Co library of14kinds of elements of the calibration curve,and the calibration coefficient. Get the fit of the calibration curve is higher, the energyhas good linear.Above research results, to perfect our self-developed microbeam IED-2000typeof the X fluorescence probe analyzer are of great help. Will quicken the steps oflocalization of such instruments, break the monopoly situation of the domestic marketby foreign instrument, improve the level of China mineral resources exploration of thedevice and technology level. Because the microbeam micro area X fluorescencemicroprobe analyzer, superior performance, makes its have more broad applicationprospects.