Flat-field image measuring device and method for X-ray energy
A flat-field image and X-ray technology, which is applied in the field of nuclear physics and radiation detection, can solve problems such as the limitation of radiation field strength and complex device structure, and achieve the effect of reducing the system scale and enriching the types
Active Publication Date: 2015-09-23
NORTHWEST INST OF NUCLEAR TECH
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[0006] In order to solve the technical problems of existing ray beam energy measurement methods and devices with complex structures and limited use by radiation field strength, the present invention provides a flat-field image measurement method of X-ray energy, which can be applied to both steady-state and pulsed radiation Field ray energy measurement method
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[0058] The micro-sensitivity element array detector 2 adopts a CCD camera system that integrates detection components and signal recording components. The size of each pixel is 24μm×24μm, the size of the array is 512×512, and the quantized output of the camera is 16bits. Experiments were carried out on the Cs-137 source and the Co-60 source. When the ray is vertically incident on the photosensitive surface of the CCD, and the distance between the photosensitive surface of the CCD and the source is about 1.5m, the CCD camera measures several different energy rays under different doses. Noise figure such as figure 2 , it can be seen that with the increase of the ray intensity, the average value of the CCD camera output changes, but its noise index remains unchanged, and the noise index also changes with the change of the ray energy, so the relationship between the calibrated noise index and the ray energy , the energy information of the incident ray can be obtained. Since the ...
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The invention relates to a flat-field image measuring device and a flat-field image measuring method for X-ray energy. The flat-field image measuring device comprises a ray detecting assembly and a signal recording assembly, wherein the ray detecting assembly is a CCD, CMOS, film, imaging plate or scintillator, and is used for converting X-rays into corresponding flat-field images; when the ray detecting assembly is a CCD or CMOS, the signal recording assembly comprises an electric signal read-out system which is used for collecting, amplifying and quantifying electric signals of the flat-field images; when the ray detecting assembly is a film or an imaging plate, the signal recording assembly is used for realizing signal development process of the flat-field images; when the ray detecting assembly is a scintillator, the signal recording assembly comprises an optical imaging system for the flat-field images; and the optical imaging system comprises a reflector, a lens and a camera. The flat-field image measuring device and the flat-field image measuring method for X-ray energy provided by the invention is small in system scale, can obtain intensity and energy of rays simultaneously in a single measurement, and is suitable for energy measurement of a steady-state ray source.
Description
technical field [0001] The invention belongs to the field of nuclear physics and radiation detection, and relates to a measuring device and method for X-ray energy, in particular to a flat-field image measuring device and method for X-ray energy. Background technique [0002] Ray energy is one of the main parameters of X-ray sources and radiation fields, and is an indispensable and important physical quantity in the application of X-ray devices and the physical research of radiation sources. Therefore, the measurement of ray energy is an important content of radiation physics research, and the measurement of single photon or monoenergetic ray beam energy is the basis of radiation field energy spectrum measurement. [0003] In the field of nuclear physics and radiation detection, there are three common methods for measuring ray energy: one is to deposit all the energy of the ray in the sensitive volume of the detector, and measure the electrical or optical signal correspondin...
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IPC IPC(8): G01T1/16
Inventor 宋顾周段宝军黑东炜马继明韩长材
Owner NORTHWEST INST OF NUCLEAR TECH