The development and evaluation of solid-state detector arrays for high energy x-ray imaging

Abstract. It is proved the necessity for carrying out computing experiments according to the mean value and the square of registered X-ray photons absorbed energy of in a scintillation detector. The offered imitation model of the transfer and registration of high-energy X-ray radiation in a sensing volume of CsI and CdWO 4 scintillation detectors is based on a Monte Carlo method. The model considers leakage of secondary photons and electrons. It is offered approaches to justification of adequacy of the developed model of a high-energy X-ray radiation registration. IntroductionThe present period is characterized by rapid systems development of digital radiography (DR), computed tomography (CT) and their applications [1,2]. Non-destructive tests and customs monitoring of large-size objects by digital radiography and a computer tomography methods are impossible without sources of high-energy X-ray radiation. Betatrons and linacs of electrons are used as sources of X-ray photons with high maximal energy [3−6]. The main consumer characteristics of DR and CT systems are sensitivity, spatial resolution and efficiency. In the analyzed systems, rulers or matrixes of radiometric detectors, scintillation screens (panels) interfaced to a matrix of photodetectors are applied as registrars of X-ray emission [7]. If elementary detectors of the linear and matrix registrars of radiation are isolate, and the radiating surface of photons sources has the small dimensions, then geometrical resolution of DR and CT systems is determined by detector sizes in the direction of perpendicular to a stream of quanta. Isolation is understood as absence or insignificance of optical and radiation interconnection of the next detectors. Optical signal interconnection from the next photo-detectors can be very significant for panel registrars. For this case, geometrical resolution of analyzed systems can be essentially less than the size of a contact surface of an elementary photodetector. Effectiveness of filing of any kinds of registrars of X-ray radiation is determined by corresponding sensing volumes thickness in the direction of radiation propagation. Increase in thickness of scintillation screens conflicts with need of increase in geometrical resolution. Increasing the thickness of sensing volumes of elementary detectors is technologically difficult task for linear and matrix registrars of X-ray radiation. Thus, technical and technological correctness of using small effective sensing volumes of radiation and optical converters follows from the analysis of geometrical parameters of modern registrars of high-energy X-ray radiation. It is emphasized in the work [8] that high-energy X-ray photons leave a small part of energy when interacting with a scintillator that has small thickness or small cross sectional dimensions. Another part of photons energy is absorbed in the

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Studies of a Solid Detector Array for High Energy X-Ray Imaging System Based on MA-PMT

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IEEE Nuclear Science Symposium Conference Record, 2005

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The development and evaluation of solid-state detector arrays for high energy x-ray imaging

Cited by 4 publications

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Numerical simulation of simple position-sensitive γ-ray detector based on plastic scintillating fiber array (OFT-06-102R1)

Numerical simulation of simple position-sensitive γ-ray detector based on plastic scintillating fiber array (OFT-06-102R1)

High-Energy X-ray Radiation Registration Model

Studies of a Solid Detector Array for High Energy X-Ray Imaging System Based on MA-PMT

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