Advanced radiation imaging of low-intensity gamma-ray sources

Woodring, Mitchell L.; Souza, David; Tipnis, Sameer; Waer, P.; Squillante, M.R.; Entine, G.; Ziock, Klaus P.

doi:10.1016/s0168-9002(98)01022-5

Cited by 43 publications

(12 citation statements)

References 5 publications

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“…The viability of these systems has been demonstrated, however they all have fundamental performance limitations as a result of the detector technology utilized in the instruments. The detectors of these and other commercial instruments [4] are scintillator based and as a result provide only poor or no spectroscopic information on the gamma-ray emission. This is because of the inherent inefficiencies in the conversion of the incident gamma ray into visible light in the scintillator and the subsequent electrical signal generation in the photomuliplier or photodiode stage [5].…”

Section: Research Objectivesmentioning

confidence: 99%

Three-Dimensional Position-Sensitive Germanium Detectors

Amman¹,

Luke²

2001

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Section: Research Objectivesmentioning

confidence: 99%

Three-Dimensional Position-Sensitive Germanium Detectors

Amman¹,

Luke²

2001

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“…In imaging of radiation sources using non-directional sensors, directionality is achieved through use of heavy shielding collimators. The use of collimators, including variations such as pinhole and parallel hole collimators, is a common technique in many prior applications [1,2,3,4] for imaging radiation sources. However, the bulk and weight of this general collimator design often requires a robust assembly and relatively powerful actuators to manoeuvre the collimated detector, which is expensive in terms of the material and actuators.…”

Section: Introductionmentioning

confidence: 99%

Inverse Collimator-Based Radiation Imaging Detector System

SurB.

YueS.

JonkmansG.

2012

AECL Nuclear Review

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A radiation imaging system has been developed using the concept of inverse collimation, where a narrow shielding pencil is used instead of a classical collimator. This imaging detector is smaller, lighter and less expensive than a traditionally collimated detector, and can produce a spherical raster image of radiation sources in its surroundings. A prototype was developed at Atomic Energy of Canada Limited – Chalk River Laboratories, and the concept has been successfully proven in experiments using a point source as well as real sources in a high ambient field area. Such a radiation imaging system is effective in locating radiation sources in areas where accessibility is low and risk of radiological contamination is high, with applications in decontamination and decommissioning activities, nuclear material processing labs, etc.

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“…[4,5,9] are installed at the input face of the detector to provide an image of the radioactive sources. Position-sensitive photomultipliers [1,4,6}9] and charge-coupled devices (CCD) [3,5] are used as readout systems for the scintillators.…”

Section: Introductionmentioning

confidence: 99%

“…In most systems, 2D scintillator screens [1}5] and arrays [6}9], as well as semiconductor arrays [10}12] are applied. Pin-hole [3,6}8] and multiple-hole [1] collimators and coded apertures [4,5,9] are installed at the input face of the detector to provide an image of the radioactive sources. Position-sensitive photomultipliers [1,4,6}9] and charge-coupled devices (CCD) [3,5] are used as readout systems for the scintillators.…”

mentioning

confidence: 99%

“…Pin-hole [3,6}8] and multiple-hole [1] collimators and coded apertures [4,5,9] are installed at the input face of the detector to provide an image of the radioactive sources. Position-sensitive photomultipliers [1,4,6}9] and charge-coupled devices (CCD) [3,5] are used as readout systems for the scintillators. Plate-like detectors are also used for the scanning and locating (but not imaging) of the radioactive sources [13].…”

mentioning

confidence: 99%

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Microchannel Plate Detector

Elam¹,

Lee²,

Wang³

et al. 2008

Encyclopedia of Genetics, Genomics, Proteomics and Informatics

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The`edge-ona illuminated microchannel plate (MCP) position-sensitive detector (PSD) is used for gamma-ray imaging for the "rst time. The superior position resolution of the MCP is combined with high detection e$ciency due to the`edge-ona illumination mode. The results of imaging a 15 Ci Cs source (662 keV quantum energy) are presented.2001 Elsevier Science B.V. All rights reserved. [4,5,9] are installed at the input face of the detector to provide an image of the radioactive sources. Position-sensitive photomultipliers [1,4,6}9] and charge-coupled devices (CCD) [3,5] are used as readout systems for the scintillators. Plate-like detectors are also used for the scanning and locating (but not imaging) of the radioactive sources [13].The applications of hard X-ray position-sensetive detectors (PSDs) in medicine are described in detail in review [14]. Although the parameters of E-mail address: pms@peterlink.ru (P.M. Shikhaliev).hard radiation PSDs are continuously optimized, there is a fundamental limitation: increasing the position resolution leads to decrease of detection e$ciency. At the same time, it is well known that microchannel plate (MCP) detectors provide a superior position resolution but the detection e$ciency of conventional MCP detectors is low for the hard radiation [15,16].Recently, we have suggested a novel hard X-ray detector based on MCPs that provides a higher hard X-ray detection e$ciency in comparison with conventional MCP detectors [17,18]. The`edgeona illumination of the MCP has been used to combine the superior position resolution of MCP with high detection e$ciency. It has also been predicted that the positon-sensitive performance of thè edge-ona MCP detector may be used for the hard X-ray imaging systems. Note that this`edge-ona illumination concept has also been applied for silicon strip detector [19] and CCDs [20].

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Advanced radiation imaging of low-intensity gamma-ray sources

Cited by 43 publications

References 5 publications

Three-Dimensional Position-Sensitive Germanium Detectors

Three-Dimensional Position-Sensitive Germanium Detectors

Inverse Collimator-Based Radiation Imaging Detector System

Microchannel Plate Detector

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