scholarly journals DEVELOPMENT OF POSITION-SENSITIVE FRISCH-GRID CDZNTEDETECTORS FOR GAMMA-RAY IMAGING

2021 ◽  
Author(s):  
RALPH JAMES
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Imaging ◽  
Position Sensitive

scholarly journals Experimental Study of Using a 3-D Position Sensitive CdZnTe Detector for Proton Beam Range Verification

2021 ◽  
Author(s):  
Valerie Nwadeyi ◽  
Paul maggi ◽  
Zhong He ◽  
Jerimy Polf
Keyword(s):  
Proton Beam ◽  
Expectation Maximization ◽  
Gamma Ray ◽  
Prompt Gamma ◽  
Cdznte Detector ◽  
Maximum Likelihood Expectation Maximization ◽  
Gamma Ray Imaging ◽  
Position Sensitive ◽  
Beam Range ◽  
Range Verification

This manuscript discusses the use of a large volume array CZT detector for experimental prompt gamma-ray imaging. Namely, the 718 keV and the 4.44 MeV photopeaks produced from proton-carbon interactions are imaged using maximum likelihood expectation maximization (MLEM). Various proton beam irradiations are used to characterize the feasibility of using both photopeaks for beam range verification.

Some Interesting Work on Capillary Glass Detectors

2014 ◽  
pp. 103-113
Keyword(s):  
Gamma Ray ◽  
X Rays ◽  
Glass Capillary ◽  
Large Area ◽  
Vacuum Technology ◽  
Gas Atmosphere ◽  
Gamma Ray Imaging ◽  
Position Sensitive ◽  
Primary Electrons ◽  
Glass Detectors

In this chapter, the progress of the development of glass capillary plates is described. In some applications, capillary plates have advantages over GEM or other gaseous detectors. For example, they are compatible with vacuum technology allowing them to be used in sealed gaseous detectors. Prototypes of capillary plates combined with photocathodes sensitive to ultraviolet and visible light were the first to be developed and successfully tested. These detectors resemble vacuum imaging microchannel plates, widely used in many applications. However, the glass capillary plates operate in gas atmosphere and in avalanche mode. This offers a possibility to build large area position-sensitive photomultipliers since at atmospheric pressure there are no serious mechanical constrains on the window. Since glass has a high density, the capillary plate can also be used as efficient convertors of X-rays, and be used at the same time as a multiplication structure for the created primary electrons. Such a device is attractive for X-ray and gamma ray imaging and the first successful tests of a prototype of such a detector are described.

scholarly journals Experimental Study of Using a 3-D Position Sensitive CdZnTe Detector for Proton Beam Range Verification

2021 ◽  
Author(s):  
Valerie Nwadeyi ◽  
Paul maggi ◽  
Zhong He ◽  
Jerimy Polf
Keyword(s):  
Proton Beam ◽  
Expectation Maximization ◽  
Gamma Ray ◽  
Prompt Gamma ◽  
Cdznte Detector ◽  
Maximum Likelihood Expectation Maximization ◽  
Gamma Ray Imaging ◽  
Position Sensitive ◽  
Beam Range ◽  
Range Verification

This manuscript discusses the use of a large volume array CZT detector for experimental prompt gamma-ray imaging. Namely, the 718 keV and the 4.44 MeV photopeaks produced from proton-carbon interactions are imaged using maximum likelihood expectation maximization (MLEM). Various proton beam irradiations are used to characterize the feasibility of using both photopeaks for beam range verification.

scholarly journals Experimental Study of Using a 3-D Position Sensitive CdZnTe Detector for Proton Beam Range Verification

2021 ◽  
Author(s):  
Valerie Nwadeyi ◽  
Paul maggi ◽  
Zhong He ◽  
Jerimy Polf
Keyword(s):  
Proton Beam ◽  
Expectation Maximization ◽  
Gamma Ray ◽  
Prompt Gamma ◽  
Cdznte Detector ◽  
Maximum Likelihood Expectation Maximization ◽  
Gamma Ray Imaging ◽  
Position Sensitive ◽  
Beam Range ◽  
Range Verification

This manuscript discusses the use of a large volume array CZT detector for experimental prompt gamma-ray imaging. Namely, the 718 keV and the 4.44 MeV photopeaks produced from proton-carbon interactions are imaged using maximum likelihood expectation maximization (MLEM). Various proton beam irradiations are used to characterize the feasibility of using both photopeaks for beam range verification.

Prototype Parallel Readout System for Position Sensitive PMT Based Gamma Ray Imaging Systems

2007 ◽  
Vol 54 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Frezghi Habte ◽  
Peter D. Olcott ◽  
Craig S. Levin ◽  
Angela M. Foudray
Keyword(s):  
Gamma Ray ◽  
Imaging Systems ◽  
Readout System ◽  
Gamma Ray Imaging ◽  
Position Sensitive

scholarly journals Development of a position-sensitive fast scintillator (LaBr3(Ce)) detector setup for gamma-ray imaging application

2021 ◽  
Vol 253 ◽  
pp. 11005
Author(s):  
Biswajit Das ◽  
R. Palit ◽  
R. Donthi ◽  
A. Kundu ◽  
S. R. Laskar ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Geant4 Simulation ◽  
Position Information ◽  
Coincidence Technique ◽  
Imaging Application ◽  
Gamma Ray Imaging ◽  
Position Sensitive ◽  
Set Up ◽  
Detector Crystal

We have characterized a Cerium doped Lanthanum Bromide (LaBr3(Ce) ) crystal coupled with the position-sensitive photo-multiplier system for the gamma-ray imaging application. One can use this detector set-up for the scanning of high purity germanium detectors for pulse shape analysis in gamma-ray spectroscopy experiments and the image formation of an object by Compton back-scattering . The sensor has been tested for energy, timing and position information of the gamma-rays interacting within the detector crystal. The GEANT4 simulation results are consistent with the experimental results. We have reconstructed the image of irradiation spots in different positions throughout the detector crystal. Position resolution is found to be around 3.5 mm with the 2 mm collimated gamma-rays. The 2-d image of hexagonal Bismuth Germanate (BGO) crystal and a cylindrical LaBr3(Ce) crystal have been reconstructed in coincidence technique. The performance of the detector for imaging application has been investigated by coincidence technique in GEANT4 simulation and compared with the experimental data. We have reconstructed the 2-d images of objects with various geometrical shapes by Compton back-scattered events of the gamma-rays. This position-sensitive detector can be used as an absorber of a Compton camera for the image reconstruction of an extended radioactive source. One can also use this kind of set-up as in radiation imaging and many other applications where the energy and source position of the gamma-ray is the main interest.

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