Test and simulation of plastic scintillator strips readout by silicon photomultipliers

2014 ◽  
Vol 9 (04) ◽  
pp. T04004-T04004 ◽  
Author(s):  
G Balbi ◽  
M Boldini ◽  
V Cafaro ◽  
F Fabbri ◽  
V Giordano ◽  
...  
Keyword(s):  
Plastic Scintillator ◽  
Silicon Photomultipliers

scholarly journals A new compact neutron/gamma ray scintillation detector

2016 ◽  
Vol 44 ◽  
pp. 1660228 ◽  
Author(s):  
A. Buffler ◽  
A. C. Comrie ◽  
F. D. Smit ◽  
H. J. Wörtche
Keyword(s):  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Plastic Scintillator ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Neutron Energy Range ◽  
Neutron Spectrometer ◽  
Silicon Photomultipliers ◽  
Digital Implementation

Progress towards the realization of a new compact neutron spectrometer is described. The detector is based on EJ299-33 plastic scintillator coupled to silicon photomultipliers, and a digital implementation of pulse shape discrimination is used to separate events associated with neutrons from those associated with gamma rays. The spectrometer will be suitable over the neutron energy range 1–100 MeV, illustrated in this work with measurements made using an AmBe radioisotopic source and quasi-monoenergetic neutron beams produced using a cyclotron.

Proposal of a Novel Setup for Linac Monitoring Using a Specifically Designed Plastic Scintillator and a Spectrophotometer

2016 ◽  
Vol 4 (1) ◽  
pp. 175-182
Author(s):  
F. Moreno-Barbosa ◽  
◽  
R. Palomino-Merino ◽  
E. Moreno-Barbosa ◽  
E. Miguel-Chumacero ◽  
...  
Keyword(s):  
Plastic Scintillator

Modeling and Simulation of PGSPAD Based Silicon Photomultipliers

2021 ◽  
pp. 1-1
Author(s):  
Mst Shamim Ara Shawkat ◽  
Md Sakib Hasan ◽  
Nicole McFarlane
Keyword(s):  
Modeling And Simulation ◽  
Silicon Photomultipliers

scholarly journals Single-Photon Detection Module Based on Large-Area Silicon Photomultipliers for Time-Domain Diffuse Optics

Instruments ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 18
Author(s):  
Fabio Acerbi ◽  
Anurag Behera ◽  
Alberto Dalla Mora ◽  
Laura Di Sieno ◽  
Alberto Gola
Keyword(s):  
Time Resolution ◽  
Time Domain ◽  
Single Photon ◽  
Building Blocks ◽  
The Body ◽  
Single Photon Detection ◽  
Silicon Photomultipliers ◽  
Photon Detection ◽  
Instrument Response Function ◽  
Diffuse Optics

Silicon photomultipliers (SiPM) are pixelated single-photon detectors combining high sensitivity, good time resolution and high dynamic range. They are emerging in many fields, such as time-domain diffuse optics (TD-DO). This is a promising technique in neurology, oncology, and quality assessment of food, wood, and pharmaceuticals. SiPMs can have very large areas and can significantly increase the sensitivity of TD-DO in tissue investigation. However, such improvement is currently limited by the high detector noise and the worsening of SiPM single-photon time resolution due to the large parasitic capacitances. To overcome such limitation, in this paper, we present two single-photon detection modules, based on 6 × 6 mm2 and 10 × 10 mm2 SiPMs, housed in vacuum-sealed TO packages, cooled to −15 °C and −36 °C, respectively. They integrate front-end amplifiers and temperature controllers, being very useful instruments for TD-DO and other biological and physical applications. The signal extraction from the SiPM was improved. The noise is reduced by more than two orders of magnitude compared to the room temperature level. The full suitability of the proposed detectors for TD-DO measurements is outside the scope of this work, but preliminary tests were performed analyzing the shape and the stability of the Instrument Response Function. The proposed modules are thus fundamental building blocks to push the TD-DO towards deeper investigations inside the body.

scholarly journals Fully digital PET is unaffected by any deterioration in TOF resolution and TOF image quality in the wide range of routine PET count rates

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Julien Salvadori ◽  
Freddy Odille ◽  
Gilles Karcher ◽  
Pierre-Yves Marie ◽  
Laetitia Imbert
Keyword(s):  
Image Quality ◽  
Dead Time ◽  
Silicon Photomultipliers ◽  
Timing Resolution ◽  
Upper Limits ◽  
Wide Range ◽  
Pile Up ◽  
Digital Pet ◽  
Trigger Circuit

Abstract Purpose Digital PET involving silicon photomultipliers (SiPM) provides an enhanced time-of-flight (TOF) resolution as compared with photomultiplier (PMT)-based PET, but also a better prevention of the count-related rises in dead time and pile-up effects mainly due to smaller trigger domains (i.e., the detection surfaces associated with each trigger circuit). This study aimed to determine whether this latter property could help prevent against deteriorations in TOF resolution and TOF image quality in the wide range of PET count rates documented in clinical routine. Methods Variations, according to count rates, in timing resolution and in TOF-related enhancement of the quality of phantom images were compared between the first fully digital PET (Vereos) and a PMT-based PET (Ingenuity). Single-count rate values were additionally extracted from the list-mode data of routine analog- and digital-PET exams at each 500-ms interval, in order to determine the ranges of routine PET count rates. Results Routine PET count rates were lower for the Vereos than for the Ingenuity. For Ingenuity, the upper limits were estimated at approximately 21.7 and 33.2 Mcps after injection of respectively 3 and 5 MBq.kg-1 of current 18F-labeled tracers. At 5.8 Mcps, corresponding to the lower limit of the routine count rates documented with the Ingenuity, timing resolutions provided by the scatter phantom were 326 and 621 ps for Vereos and Ingenuity, respectively. At higher count rates, timing resolution was remarkably stable for Vereos but exhibited a progressive deterioration for Ingenuity, respectively reaching 732 and 847 ps at the upper limits of 21.7 and 33.2 Mcps. The averaged TOF-related gain in signal/noise ratio was stable at approximately 2 for Vereos but decreased from 1.36 at 5.8 Mcps to 1.14 and 1.00 at respectively 21.7 and 33.2 Mcps for Ingenuity. Conclusion Contrary to the Ingenuity PMT-based PET, the Vereos fully digital PET is unaffected by any deterioration in TOF resolution and consequently, in the quality of TOF images, in the wide range of routine PET count rates. This advantage is even more striking with higher count-rates for which the preferential use of digital PET should be further recommended (i.e., dynamic PET recording, higher injected activities).

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