Transportable, Low-Dose Active Fast-Neutron Imaging

Mihalczo, J.T.; Wright, Michael C.; McConchie, Seth M; Archer, D. E.; Palles, Blake A.

doi:10.2172/1400208

Cited by 2 publications

(6 citation statements)

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“…The growth of neutron radiography has led to many innovative concepts and designs for both the neutron generator and the neutron detection system. Neutron imaging systems, particularly using fast (14.1 MeV) neutrons, offer a wide range of detection methods to generate images, including camera-and-mirror setups [1][2] [3], thin-screen converter panels [4], and photomultiplier (PMT) arrays [5] [6]. All of these systems have advantages and disadvantages given the application space they are applied to.…”

Section: Introductionmentioning

confidence: 99%

“…Current state-ofthe-art neutron imaging systems found in laboratory settings also have larger active areas. A single detector package used in the Advanced Portable Neutron Imaging System (APNIS) at Oak Ridge National Laboratory used segmented scintillator blocks that measured 104 mm by 104 mm, though the spatial resolution was limited to 1 centimeter [5]. These blocks could be tiled together using detector electronics used in medical imaging to build a larger radiography panel [5].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a Prototype Multi-DetectorFast-Neutron Radiography Panel

Young,

Browning,

Thurber

et al. 2024

Preprint

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A multi-detector fast neutron radiography panel was built using the pre-vious work on scalable neutron radiography using the IDEAS ROSSPADreadout module. A new aluminum housing was built to accommodate a large number of detectors tiled together. Additional changes tostartup and processing code were made to operate the detector as onecohesive unit. Spatial resolution of the full panel using Cs-137 gammas was reported to be 0.42 line pairs per centimeter at 90% MTFand 2.09 line pairs per centimeter at 10% MTF. Three neutron radio-graphs generated using a Cf-252 fission neutron source were used todetermine the spatial resolution of the panel for neutrons. The experiments had 90% MTF values of 0.24, 0.3, and 0.27 line pairs percentimeter and 10% MTF values of 1.30, 1.46, and 1.40 line pairs percentimeter. An example neutron radiograph was also used to provethat the radiography panel can perform true neutron radiography.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of a Prototype Multi-DetectorFast-Neutron Radiography Panel

Young,

Browning,

Thurber

et al. 2024

Preprint

View full text Add to dashboard Cite

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“…McConchie et al used segmented plastic scintillator arrays instead of a scintillator screen paired with a mirror and camera [19]. These segmented scintillator arrays contain an active detection volume of 540.0 cm 3 (10.4 cm × 10.4 cm × 5.0 cm) divided into 100 pixels with a 1.0 cm pitch and a thickness of 5.0 cm [19]. A 3-mm-thick light spreader sits between the scintillator and four Hamamatsu R9779 photomultiplier tubes (PMTs).…”

Section: Introductionmentioning

confidence: 99%

“…Anger logic is applied to the quad PMT output of each scintillation event to localize the event to one scintillator segment. This creates an image with a spatial resolution limited by the scintillator pitch [19]. The thick scintillators result in faster acquisition times by increasing the uncertainty in the localization algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…This research effort has developed a fast-neutron radiography system that can achieve spatial resolutions close to that of camera and mirror systems [17][18] [15] while still achieving the portability of larger pixelated block detector systems [19]. In addition to this, the system has been designed to be tileable so that the user has the ability to scale in detection area as large as desired.…”

Section: Introductionmentioning

confidence: 99%

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Scalable Detector Design for a High-Resolution Fast-Neutron Radiography Panel

Young

Browning

Thurber

et al. 2023

Preprint

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Development of a scalable flat-panel neutron radiography device is needed to meet the nondestructive testing needs of a growing industrial market. Flood field images from a Cs-137 gamma source and a Cf-252 fission neutron source were generated using a detector composed of a 3-mm-thick sheet of EJ-200, and 3-mm-thick sheet of acrylic light spreader, an 8 × 8 array of SensL MICROFJ-60035-TSV SiPMs, and an IDEAS ROSSPAD readout module. The readout module can be tiled together with similar systems to create a panel of any size, and is only limited by the number of available Ethernet ports in a switching system. A collimated gamma line image demonstrated a 90% spatial resolution of approximately 0.47 line pairs per centimeter and a 10% spatial resolution of approximately 2.32 line pairs per centimeter. A neutron edge image demonstrated a 90% spatial resolution of approximately 0.70 line pairs per centimeter and a 10% spatial resolution of approximately 3.35 line pairs per centimeter. Both of these images show the ability to generate radiographs with sub-SiPM spatial resolution. Using these readout modules, a large-scale radiographic panel can be developed by tiling ROSSPAD modules together.

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Transportable, Low-Dose Active Fast-Neutron Imaging

Cited by 2 publications

References 1 publication

Analysis of a Prototype Multi-DetectorFast-Neutron Radiography Panel

Analysis of a Prototype Multi-DetectorFast-Neutron Radiography Panel

Scalable Detector Design for a High-Resolution Fast-Neutron Radiography Panel

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