Edge-spread function in neutron radiography

Harms, A. A.; Garside, B. K.; Chan, P. S. W.

doi:10.1063/1.1661825

Cited by 23 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To evaluate the spatial resolution of the FNR system, we used the knife-edge method, treating the edge of a 5 cm Pb sample as the knife-edge [18,19]. We investigated the edge spread function (ESF), line spread function (LSF), and modulation transfer function (MTF) of the sample image [20].…”

Section: Resultsmentioning

confidence: 99%

Fast neutron radiography detector with polyethylene converter and MCP: development and performance evaluation

Bai

Liu

et al. 2023

J. Inst.

View full text Add to dashboard Cite

We present a new position-sensitive fast neutron detector for 14 MeV fast neutron radiography, comprising a high-density polyethylene converter, a micro-channel plate (MCP), a P43 phosphor screen, a reflection mirror, and a CCD camera. Experimental tests are conducted using a DT neutron generator at CIAE, with different samples and a knife-edge measurement used to determine overall image resolution. Results show that the detector is feasible for fast neutron radiography, producing a fast neutron image with a neutron flux of ∼ 3.22 × 104 n · s-1 · cm-2 and 120 s exposure time. Our study demonstrates the potential of this detector for use in fast neutron radiography applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Fast neutron radiography detector with polyethylene converter and MCP: development and performance evaluation

Bai

Liu

et al. 2023

J. Inst.

View full text Add to dashboard Cite

show abstract

“…7 shows the result obtained for 7 minutes of irradiation. The Edge Spread Function, ESF, was fitted to the points [16,17]:…”

Section: Spatial Resolutionmentioning

confidence: 99%

“…Usually the resolution is given by ( 4) and is quoted in terms of the total unsharpness "Ut" and corresponds to the width at half maximum of the Line Spread function, LSF, associated to (3) [17,18]:…”

Section: Spatial Resolutionmentioning

confidence: 99%

A Simple Setup for Neutron Tomography at the Portuguese Nuclear Research Reactor

2012

View full text Add to dashboard Cite

A simple setup for neutron radiography and tomography was recently installed at the Portuguese Research Reactor. The objective of this work was to determine the operational characteristics of the installed setup, namely the irradiation time to obtain the best dynamic range for individual images and the spatial resolution. The performance of the equipment was demonstrated by imaging a fragment of a 17 th century decorative tile.

show abstract

“…14 shows the film LSF. In this case, the experimental data were fitted using a Lorentzian spread functions [18], [19]. The film resolution (as defined by the full width at half maximum, FWHM, of the LSF) is obtained from the fit and found to be in the range of 33 m. In the case of the LSF obtained using the IP, a Gaussian function was used to fit the LSF.…”

Section: Facility Construction and Experimental Characterizationmentioning

confidence: 99%

Design and Performance of a Thermal Neutron Imaging Facility at the North Carolina State University PULSTAR Reactor

Mishra

Hawari

Gillette

2006

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

A thermal neutron imaging facility has been set up at the North Carolina State University PULSTAR reactor. The PULSTAR is an open pool light water moderated 1 MWth research reactor with six beam tubes. The present facility is set up on beam tube # 5 of the reactor. The facility is intended to have radiographic and tomographic capabilities. The design of the neutron collimator was performed using MCNP5. The collimator includes a 4-in bismuth filter followed by a 6-in single-crystal sapphire filter. Thermal neutron scattering cross-section libraries for sapphire and bismuth were generated and used in the MCNP simulation of the system. Based on the current design, the L/D of the facility ranges between 100 and 150. The neutron flux at the image plane can be varied from 1 8 10 6 to 7 10 6 n/cm 2 s with a Cd-ratio of 450. The resolution of the system for different imaging media was also estimated and found to be 33 m for conventional radiography film and 110 m for digital image plates. Initial measurements, using ASTM standards, show that the imaging facility achieves a beam quality classification of I A .

show abstract

Edge-spread function in neutron radiography

Cited by 23 publications

References 5 publications

Fast neutron radiography detector with polyethylene converter and MCP: development and performance evaluation

Fast neutron radiography detector with polyethylene converter and MCP: development and performance evaluation

A Simple Setup for Neutron Tomography at the Portuguese Nuclear Research Reactor

Design and Performance of a Thermal Neutron Imaging Facility at the North Carolina State University PULSTAR Reactor

Contact Info

Product

Resources

About