scholarly journals A Fast Neutron Radiography System Using a High Yield Portable DT Neutron Source

2020 ◽  
Vol 6 (12) ◽  
pp. 128
Author(s):  
David L. Williams ◽  
Craig M. Brown ◽  
David Tong ◽  
Alexander Sulyman ◽  
Charles K. Gary
Keyword(s):  
Modulation Transfer Function ◽  
Neutron Generator ◽  
Neutron Radiography ◽  
Digital Camera ◽  
Spot Size ◽  
High Yield ◽  
Modulation Transfer ◽  
Radiography System ◽  
Fast Neutron Radiography ◽  
Spread Function

Resolution measurements were made using 14.1 MeV neutrons from a high-yield, portable DT neutron generator and a neutron camera based on a scintillation screen viewed by a digital camera. Resolution measurements were made using a custom-built, plastic, USAF-1951 resolution chart, of dimensions 125 × 98 × 25.4 mm3, and by calculating the modulation transfer function from the edge-spread function from edges of plastic and steel objects. A portable neutron generator with a yield of 3 × 109 n/s (DT) and a spot size of 1.5 mm was used to irradiate the object with neutrons for 10 min. The neutron camera, based on a 6LiF/ZnS:Cu-doped polypropylene scintillation screen and digital camera was placed at a distance of 140 cm, and produced an image with a spatial resolution of 0.35 cycles per millimeter.

Preliminary Experimentation of Fast Neutron Radiography with D-T Neutron Generator at BARC

2018 ◽  
Vol 38 (1) ◽  
Author(s):  
S. Bishnoi ◽  
P. S. Sarkar ◽  
R. G. Thomas ◽  
T. Patel ◽  
M. Pal ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Neutron Generator ◽  
Neutron Radiography ◽  
Fast Neutron Radiography

Digital Camera Color Resolution Test Based on Knife-Edge Method

2013 ◽  
Vol 469 ◽  
pp. 246-250 ◽  
Author(s):  
Yue Hong Song ◽  
Jun Qing Xu
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Color Space ◽  
Digital Camera ◽  
Image Data ◽  
Knife Edge ◽  
Modulation Transfer ◽  
Lab Color Space ◽  
Edge Method

A resolution test-chart for digital camera has been developed based on the knife-edge method. RAW images have been acquired with NikonD7000 DSLR and Canon G12. Set the device color-space to Adobe RGB, and convert the image data to LAB color-space using Adobe RGB profile. The Fourier transfer of the LAB tonal value were computed under MATLAB environment. Then by analyzing the L/C/H (Derived from LAB space ) and the Modulation Transfer Function (MTF), we can get the resolution characteristics of the Nikon D7000 and Canon G12 camera.

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