Since the construction of NUR reactor neutron radiography facility in 1991, only transfer exposure method was used as a non destructive technique. The reason is the excess of gamma rays in the neutron beam. To improve radiation performances of the NR system, a stainless steal hollow conical cylinder is introduced at the bottom of the facility beam port, this filter reduce gamma infiltration through the edges of the NR structure without disturbing neutron beam arriving from the in pool divergent collimator. First results confirm our prediction; a gamma rays diminution and a relatively stable neutron flux at the point object are confirmed, consequently the n/γ ratio reaches a value of Radiograms obtained by using the direct exposure method reveal the feasibility of the technique in the new NR configuration facility, but a weak resolution and contrast of the image is observed. In this paper, we describe a procedure to improve the image quality obtained by direct exposure technique. The process consists of using digitized images obtained by several exposure techniques (NR, gamma radiography or X radiography) for a comparison study and then better image definition can be attained.
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17 March 2008
NEUTRON AND X‐RAY SCATTERING 2007: The International Conference
23–31 July 2007
Serpong and Bandung (Indonesia)
Research Article|
March 17 2008
Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques
T. Zergoug;
T. Zergoug
Centre de Recherche Nucléaire de Draria, (CRND) BP 43 Draria 16000, Algiers, Algeria
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A. Nedjar;
A. Nedjar
Centre de Recherche Nucléaire de Draria, (CRND) BP 43 Draria 16000, Algiers, Algeria
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M. Y. Mokeddem;
M. Y. Mokeddem
Centre de Recherche Nucléaire de Draria, (CRND) BP 43 Draria 16000, Algiers, Algeria
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L. Mammou
L. Mammou
Centre de Recherche Nucléaire de Draria, (CRND) BP 43 Draria 16000, Algiers, Algeria
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T. Zergoug
A. Nedjar
M. Y. Mokeddem
L. Mammou
Centre de Recherche Nucléaire de Draria, (CRND) BP 43 Draria 16000, Algiers, Algeria
AIP Conf. Proc. 989, 187–189 (2008)
Citation
T. Zergoug, A. Nedjar, M. Y. Mokeddem, L. Mammou; Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques. AIP Conf. Proc. 17 March 2008; 989 (1): 187–189. https://doi.org/10.1063/1.2906061
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