Improvement of a Gaseous Position Sensitive Detector for use in Thermal Neutron Tomographic Systems
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876469999927820288 |
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| author | Marcelo J. Gonçalves |
| author_facet | Marcelo J. Gonçalves |
| contents | Improvement of a Gaseous Position Sensitive Detector for use in Thermal Neutron Tomographic Systems Marcelo J. Gonçalves Maria Ines Silvani Gevaldo L. de Almeida Rosanne C. A. A. Furieri Ricardo T. Lopes Física, Astronomía y Matemáticas The utilization of a position sensitive detector in tomographic systems is an attractive possibility because itis capable of furnishing the position where the ionizing event occurs. This feature can reduce significantlythe image acquiring time, since a sample translation is no longer required. In this work the performance ofa gaseous position sensitive detector equipping a thermal neutron tomographic system has been improved bya stepwise increase of the filling-gas (3He-enriched helium) pressure from 3 to 6 atm. Important quantitativedetector parameters such as resolution, linearity and homogeneity have been measured for that pressure range,and compared with the tomographic images of test-samples. Several test-samples have been studied, all ofthem constituted by an aluminum cylinder containing inserts of different materials. Besides that, the modulationtransfer function-MTF for the system has been experimentally obtained and compared with the expectedtheoretical curve. An improvement of both detector efficiency and resolution has been observed, as theoreticallyexpected from an increase of the filling-gas pressure. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434512 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3A Vol.34 |
| format | Artículo científico |
| id | redalyc_46434512 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Improvement of a Gaseous Position Sensitive Detector for use in Thermal Neutron Tomographic Systems Marcelo J. Gonçalves Física, Astronomía y Matemáticas Improvement of a Gaseous Position Sensitive Detector for use in Thermal Neutron Tomographic Systems Marcelo J. Gonçalves Maria Ines Silvani Gevaldo L. de Almeida Rosanne C. A. A. Furieri Ricardo T. Lopes Física, Astronomía y Matemáticas The utilization of a position sensitive detector in tomographic systems is an attractive possibility because itis capable of furnishing the position where the ionizing event occurs. This feature can reduce significantlythe image acquiring time, since a sample translation is no longer required. In this work the performance ofa gaseous position sensitive detector equipping a thermal neutron tomographic system has been improved bya stepwise increase of the filling-gas (3He-enriched helium) pressure from 3 to 6 atm. Important quantitativedetector parameters such as resolution, linearity and homogeneity have been measured for that pressure range,and compared with the tomographic images of test-samples. Several test-samples have been studied, all ofthem constituted by an aluminum cylinder containing inserts of different materials. Besides that, the modulationtransfer function-MTF for the system has been experimentally obtained and compared with the expectedtheoretical curve. An improvement of both detector efficiency and resolution has been observed, as theoreticallyexpected from an increase of the filling-gas pressure. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434512 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3A Vol.34 |
| title | Improvement of a Gaseous Position Sensitive Detector for use in Thermal Neutron Tomographic Systems |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434512 |