Real-time neutron radiography at the IEA-R1m nuclear research reactor

• Autor(a) principal: Menezes,M. O. de
• Data de Publicação: 2003
• Outros Autores: Pugliesi,R., Pereira,M. A. S., Andrade,M.L.G.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Physics
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000200022

A LIXI(Light Intensifier X-ray Image) device has been employed in a real-time neutron radiography system. The LIXI is coupled to a video camera and the real-time images can be observed in a TV monitor, and processed in a computer. In order to get the real-time system operational, the neutron radiography facility installed at the IEA-R1m nuclear research reactor of the IPEN-CNEN/SP has been optimized. The most important improvements were the neutron/gamma ratio, the effective energy of the neutron beam, decrease of the scattered radiation at the irradiation position, and the additional shielding of the video camera. Several one-frame as well as computer processed images are presented. The overall Modulation Transfer Function for the real-time system was obtained from the resolution parameter p = 0:44 ± 0:04mm; the system sensitivity, evaluated for a Perspex step wedge, was determined and the average value is 0:70 ± 0:09mm.