Radiographic sensitivity improved by optimized high resolution X-ray detector design

Paper in proceeding, 2007

A compact imaging detector, based on scintillation fiber optics, has been used for high resolution industrial radiography since 1996. This type of imaging detectors have proven to give superior performance compared to fine grained industrial x-ray film in terms of detection efficiency and spatial resolution. The objective of this paper is to show that the radiographic sensitivity can be improved even further. First, the detection process has been studied by Monte-Carlo simulations and the result shows that the radiation is detected in a very narrow range from the axis of the primary beam. Secondary, Monte-Carlo simulations shows that a bent fiber optic image conduit can eliminate radiation induced noise in the CCD almost completely and reduce the depth of the detector to less then 100 mm.