Organized by the Institute of Experimental Physics, University of Bialystok and the Institute of Atomic Energy, Swierk under the auspices of the European Crystallographic Association; Committee of Crystallography, the Polish Academy of Sciences; and the Polish Neutron Scattering Society The School is financially supported in part by the International Union of Crystallography; the European Crystallographic Association; the European Office of Aerospace Research & Development; the Ministry of Science and Information Society Technologies; the Warsaw University of Technology; and the University of Bialystok.
		Modern neutron imaging: Current research in neutron computed tomography, phase contrast imaging and stroboscopic neutron radiography Burkhard Schillinger, Germany   Topics Other than X-rays, neutrons can penetrate most metals while at the same time showing high contrast for hydrogen. Even small amounts of liquids, plastics, sealants or lubricants can be detected within metal machine parts. A piece of cellar tape on a 10 cm slab of Aluminium is well visible. While X-rays remain fist choice for non-destructive testing because of their broad availability and ease of use, neutron radiography can access a major part of the problems that cannot be solved with X-rays. Neutron radiography with Gadolinium converters and X-ray film has been around from the beginning of research reactors, but never gained importance as a technical tool due to difficult handling, non-linear sensitivity and lack of the possibilities of digital image processing. With the development of electronic imaging detectors for neutron radiography, a lot of new applications has become feasible. Standard radiography is enhanced by the possibility of normalising, filtering and region-of-interest in dynamic range. With fixed detectors (in contrast to film), neutron computed tomography can be performed, and with camera detectors with trigger-able image intensifiers, repetitive motions like rotating engines can be recorded with a stroboscopic technique with time resolutions below 200 microseconds. Even phase contrast imaging of very low absorbing, but phase-shifting materials has become possible also with neutrons. Technische Universität München (D) and Paul-Scherrer-Institut (CH) have for the past decade lead a fruitful cooperation in the development of neutron imaging techniques. The talk will explain about the differences to X-ray imaging, the difficulties in neutron beam formation, detector systems and give examples for all mentioned imaging techniques.