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New X-ray technique targets terrorists and tumors
Date:11/30/2007

ssue identification in humans or identifying explosives, cocaine or heroin in freight. It could also be used in aerospace engineering, to establish whether the alloys in a weld have too much strain.

To develop the technology Prof Cernik and his team have had to overcome two major technological challenges.

The first was to produce pixellated spectroscopy grade energy sensitive detectors. This was carried out in collaboration with Rutherford Appleton Laboratory, Oxford and Daresbury Laboratory, Cheshire.

The second challenge was to build a device known as a 2D collimator, which filters and directs streams of scattered X-rays. The collimator device needed to have a high aspect ratio of 6000:1, meaning that it its width to its length is more than that of the channel tunnel.

This device was built using a laser drilling method in collaboration with The University of Cambridge.

Professor Cernik added: There is a great deal of interest within engineering communities in the non-destructive determination of residual stresses in manufactured components, especially in critical areas such as aircraft wings and engine casings.

The TEDDI system can be used for strain scanning whole fabricated components in the automotive or aerospace industries, although we are currently limited to light alloys.

Using detectors made from silicon, the Manchester team has been restricted to looking at thin samples or light atom structures.

But they are developing new, high purity, high atomic weight, semiconductor detector materials that will remove this difficulty and drastically speed up scanning times.


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Contact: Alex Waddington
alex.waddington@manchester.ac.uk
01-612-758-387
University of Manchester
Source:Eurekalert

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