Service Communautaire d'Information sur la Recherche et le Développement - CORDIS


TECHNI Résumé de rapport

Project ID: HPRI-CT-1999-50005
Financé au titre de: FP5-HUMAN POTENTIAL
Pays: United Kingdom

Development of a novel focussing device for thermal neutrons - The Neutron Silicon Lens (NSL)

A new device, the Neutron Silicon Lens (NSL), for imaging thermal neutrons has been designed and tested successfully. The NSL consists of multiple layers of different thickness, each layer being a wafer of single crystal silicon coated with a neutron supermirror coating. An optimal stacking arrangement (which has been determined) allows, in principle, the reflection of all neutrons incident upon the lens within an appropriate angular divergence range. By reflecting each neutron once (and only once) the stack of mirrors can focus a line source to a line image of good quality. A combination of two NSL should be able to image a point source. A practical device has been tested with a focal length of around 500mm.

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M.W. JOHNSON, (Director of Instrumentation)
Tél.: +44-1235-445418
Fax: +44-1235-445840