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TECHNI Report Summary

Project ID: HPRI-CT-1999-50005
Country: Italy

Fresnel lenses for neutron focussing

New diffractive optics, called Zone Plates, was developed. This optics exploits the Fresnel lens concept and was designed to focus and manipulate thermal and cold neutron beams. These devices are new in the field of neutron optics, and their fabrication took benefice from the advances in the modern nano-lithographic techniques.

The neutron Zone Plates would have ideal applications in the optimisation of that spectrometer which needs a low-divergence neutron beam with a small spatial size. All the neutron scattering facilities are potential end users. The current production procedures are so advanced that systems of lenses with a complex design can be fabricated.

The simplest among compound systems are the assemblies of several lenses with different characteristics (ordinarily used in visible-light optics). A further device, which exploits a more complex design, would be the matrix of high performance small lenses, which can easily reach linear dimensions up to several centimetres. A device like a matrix can be produced in different sizes with characteristics (magnification and working neutron wavelength), which can be optimised for applications in high-resolution neutron imaging and radiography.

Related information

Reported by

Universita di Perugia & INFM (Instituto Nazionale di Fisica Nucleare, Sezione di Perugia)
Via A. Pascoli
06123 Perugia
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