Neutron optics using holographic gratings

En Aulas en edificio taller imagen: Aula 13 el día 10/10/2013 a las 13:00:00
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  Información   Neutron optics using holographic gratings  MARTIN FALLY  

Nombre:   Neutron optics using holographic gratings
Título:  Neutron optics using holographic gratings
Resumen:  All neutron-optical phenomena are governed by the neutron-optical potential or, equivalently, the neutron refractive-index. Thus, an important task in the design of neutron-optical elements is patterning the neutron refractive-index of materials in an efficient way. For this purpose we employ materials that are sensitive to light combined with holographic techniques to produce holographic diffraction gratings for neutron-optics. We will discuss recent neutron-optic experiments with holographic gratings in which we have demonstrated that two- and three-port beam-splitters as well as free-standing film mirrors for cold and very-cold neutrons are feasible by exploiting the Pendellösung interference effect known in dynamical diffraction theory. Another intriguing possibility is offered by holographic gratings containing superparamagnetic nanoparticles to produce business card-size neutron polarizers working in comparably low external magnetic induction, devices which are being developed at present. Finally we will give an outlook on novel neutron-scattering instrumentation and techniques which are expected from those advancements.
Duración:  01:27:55.82
Keywords:   holography, gratings, neutron optics
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Usuario: andres.marquez[perdoname] Tipo:  DIRECTO
Visitas:  768 Tamaño:  757.56MB