Amor - Selene

Selene is the attempt to implement a new scheme for high-intensity specular reflectometry. Instead of a highly collimated beam one uses a convergent beam covering a large angular range. The resolution of qz is performed on by an position sensitive detector. Off-specular scattering in this set-up leads to some background, but for screening of wide parameter ranges (e.g. temperature, electric and magnetic fields) the intensity gain of at least one order of magnitude is essential. The following high precision measurements (even with off-specular components) is then performed with the conventional set-up.

The heart of this new set-up is an elliptically focusing guide element of 2 m length. Though this guide is optimised for the use on the TOF reflectometer Amor at SINQ, it can be used as stand-alone device to check the possible application for other neutron scattering techniques on various instruments also.