NEW NEUTRON MAGNETIC LOW INDEX LEAKY WAVE-GUIDE COUPLER

In the present paper a new kind of neutron De Broglie wave leaky coupl er-guide structure is proposed. This new magnetic coupler allows only one neutron polarization to be coupled into a magnetic neutron thin fi lm waveguide. It is shown theoretically that this new thin film couple r decrease considerably the losses due to the roughness of the interfa ces of the multilayer structure. Moreover a transmitted resonance peak is observed in a wavelength region accessible only for guided neutron waves. Thus a magnetic neutron coupler is proposed and a transmitted polarized neutron guided wave is observed experimentally. (C) 1997 Ame rican Institute of Physics.