Development of Spin Echo Scattering Angle Measurement instrument

V. R. Shah, R. Pynn, A. Washington, P. Stonaha

Low Energy Neutron Source, Indiana University Cyclotron Facility, Bloomington, IN-47408

Spin Echo Scattering Angle Measurement (SESAME) is a method suited for the study of spatial correlations on the length scales of few nm to a few 100 nm in bulk and layered structures. This method codes the neutron scattering vector in to the neutron polarization using suitably shaped magnetic field regions that are birefringent for the neutrons. We have begun the construction of a beam line as a test bed for SESAME at the Low Energy Neutron Source (LENS) at the Indiana University. To create the medium for neutron birefringence and to control spin-echo length probed by the neutrons, we have designed triangular shaped magnetic solenoids and tested their functionality. The details of the instrument design, tests and the complementarity of SESAME with the conventional SANS will be presented in the talk.

References Pynn, R., Fitzsimmons, M. R., Fritzsche, H., Gierlings, M., Major, J. and Jason, A., Rev. Sci Instrum. 76, 053902 (2005)

Back to Seminar Home Page

Last modified 27-May-2008 by website owner: NCNR (attn: )