Possibilities for polarized pulsed neutron instrumentation based on the time-of-flight spin-resonance energy filter

We present a new approach for dynamic energy filtering at spallation neutron sources, based on the original concept of the Drabkin spin-resonance flipper. The setup takes advantage of the neutron magnetic moment, and consists of a wavelength-selective magnetic resonator and a supermirror polarizer/analyzer system. We are proposing refinements (time dependence and revised magnetic field profiles) to the basic concepts of the setup, making it suitable for time-of-flight experiments at spallation neutron sources. We outline here possibilities for using this spin resonator as the core of new neutron instruments.