Development of Magnetic Field Components for the Polarisation Option of the Neutron Spectrometer FOCUSL. Holitzner, U. Filges, J.P. Embs, T. Fennell, T. Panzner
Laboratory for Developments and Methods, Paul Scherrer Institut, Villigen, Switzerland
Laboratory for Neutron Scattering, Paul Scherrer Institut, Villigen, Switzerland
We show a new, favourable space-saving method to host a neutron polarizer in the iron-containing monochromator shielding of a time-of-flight spectrometer for cold neutrons. In this poster you can learn e.g., how to create a robust, homogeneous, rectangular magnetic field (here realized by permanent magnet queues inside an iron tube).
The time-of-flight spectrometer FOCUS at the spallation neutron source SINQ at Paul Scherrer Institut can be extended by a polarisation option. Our current activities concentrate on the components for the primary polarisation: the polariser (to order the neutron spin), the magnetic guide field (to keep the beam polarised) and a spin flipper (which can invert the spin direction). These new components have to be implemented into the existing neutron spectrometer.