The wide-angle neutron spin echo spectrometer project WASP

Abstract

This paper describes design and optimization for the wide angle spin-echo spectrometer (WASP) presently being planned at the ILL. The spectrometer will be a replacement for the high intensity spectrometer IN11 and will enhance its signal by more than one order of magnitude while maintaining the resolution of the present spectrometer. The paper outlines the magnetic field calculations and the considerations about possible limitations. The projected performance has been verified carefully by Monte Carlo raytracing and Biot–Savart magnetic field calculations. The maximum momentum transfer of the new spectrometer is to be extended to 4 Å^− 1.

Keywords:

• Instrumentation
• Neutron Scattering
• Neutron Spin-Echo
• Magnetic Field Calculations

Notes

^¶Present Address: SNS, Scarboro Road, Oak Ridge, TN 37830, USA.

Additional information

Notes on contributors

Georg Ehlers

¶ ¶Present Address: SNS, Scarboro Road, Oak Ridge, TN 37830, USA.