The wide-angle neutron spin echo spectrometer project WASP

Article type: Research Article

Authors: Fouquet, Peter | Ehlers, Georg | Farago, Bela | Pappas, Catherine | Mezei, Ferenc

Affiliations: Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France | BENSC, Hahn-Meitner-Institut, Glienickerstr. 100, 14109 Berlin, Germany

Note: [] Corresponding author. Tel.: + 33 476 20 7204. Fax: + 33 476 20 7688. Email: [email protected]

Note: [] Present Address: SNS, Scarboro Road, Oak Ridge, TN 37830, USA.

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

DOI: 10.1080/10238160601048791

Journal: Journal of Neutron Research, vol. 15, no. 1, pp. 39-47, 2007