The 2D small angle detector project at the FOCUS time-of-flight spectrometer at SINQ

Article type: Research Article

Authors: Jurányi, F.^; | Holitzner, L.^; | Schlumpf, N. | Greuter, U. | Gahl, T.^; | Janssen, S. | Mesot, J. | Hempelmann, R.

Affiliations: Physical Chemistry, Saarland University, DE-66123 Saarbrücken, Germany | Laboratory for Neutron Scattering, PSI & ETHZ, CH-5232 Villigen PSI, Switzerland | Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland | Institute Laue-Langevin, 6, Rue Jules Horowitz, F-38042 Grenoble, France

Note: [] Corresponding author. Tel.: + 41-56-3103176. Fax: + 41-56-3102939. Email: [email protected]

Abstract: A small-angle detector will complete the performance of the cold time-of-flight spectrometer FOCUS at the Swiss Spallation Source SINQ of the Paul Scherrer Institute, Villigen, Switzerland. It is constructed from position-sensitive 3He tubes located 2.5 m away from the sample, and covers an area of about 95×70 cm2 with a spatial resolution of approximately 1.5 cm. The 2D detector is located within a vacuum chamber, next to the argon chamber of the existing large angle detectors, and covers an angular range from 2 to 22°. Commissioning of the 2D small angle detector will start in spring 2006.

Keywords: Neutron scattering, Instrumentation, Time-of-flight, Small-angle detector, Position-sensitive detector

DOI: 10.1080/10238160601048924

Journal: Journal of Neutron Research, vol. 14, no. 4, pp. 333-338, 2006