Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1823034 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2013 | 8 Pages |
Abstract
The work is motivated by the construction of the European Spallation Source (ESS) but the results are general and can be used at any neutron source. Due to the long pulse structure, most instruments at ESS will be long, often exceeding 50Â m from moderator to detector. We therefore investigate the performance of bi-spectral extraction for instrument lengths of 30Â m, 56Â m, 81Â m and 156Â m. In all these cases, our results show that we can utilize both moderators (and thus high intensity in a wide wavelength band) in the same instrument at a cost of flux of 5-30% for neutrons with wavelength larger than 1Â Ã
. In general, the divergence distribution is smooth at the sample position for all wavelengths.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Henrik Jacobsen, Klaus Lieutenant, Carolin Zendler, Kim Lefmann,