Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8179591 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2013 | 4 Pages |
Abstract
Neutron energy analysing by refraction with prisms allows to measure different wavelengths at the same time thus avoiding losses due to monochromatization. We built and tested a refractive energy analysing device made from small prisms, where losses only occur due to the attenuation in the material. We measured the refraction and the transmission of MgF2 and Si prisms at the V14 reflectometer in Berlin at 4.9Â Ã
to check their applicability. The experimentally determined linear attenuation coefficients are 0.055Â cmâ1 for the MgF2 and 0.03Â cmâ1 for the Si prisms. An energy analyser consisting of silicon prism layers was measured at the EROS reflectometer at the LLB in a white neutron beam. The useful wavelength band was 2.4-7.6Â Ã
. At 6.7Â Ã
a wavelength resolution of 5% and a transmission of 53% were achieved. The surface roughness of the prisms could be determined to be (0.011±0.006)deg.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
J. Schulz, F. Ott, Ch. Hülsen, Th. Krist,