Extracting source parameters from beam monitors on a chopper spectrometer
1 Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2 Instrument and Source Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
Published online: 23 January 2015
The intensity distributions of beam monitors in direct-geometry time-of-flight neutron spectrometers provide important information about the instrument resolution. For short-pulse spallation neutron sources in particular, the asymmetry of the source pulse may be extracted and compared to Monte Carlo source simulations. An explicit formula using a Gaussian-convolved Ikeda-Carpenter distribution is given and compared to data from the ARCS instrument at the Spallation Neutron Source.
© Owned by the authors, published by EDP Sciences, 2015
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