Energy dependence of the flux and elastic resolution for the ARCS neutron spectrometer

by Jiao
Energy dependence of the flux and elastic resolution for the ARCS neutron spectrometer

Flux and elastic resolution for a wide range of instrument conditions were measured and modeled for the ARCS chopper spectrometer.

This work provides a key reference for users of the ARCS instrument, making it easier for users to plan for their experiments. The online interactive resolution/flux plots make it much easier for ARCS users to take educated tradeoff between resolution and flux, while taking their experiment requirements into account.

Research details:

  • A series of vanadium calibration measurements for a wide range of incident energies were performed for the ARCS direct geometry chopper spectrometer
  • Analytical models were able to reproduce most of the general trends observed in the measurements.
  • MCViNE simulations were used to confirm modeling results when experimental results are not reliable for direct measurement of resolution

This work was published at https://doi.org/10.1016/j.physb.2018.11.027.