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.