  Novel multiplexing triple-axis neutron scattering spectrometers yield
significant improvements of the common triple-axis instruments. While the
planar scattering geometry keeps ensuring compatibility with complex sample
environments, a simultaneous detection of scattered neutrons at various angles
and energies leads to tremendous improvements in the data acquisition rate.
Here we report on the software package MJOLNIR that we have developed to handle
the resulting enhancement in data complexity. Using data from the new CAMEA
spectrometer of the Swiss Spallation Neutron Source at the Paul Scherrer
Institut, we show how the software reduces, visualises and treats observables
measured on multiplexing spectrometers. The software package has been
generalised to a uniformed framework, allowing for collaborations across
multiplexing instruments at different facilities, further facilitating new
developments in data treatment, such as fitting routines and modelling of
multi-dimensional data.
