Current status of software development on chopper spectrometers for MLF, J-PARC

Inamura, Yasuhiro; Nakajima, Kenji   ; Kajimoto, Ryoichi  ; Nakatani, Takeshi ; Otomo, Toshiya*; Suzuki, Jiro*; Arai, Masatoshi; So, J.-Y.*; Park, J.-G.*

We report the current status of software development for chopper spectrometer, 4SEASONS, AMATERAS, at Materials and Life Science Facility (MLF), J-PARC. This development work consists of several parts, i.e. the control system on spectrometer (data acquisition and devices), support for decisions of experimental conditions, sample environment (direction alignment), data reduction and visualization. On commissioning of spectrometers, using actual neutron beam, we have already utilized our software in the processes of obtaining neutron signals as event-by-event data, transforming them to histograms and visualizing the results. Especially, using event data, we have successfully demonstrate to visualize two-dimensional maps of dynamical structure factors measured with different incident energies simultaneously obtained by one measurements by multiple incident energy measurement on 4SEASONS.