Position-sensitive coincidence detection of nuclear reaction products with configurable array of Timepix detectors

In low-energy nuclear reactions of astrophysical and fusion interest the spatial- and time-correlated detection of two and more reaction products can be a useful tool to discern reaction mechanisms such as investigate reaction channels, measure angular distributions of reaction products and determine partial reaction widths. For this purpose we assembled a configurable array of Timepix detectors with trigger and synchronized readout by a custom-made coincidence unit. The instrumentation, developed and tested for detection of fission fragments in spontaneous and neutron induced fission, has been extended to low-energy light-ion induced reactions. Application and demonstration of the technique with two Timepix detectors on p+p elastic scattering and on the reaction 11B(p,α)αα at the Van de Graaff (VdG) accelerator in Prague and the Tandem VdG accelerator of the KINR in Kiev, respectively, are presented.