Despite being discovered in 1960 (Vela satellites) Gamma Ray Bursts (GRBs) are still full of mystery and the production mechanism of these very intense explosions in the universe is still unknown. To validate – or exclude – existing models about their creation, a precise measurement of the polarisation of the GRB is essential.
POLAR is a highly sensitive detector using the Compton Scattering Effect to measure the polarisation of incoming photons. With its large FoV (field of view) and a detection energy up to 500 keV POLAR will measure the polarisation of GRB emissions using low Z material Plastic Scintillators, multimode Photomultipliers and multi-channel ASIC Front-end Electronics. POLAR is scheduled for two to three years operation in space during which a large number of GRBs are expected to be measured.