Motoribeamstop_schema.jpgzed beamstop at BM29 is located inside the flight tube just before the big kapton window. It consists from a hollow tungsten cylinder of 3 mm external diameter, wall thikness of 1 mm and an incoporated diode with 1 mm by 1mm active size. Diode reading is performed for each frame recorded and detector counts are normalised to it. Shadow of the beamstop on detector is masked out for further processing.P3200003.JPG