Silicon die tests. Number of events per hour versus calibrated absorbed energy in the NTD thermometer for two positions of the diaphragm along the silicon die (green and blue) and for the Tandem test (brown). The absorbed energies have been corrected taking into account the differences of the absorbed energy in the silicon die between the tests (1.1 MeV absorbed in the silicon die by α particle in Grenoble tests and 1.6 MeV absorbed in the silicon die from the Tandem accelerator test.)