Speaker
Description
High Resolution Transmission Electron Microscopy (HRTEM) is a milestone in the imaging of structural defects. A LGAD sample irradiates at a fluence of 1e19 1MeV neutrons/cm2 has been investigated with a JEOL 2100 system, equipped with high resolution polar piece. Structural changes subsequent to a 30 min isochronous thermal treatment @150C, 200C, 250C, 200C and 350C respectively have been followed via HRTEM.
Point defects (vacancies and/or interstitials) or very small clusters of point defects have been observed to organize along well defined tracks. From a qualitative perspective, this aspect was found to be common along the whole series. However, starting from 250C, significantly larger clusters of defects started to be randomly observed.
