报告人简介(CV):
Ariel Ruzin 教授,博士,博导,现为以色列特拉维夫大学物理电子学教授。主要研究方向是复合半导体探测器(SiGe, CdTe, CdZnTe, CdMnTe),硅和金刚石探测器,钠米接触,器件模拟,和原子力显微镜等。Rubin 教授是 Springer Nature 的 Journal of Materials Science: Materials in Electronics 的编辑, IEEE 资深会员,SPIE 和 OePG 会员,CERN RD50 成员。
报告摘要(Abstract):
Ever since the discovery of ionizing radiation in 1895, its detection became a major research challenge. There are three main reasons for the importance of that field: (i) The usefulness of this penetrating radiation; (ii) the hazards of the radiation to living creatures; (iii) the information it carries about the fundamental nature surrounding us.
There are several types of “detection”: (a) counting the particles; (2) finding the energy of each particle; (3) finding the time of the particle-matter interaction; (4) finding the total energy carried by the radiation per unit time, per unit area. There are various types of ionizing particles and various energy ranges. These particles have varying reaction/interaction cross- sections with matter; therefore their detection requires various detectors.
Ionizing radiation detectors are key components in numerous applications in the fields of medicine, security, non-destructive testing in industry, science, etc. Development of new applications and development of existing systems constantly challenge the performance requirements from the detectors. For example: higher absorption efficiency would decrease the patient dose during medical imaging, higher spatial resolution would provide more detailed information, etc. Many of the novel detector materials are wide bandgap compound semiconductors. Alongside many advantages, these materials introduce a number of technological and even fundamental issues.
This presentation reviews the various semiconductor detector types (materials and structures), applications, and challenges.