Particle detection with PNCCDs
2010
A PNCCD is successfully operating as one of the focal plane CCDs aboard the satellite XMM-Newton. An advanced version of this kind of CCDs will be the sensing devices for the eROSITA
X-ray astronomymission. These fully depleted CCDs are developed and manufactured at the MaxPlanck-Institute Semiconductor Lab together with the company PNSensor. Their performance features make them useful in a variety of measurement situations in addition to the astronomical ones. Applications range from photon detection (e.g. optical wave front sensors, cameras for X-ray free electron lasers) to charged particle detection of e.g. electrons, protons, and
alpha particles. First tests have been performed for using a PNCCD in a transmission electron microscope (TEM).
Alpha particlesof an 241 Am
radioactive sourceare used for generating large signal electron clouds for diagnostic purposes. Finally, protons have been used in a radiation hardness test. These three applications will be described and discussed. The prospect of
resolving spaceand energy of each particle in combination with ∼100% efficiency makes the PNCCD especially suitable for low flux applications e.g. examining sensitive samples in a TEM.
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