Engineering Commons^™

Evaluation Of Silicon Detectors With Integrated Jfet For Biomedical Applications, Mitra Safavi-Naeini, D. Franklin, Michael L. Lerch, Marco Petasecca, Giorgio U. Pignatel, Mark I. Reinhard, G. F. Dalla Betta, N. Zorzi, Anatoly B. Rosenfeld

Anatoly Rozenfeld

This paper presents initial results from electrical, spectroscopic and ion beam induced charge (IBIC) characterisation of a novel silicon PIN detector, featuring an on-chip n -channel JFET and matched feedback capacitor integrated on its p-side (frontside). This structure reduces electronic noise by minimising stray capacitance and enables highly efficient optical coupling between the detector back-side and scintillator, providing a fill factor of close to 100%. The detector is specifically designed for use in high resolution gamma cameras, where a pixellated scintillator crystal is directly coupled to an array of silicon photodetectors. The on-chip JFET is matched with the photodiode capacitance …