A Novel 2D Position Sensitive Silicon Detector with Micron Resolution for Heavy Ion Tracking

摘要

A new 2D position sensitive silicon detector for tracking of energetic heavy ions is under development in a program to study the radiation effect within a single human cell. The detector is based on a concept of interleaved pixel electrodes arranged in a projective 2D strip readout (stripixel). A fine position resolution in the sub-micron range can be achieved by determining the centroid of the charge collected on pixel electrodes with a granularity in the range of 10μm. Beam test results with 1GeV/n Fe ions have demonstrated an rms position resolution of about 0.5 micron with a 30μm pixel pitch.