Self-calibrating position-sensitive silicon detectors

Position-sensitive silicon detectors with discrete position output signal levels have been developed for heavy ion reaction studies at the Lawrence Berkeley Laboratory. The detectors, both 300- and 5000-μm thick, for use in ΔE-E telescopes, employ a series of high and low conductivity strips on the detector p+ contact to produce a position signal with 15 discrete levels. Since the position of the signals from the strips is known, the detectors are self-calibrating against position nonlinearities. Some aspects of the fabrication of both the 300- and 5000-μm detectors are discussed along with their operating characteristics. Illustrative experimental results of 139La-induced reactions on 40Ca targets are presented