Success and failure of dead-time models as applied to hybrid pixel detectors in high-flux applications

Abstract

The performance of a single-photon-counting hybrid pixel detector has been investigated at the Australian Synchrotron. Results are compared with the body of accepted analytical models previously validated with other detectors. Detector functionals are valuable for empirical calibration. It is shown that the matching of the detector dead-time with the temporal synchrotron source structure leads to substantial improvements in count rate and linearity of response. Standard implementations are linear up to ∼0.36 MHz pixel -1; the optimized linearity in this configuration has an extended range up to ∼0.71 MHz pixel-1; these are further correctable with a transfer function to ∼1.77 MHz pixel-1. Th..