A Computer Study of Time Resolutions and Charge Collection Times of Ge Gamma-Ray Detectors with Currently Employed Time Pick-Off Techniques

An attempt to quantitatively calculate the time resolutions from different combinations of Ge gamma-ray detectors, filters, and time pick-off techniques, is described. The study is based on charge collection time calculations previously studied, optimizations of filters, and the choice of parameters in the different time pick-off techniques. Results of the time resolution simulations with a 3 cc planar detector and a 5.6 cc coaxial detector of the Ge (Li) type, are presented and are in good agreement with previously obtained experimental and theoretical results. A brief discussion of the most common trigger modes (and related time jitters and time walks) particularly in reference to the Ge gamma-ray detectors, is also given.