A direct time measurements technique for the two-dimensional precision coordinate detectors based on thin-walled drift tubes

摘要

This article presents the results of a study of the longitudinal spatialresolution of 2 m long straw tubes by means of the direct timing method (DTM).The feasibility of achieving a coordinate resolution (r.m.s.) better than 2 cmover full length of the straw is demonstrated. The spatial resolutioninsignificantly changes when measured by detecting gammas from a Fe-55 gammaray source or minimum ionizing particles from a Ru-106 source. The use of thesame type of FEE for data taking both for measuring the drift time ofionization electrons and propagation of a signal along the anode wire allowsone to construct a two-dimensional detector for precision coordinatemeasurements.