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

TL;DR

This paper demonstrates a direct timing method to achieve high spatial resolution in 2-meter-long straw tube detectors, enabling precise two-dimensional coordinate measurements with minimal resolution variation across the detector length.

Contribution

It introduces a direct timing technique for straw tubes that achieves better than 2 cm spatial resolution over the full length, and shows how to construct a 2D detector using the same FEE for drift time and signal propagation.

Findings

Achieved spatial resolution better than 2 cm over 2 meters

Resolution remains consistent when using gamma or ionizing particle sources

Constructed a 2D detector with a single type of FEE for both measurements

Abstract

This article presents the results of a study of the longitudinal spatial resolution 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 cm over full length of the straw is demonstrated. The spatial resolution insignificantly changes when measured by detecting gammas from a Fe-55 gamma ray source or minimum ionizing particles from a Ru-106 source. The use of the same type of FEE for data taking both for measuring the drift time of ionization electrons and propagation of a signal along the anode wire allows one to construct a two-dimensional detector for precision coordinate measurements.