Longitudinal tension and mechanical stability of a pressurized straw tube

TL;DR

This paper introduces a new experimental method to evaluate the mechanical stability of pressurized straw tubes used in particle detectors, including measurements of Poisson's ratio and pre-tension estimation.

Contribution

It presents a novel experimental technique for assessing the mechanical properties of pressurized straw tubes, specifically measuring Poisson's ratio and stability conditions.

Findings

Poisson's ratio of the straw wall measured for NA62 spectrometer

Minimum pre-tension estimated for stable operation

Provides a new method for mechanical property evaluation

Abstract

For the development of charged particle detectors based on straw tubes operating in vacuum, a special measurement technique is required for the evaluation of their mechanical properties. A summary of the known equations that govern straw behavior under internal pressure is provided, and a new experimental method of a strained pressurized straw tube study is presented in this paper. The Poisson's ratio of the straw wall, which defines the stability conditions of a built-in tube, is measured for the NA62 spectrometer straw, and its minimum pre-tension is estimated.