Электронный каталог

Статья

Tsverava, N.
Development and Property Study of the 12 *mm Wall Thick Straw Tubes with a Diameter of 5 mm for the COMET Straw Tracker System / N.Tsverava, D.Chokheli, Z.Tsamalaidze, [a.o.]. – Text : electronic // Nuclear Instruments & Methods in Physics Research A. – 2026. – Vol. 1081. – P. 170853. – URL: https://doi.org/10.1016/j.nima.2025.170853. – Bibliogr.: 26.

The paper presents a study of the mechanical properties of 5 mm diameter and 12 *mm wall thick straws, such as their sagging, displacement, and diameter dependence on overpressure and external axial load. This study is crucial for keeping the COMET Phase-II Straw Tracker System (STS) spatial resolution at 150 *mm to achieve a momentum resolution better than 200 keV/c for 105 MeV/c electrons with the 8 GeV proton beam intensity increased from 3.2 to 56 kW during Phase-II. The STS must operate in a vacuum with the inner pressure of 1 bar applied to the straws. It is found that the diameter of the straw tube increases by 16.1 *( 2.0 *mm per bar of delivered pressure and shrinks by 1.3 *( 0.3 *mm per 100 g of external axial load. For the straw with a 1.34 m length, at least 200 g axial load is needed to keep the straightness better than 200 μm.



Спец.(статьи,препринты) = С 344.1 - Методы и аппаратура для регистрации элементарных частиц и фотонов$
ОИЯИ = ОИЯИ (JINR)2026