Measurements of W-value, Mobility and Gas Gain in Electronegative Gaseous CS2 and CS2 Gas Mixtures

TL;DR

This study measures the W-value, mobility, and gas gain in electronegative CS2 and its mixtures at 40 Torr, revealing how gas composition affects these parameters crucial for gaseous detector performance.

Contribution

It provides new experimental data on W-values, mobility, and gas gain in CS2 and its mixtures, enhancing understanding of their properties for detector applications.

Findings

W-values range from 13.1 to 21.1 eV across samples.

Gas mobility is slightly higher in mixtures than pure CS2.

Gas gain is significantly higher in mixtures compared to pure CS2.

Abstract

W-value, mobility and gas gain measurements have been carried out in electronegative gaseous CS2 and CS2 gas mixtures at a pressure of 40 Torr making use of a single electron proportional counter method. The experimental results have revealed that W-values obtained for CS2 (40 Torr), CS2-CF4 (30 Torr - 10 Torr), CS2-Ar (35 Torr - 5 Torr), CS2-Ne (35 Torr - 5 Torr) and CS2-He (35 Torr - 5 Torr) gas mixtures are 21.1+/-2.7(stat)+/-3(syst) eV, 16.4+/-1.8(stat)+/-2(syst) eV, 13.1+/-1.5(stat)+/-2(syst) eV, 16.3+/-3.0(stat)+/-3(syst) eV and 17.3+/-3.0(stat)+/-3(syst) eV. The mobility for all CS2 gas mixtures was found to be slightly greater and the gas gain was found to be significantly greater relative to pure CS2.