Measurements of W-value, mobility and gas gain in electronegative gaseous CS2 and CS2 gas mixtures

W-value, mobility and gas gain measurements have been carried out in electronegative gaseous CS2 and CS2 with a broad range of gas mixture additives 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 (30–10 Torr), CS2–CF4 (20–20 Torr), CS2–CF4 (10–30 Torr), CS2–Ne (35–5 Torr) and CS2–He (35–5 Torr) gas mixtures are 24.9±0.8, 25.2±0.6, 29.2±1.0, 33.0±1.0, 23.1±0.8 and 23.7±0.8 eV, respectively. The average mobility was measured in all CS2 gas mixtures and was found to be slightly greater than in pure CS2. The gas gain was found to be significantly greater in CS2 gas mixtures relatively to pure CS2.