Drift velocity and gain in argon- and xenon-based mixtures

✍ Scribed by A. Andronic; S. Biagi; P. Braun-Munzinger; C. Garabatos; G. Tsiledakis

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 243 KB
• Volume: 523
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2003.11.426

✦ Synopsis

We present measurements of drift velocities and gains in gas mixtures based on Ar and Xe, with CO 2 ; CH 4 ; and N 2 as quenchers, and compare them with calculations. In particular, we show the dependence of Ar-and Xe-CO 2 drift velocities and gains on the amount of nitrogen contamination in the gas, which in real experiments may build up through leaks. A quantification of the Penning mechanism which contributes to the Townsend coefficients of a given gas mixture is proposed.