Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures
read the original abstract
We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric field strengths of 50-300 V/cm. In pure xenon we find excellent agreement with world data at all $E/P$, for both drift velocity and diffusion coefficients. However, a larger value of the longitudinal diffusion coefficient than theoretical predictions is found at low $E/P$ in pure xenon, below the range of reduced fields usually probed by TPC experiments. A similar effect is observed in xenon-helium gas mixtures at somewhat larger $E/P$. Drift velocities in xenon-helium mixtures are found to be theoretically well predicted. Although longitudinal diffusion in xenon-helium mixtures is found to be larger than anticipated, extrapolation based on the measured longitudinal diffusion coefficients suggest that the use of helium additives to reduce transverse diffusion in xenon gas remains a promising prospect.
This paper has not been read by Pith yet.
Forward citations
Cited by 1 Pith paper
-
ITACA revisited: Ion Tracking Apparatus with CMOS ASICs
ITACA is a conceptual HPXeEL TPC with MARS-positioned Topmetal CMOS ion detector for real-time 3D ion tracking, projecting sensitivity to 0νββ half-lives above 10^28 years.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.