This page contain measured drift velocities and longitundial diffusion coefficiencts for high-pressure xenon-helium has mixtures as presented in the paper::
Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures
A.D. McDonald, K. Woodruff, B. Al Atoum, D. Gonzalez-Diaz, B.J.P. Jones and the NEXT Collaboration
http://arxiv.org/abs/arXiv:1902.05544
We present three tables in columnar format: index || Eletric Field [V/cm] || Pressure [bar] || Reduced Field [V/cm/bar] || Reduced Field Error || Velocity [mm/mus] || Velocity Error || Longitudinal Diffusion [mm/mus] || Longitudinal Diffusion Error
Last update:
Wednesday June 5, 2019.
Figures show longitidinal coefficients for pure xenon (left) compared to world data and for mixtures (right). Figure taken from http://arxiv.org/abs/arXiv:1902.05544.