Relativistic electrons from sparks in the laboratory

Østgaard, N., B. E. Carlson, R. S. Nisi, T. Gjesteland, Ø. Grøndahl, A. Skeltved, N. G. Lehtinen, A. Mezentsev, M. Marisaldi, and P. Kochkin (2016), Relativistic electrons from sparks in the laboratory, J. Geophys. Res. Atmos., 121, doi.org/10.1002/2015JD024394 (pdf)