Flow visualization in a low-density plasma channel R.L. Kimmel, J.R. Hayes, J. Estevadeordal, J.W. Crafton, S.D. Fonov and S. Gogineni Eur. Phys. J. Special Topics, 182 (2010) 125-144 Published online: 06 July 2010 DOI: 10.1140/epjst/e2010-01229-8