Coupling of Laser Energy into Plasma Channels.

D.A. Dimitrov, R.E. Giacone, D.L. Bruhwiler, R. Busby, J.R. Cary, C.G.R. Geddes, E. Esarey, and W.P. Leemans, “Coupling of Laser Energy into Plasma Channels,” Phys. Plasmas 14, 043105 (2007).