Md. Feit et al., ELECTRON CAVITATION AND RELATIVISTIC SELF-FOCUSING IN UNDERDENSE PLASMA, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(6), 1998, pp. 7122-7125
An improved cavitation model shows that stable beam channeling and ele
ctron cavitation occur for relativistic laser intensities even at powe
rs hundreds of times larger than the critical power for self-focusing.