Stabilizing the intensity of a wave amplified by a beam of particles R. Bachelard, A. Antoniazzi, C. Chandre, D. Fanelli, X. Leoncini and M. Vittot Eur. Phys. J. D, 42 1 (2007) 125-132 Published online: 22 December 2006 DOI: 10.1140/epjd/e2006-00276-x