HIGH-EFFICIENCY FREE-ELECTRON LASER RESULTS K. Boyer, C.A. Brau, B.E. Newnam, W.E. Stein, R.W. Warren, J.G. Winston et L.M. Young J. Phys. Colloques, 44 C1 (1983) C1-109-C1-111 DOI: 10.1051/jphyscol:1983106