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. YoungJ. Phys. Colloques, 44 C1 (1983) C1-109-C1-111DOI: https://doi.org/10.1051/jphyscol:1983106