Highly efficient narrow-band free-electron laser with a Bragg resonator and a reverse guide field (initial experiments) Bogachenkov, V. A. ; Ginsburg, N. S. ; Kaminskii, A. A. ; Kaminskii, A. K. ; Peskov, N. Yu. ; Sarantsev, V. P. ; Sedykh, S. N. ; Sergeev, A. P. ; Sergeev, A. S. Abstract Publication: Technical Physics Letters Pub Date: November 1995 Bibcode: 1995TePhL..21..925B