Free electron lasers with sheet electron beams and two-dimensional planar Bragg resonators

摘要: The use of two-dimensional Bragg resonators planar geometry, realizing distributed feedback, is considered as a method producing spatially coherent radiation from large sheet electron beam. Selective properties 2-D resonator are studied when the transverse sides open and also they closed. A time-domain analysis excitation an by beam demonstrates that single mode steady-state oscillation regime may be obtained for width up to 1000 wavelengths. At same time, even in closed can realized if does not exceed 50-100 project FEL with driven based on U-2 accelerator (INP RAS, Novosibirsk) discussed.