15 research outputs found
TERAHERTZ BAND FREE ELECTRON LASERS WITH HYBRID BRAGG REFLECTORS*
Abstract Periodical Bragg structures can be considered as an effective way of controlling the electromagnetic energy fluxes and provision of spatial coherence of radiation in the electron devices with oversized interaction space. Advance of long-pulse FEL with 2D distributed feedback into the terahertz waveband can be achieved by using a two-mirror scheme in which an advanced Bragg reflector (a periodical structure exploiting the coupling between the two counter-propagating waves and a cutoff mode) is used as an upstream mirror. In the planar model considered in the present paper this reflector provides effective mode selection over the "narrow" transverse coordinate directed between the plates. Synchronization of radiation from a sheet electron beam over the "wide" coordinate can be obtained by exploiting structures providing 2D distributed feedback used as a downstream mirror
Modellierung des Wolgaabschnitts von Km 850-1184 Schlussbericht
SIGLEAvailable from TIB Hannover: F02B1172 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung, Berlin (Germany)DEGerman