1998/05/01 by Andrei V. Korol, A. V. Korol, Andrey V. Solov’yov +3 · 4 citations
Engineering · Physics and Astronomy · #Crystallography and Radiation Phenomena #Gyrotron and Vacuum Electronics Research #Terahertz technology and applications #physics.acc-ph
paper · pdf · doi:10.1088/0954-3899/24/5/001
published as J.Phys. G24 (1998) L45-L53 · published in J. Phys. G: Nucl. Part. Phys. 24 (1998) L45-L53, http://www.iop.org
openalex publication_date 1998/05/01 · arxiv created 2001/09/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We suggest a new type of the undulator radiation which is generated by an ultrarelativistic particle channelled along a periodically bent crystallographic plane or axis. The electromagnetic radiation arises mainly due to the bending of the particle's trajectory, which follows the shape of the channel. The parameters of this undulator, which totally define the spectrum and the angular distribution of the radiation (both spontaneous and stimulated), depend on the type of the crystal and the crystallographic plane (axis), the type of projectile and its energy, and on the shape of the bent channel and, thus, can be varied significantly by varying these characteristics. As an example, we consider the acoustically induced radiation (AIR) which is generated by ultrarelativistic particles channelled in a crystal which is bent by a transverse acoustic wave. The AIR mechanism allows us to make undulators with the main parameters varying over wide ranges, which are inaccessible in the undulators based on the motion of particles in the periodic magnetic fields and also in the field of the laser radiation. The intensity of AIR can easily be made larger than the intensity of the radiation in a linear crystal and can be varied over a wide range by varying the frequency and the amplitude of the acoustic wave in the crystal. A possibility to generate stimulated emission of high-energy photons (in keV - MeV region) is also discussed.