Radiation from Relativistic Electrons in Periodic Structures "RREPS-15"

THz radiation under noncentral propagation of electrons through periodical channel

8 Sept 2015, 18:00

1h 30m

Poster 4. Diffraction Radiation, Smith-Purcell Effect Poster Section

Speaker

Alexsandr Ponomarenko (National Research Nuclear University “MEPhI”)

Description

Generation of electromagnetic radiation in the frequency region of terahertz (THz) has attracted ever-growing attention for its fundamental significance and interesting applications. In our previous work [1] we investigated source of THz radiation based on electrons moving through the channel with variable radius, where radiation arises due to Cherenkov (CR) and Smith-Purcell (SPR). It was shown that mechanism of SPR could be used as powerful source of THz radiation. In order to correct theoretical model and approach experimental conditions at LUCX facility in KEK in Japan , it would be very useful to investigate radiation under noncentral propagation at distance b from axis of corrugated channel. Theoretical model describing noncentral propagation is discussed. Numerical calculations are performed and radiation characteristics, for noncentral case are compared with those for central electrons propagation. Intensity dependence of SPR and CR peaks on distance b is investigated for different target parameters. 1. A.A. Ponomarenko, A.A. Tishchenko, M.N. Strikhanov, M.I. Ryazanov, Terahertz radiation from electrons moving through a waveguide with variable radius, based on Smith-Purcell and Cherenkov mechanisms, NIM B; 309 223 (2012)