Coherent Cherenkov radiation as an intense THz source

11th International Symposium on Radiation from Relativistic Electrons in Periodic Structures

Bleko, V.^1 ; Karataev, P.^2 ; Konkov, A.^3 ; Kruchinin, K.^2 ; Naumenko, G.^3 ; Potylitsyn, A.^3 ; Vaughan, T.^2

RASA Center in Tomsk, Tomsk Polytechnic University, Lenin Ave. 30, Tomsk

634050, Russia^1

John Adams Institute at Royal Holloway, University of London, Egham

TW20 0EX, United Kingdom^2

Tomsk Polytechnic University, Lenin Ave. 30, Tomsk

634050, Russia^3

关键词: Absorption loss;    Cherenkov radiations;    Dielectric targets;    High energy electron beams;    Polarization current;    Relativistic electron;    Terahertz radiation;    X-ray free electron lasers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/732/1/012006/pdf
DOI  :  10.1088/1742-6596/732/1/012006

来源: IOP

【 摘 要 】

Diffraction and Cherenkov radiation of relativistic electrons from a dielectric target has been proposed as mechanism for production of intense terahertz (THz) radiation. The use of an extremely short high-energy electron beam of a 4th generation light source (X-ray free electron laser) appears to be very promising. A moderate power from the electron beam can be extracted and converted into THz radiation with nearly zero absorption losses. The initial experiment on THz observation will be performed at CLARA/VELA FEL test facility in the UK to demonstrate the principle to a wider community and to develop the radiator prototype. In this paper, we present our theoretical predictions (based on the approach of polarization currents), which provides the basis for interpreting the future experimental measurements. We will also present our hardware design and discuss a plan of the future experiment.