XV International Symposium on "Radiation from Relativistic Electrons in Periodic Structures "RREPS-25"

Investigation of Spectral Parameters of Coherent Cherenkov Radiation Emitted by Pair Electron Bunches at the AREAL Accelerator

16 Sept 2025, 13:55

25m

Invited • Transition Radiation, Diffraction Radiation, Cherenkov radiation, and Smith-Purcell Effect Transition Radiation, Diffraction Radiation, Cherenkov radiation, and Smith-Purcell Effect

Speaker

Dr Vahan Kocharyan (Institute of Applied Problems of Physics of NAS RA)

Description

This study presents experimental findings on the spectral characteristics of coherent Cherenkov radiation generated by two electron bunches at the AREAL Accelerator. A cylindrical Teflon resonator employed as the radiation target. The study investigates the dependence of coherent radiation on the delay between the electron bunches (from 2 to 11 picoseconds). Detection was carried out using a QOD (Quasi-Optical Detector equipped with a Schottky Barrier Diode), capable of measuring frequencies in the 30–1000 GHz range and two narrowband Schottky barrier diode detectors equipped with waveguide pyramidal horn antennae designed for frequncy regions of 33–50 GHz and 90–140 GHz. A measurement scheme based on the Martin–Puplett interferometer was employed to analyze the spectral characteristics of the detected radiation. The results were analysed in comparison with earlier experimental data and theoretical predictions.

The work was partially supported by the Science Committee of RA, in the frames of the research project № 21AG–1C069.