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

CHERENKOV RADIATION IN THE FIELD OF VACUUM ULTRAVIOLET

Not scheduled

20m

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

Speaker

Vyacheslav Malyshevsky

Description

V.S. Malyshevsky, G.V. Fomin, A.R. Gucheva
Southern Federal University, Rostov-on-Don, Russia, 344090

The possibility of generating Cherenkov radiation in the ultraviolet spectral region, which occurs when accelerated charged particles pass through a regular stack of quartz glass plates 0.1 microns thick, is analyzed. In the wavelength range from 0.11 to 0.13 microns, the imaginary part of the dielectric constant is of great importance and radiation absorption prevents the appearance of the Cherenkov maximum. The range of particle energies for observing Cherenkov radiation in the "forward" direction is limited from below by the threshold condition, and from above by the total internal reflection at the exit from the target. For example, for a wavelength of 0.16 microns, the Lorentz factor should be within 1.5<γ<2.2.

Fig.1 Calculated angular distribution of radiation intensity with a wavelength of 0.16 microns of charged particles (γ = 2).

The angular distribution of the calculated radiation intensity (Fig.1) shows the maximum of Cherenkov radiation at an angle of 67 °. The additional maxima of the parametric Cherenkovsky are due to the periodic structure of the target.

REFERENCES

1. G. M. Gharibyan, Yang Shi. X-ray transient radiation. Publishing House of the Academy of Sciences of the Armenian SSR, Yerevan, 1983. 320 p.