Channelled position radiation in the hypersonic wave field

Coherent Pair Production in Deformed Crystals With a Complex Base

“…From the point of view of controlling the parameters of various processes in a medium, it is of interest to investigate the influence of external fields, such as acoustic waves, temperature gradient etc., on the corresponding characteristics. The considerations of concrete processes, such as diffraction radiation [4], transition radiation [5], parametric X-radiation [6], channelling radiation [7], bremsstrahlung by high-energy electrons [8], have shown that the external fields can essentially change the angular-frequency characteristics of the radiation intensities. Motivated by the fact that the basic source for the creation of positrons for high-energy electron-positron colliders is the electron-positron pair creation by high-energy photons, in [9] we have investigated the influence of the hypersonic wave excited in a crystal on this process.…”

On the Influence of Acoustic Waves on Coherent Bremsstrahlung in Crystals

“…From the point of view of controlling the parameters of the high-energy electromagnetic processes in a medium it is of interest to investigate the influence of external fields, such as acoustic waves, temperature gradient etc., on the corresponding characteristics. The considerations of concrete processes, such as diffraction radiation [7], transition radiation [8], parametric X-radiation [9], channeling radiation [10], electron-positron pair creation by high-energy photons [11] have shown that the external fields can essentially change the angular-frequency characteristics of the radiation intensities.…”

Advanced Radiation Sources and Applications

“…The emission intensity (32) takes into account both parametric X-rays , following from (31) and (32), with that, following from the general formula (31) and simplified formula (32) corresponding to the emission from a fast electron moving with (32), when this formula can be reduced to the ordinary PXR angular forming the integration in (31) over scattering angles Ψ (34) The function F (γΘ 0 ) describing the contribution of both actually PXR and diffracted bremsstrahlung must be compared with analogous function…”

“…From the viewpoint of this compulsory programme, which had to be done in order to draw a conclusion that the scheme in figure 1 can be transformed from the stage of a purely academic idea up to an observable effect and an operating device, we have reviewed critically in [14] some of the recent publications as well as the much earlier ones [27,[31][32][33][34][35][36][37]. A brief summary of a part of this critical review is presented in section 2.…”