Channeling of electrons and positrons in straight and periodically bent diamond(110) crystals

Abstract

In this paper we present the results from systematic analysis of the channeling properties of electrons and positrons in a straight and periodically bent diamond(110) crystals. We theoretically analyse the dependence of channeling and undulator radiation for the periodically bent crystals intensity on the energy of the particle as well as on bending amplitude of the crystal. The presented analisis are based on the grounds of accurate numerical simulations of the channeling process. The simulation parameters, such as the crystalline orientation, length and bending parameters of the diamond crystals as well as the energy of the projectiles, were chosen to match ones in past and ongoing experiments. The non-linear evolution of the radiation spectra was explained by the interplay of various radiation mechanisms in these systems. Such an analysis can be used to predict and explain future experimental results. PACS. 61.85.+p Channeling phenomena -41.60.-m Radiation by moving charges -41.75.Ht Relativistic electron and positron beams -02.70.Uu Applications of Monte Carlo methods -07.85.Fv X-and γ-ray sources, mirrors, gratings, and detectors

Special issue: Dynamics of systems on the nanoscale (2018). Editorial

“…These software packages have been designed to become powerful and universal instruments of computational research in the field of MBN Science, which should play a role of a "virtual microscope" and a "camera" capable to explore, simulate, record and visualize both structure and dynamics of the MBN-world with an atomistic level of accuracy, in order to both reproduce its known features and predict the new ones. In this Topical Issue, many contributions [12][13][14][15][16][17][18][19][20][21][22][24][25][26][27][28][29][30][31][32][33][34][35] provide case studies conducted with these packages and demonstrate their application to a broad variety of topical areas in MBN science as listed at the beginning of this Editorial. To be noted that these universal and powerful software packages are fully applicable to a broad variety of the topical areas of the MBN Science listed above in the introductory part of the Editorial.…”

“…Pavlov et al [33] report systematic numerical analysis of the channeling properties for electrons and positrons in oriented straight and periodically bent diamond(110) crystals that can be utilised for the construction of novel crystal based light sources operating in the photon energy range 1−10 MeV, an energy range inaccessible to conventional synchrotrons, undulators and XFELs. The dependence of intensity of radiation emitted upon the projectile energy as well as on the bending amplitude was analysed using accurate numerical simulations of the channeling process.…”

MBN explorer atomistic simulations of 855 MeV electron propagation and radiation emission in oriented silicon bent crystal: theory versus experiment

“…A number of simulations have been performed for electrons and positrons of the sub-GeV and GeV energies channeling in straight, bent and periodically bent silicon, diamond and tungsten crystals [40,[48][49][50][51][52][53][54][55] including comparison and benchmarking against experimental data [39,[55][56][57][58].…”

Advances in multiscale modeling for novel and emerging technologies

“…Verification of the channeling module of MBN Explorer against experimental data as well as predictions of other theoretical models has been carried out in a large number of publications [24,33,42,[49][50][51][52][53], where channeling of electrons and positions in straight, bent and periodically bent crystals was studied, and the radiation spectra were calculated and successfully compared to experimental data.…”