Channeling of Positrons through Periodically Bent Crystals: on Feasibility of Crystalline Undulator and Gamma-Laser

The electromagnetic radiation generated by ultra-relativistic positrons channelling in a crystalline undulator is discussed. The crystalline undulator is a crystal whose planes are bent periodically with the amplitude much larger than the interplanar spacing. Various conditions and criteria to be fulfilled for the crystalline undulator operation are established. Different methods of the crystal bending are described. We present the results of numeric calculations of spectral distributions of the spontaneous radiation emitted in the crystalline undulator and discuss the possibility to create the stimulated emission in such a system in analogy with the free electron laser. A careful literature survey covering the formulation of all essential ideas in this field is given. Our investigation shows that the proposed mechanism provides an efficient source for high energy photons, which is worth to study experimentally.Comment: 52 pages, MikTeX, 14 figure

Passage of fast charged particles through bent crystals and nanotubes

yesIt is shown the possibility of charged particle beam deflection by a bent nanotube due to axial channeling mechanism. Conditions for realization of this effect are discussed. Computer simulation results for relativistic charged particle beam passage through straight and bent crystals and bent nanotubes are presentedBelgorod State Universit

Passage of fast charged particles through bent crystals and nanotubes

It is shown the possibility of charged particle beam deflection by a bent nanotube due to axial channeling mechanism. Conditions for realization of this effect are discussed. Computer simulation results for relativistic charged particle beam passage through straight and bent crystals and bent nanotubes are presentedyesBelgorod State Universit

About the mechanisms of high-energy charged particle deflection by a bent crystal

yesComputer simulations of the passage of high-energy charged particle beams through a bent crystal near a crystallographic axis are presented. The influence of the magnitude of the particle charge, of the particle charge sign and of incoherent scattering processes by thermal oscillations of the crystals atoms and by the atomic electrons of the crystal on the beam deflection effieciency is considered. Conditions for the realization of deflection and splitting effects for a high-energy charged particle beam in a bent crystal are discussedBelgorod State Universit

Fast ion passing through straight and bent nanotubes

yesThe motion of fast positively charged particles in straight and bent nanotubes and ropes of nanotubes is considered. The possibility of the dynamical chaos phenomenon at scattering of such particles by nanotube is shown. The deflection of fast ions by a bent rope of nanotubes is demonstratedBelgorod State Universit

Possibility of deflecting relativistic-ion beams by bent single crystals

yesThe propagation of high-energy ions through a bent single crystal near a crystallographic axis is investigated. The results of these investigations reveal that a new mechanism of ion-beam deflection is possible in this case. This mechanism is based on multiple ion scattering by atomic strings in a bent crystal. The results obtained from a computer simulation of the effect are also presented. The effect is shown to depend strongly on the particle chargeBelgorod State Universit

About the mechanisms of high-energy charged particle deflection by a bent crystal

Computer simulations of the passage of high-energy charged particle beams through a bent crystal near a crystallographic axis are presented. The influence of the magnitude of the particle charge, of the particle charge sign and of incoherent scattering processes by thermal oscillations of the crystals atoms and by the atomic electrons of the crystal on the beam deflection effieciency is considered. Conditions for the realization of deflection and splitting effects for a high-energy charged particle beam in a bent crystal are discussedyesBelgorod State Universit

Possibility of deflecting relativistic-ion beams by bent single crystals

The propagation of high-energy ions through a bent single crystal near a crystallographic axis is investigated. The results of these investigations reveal that a new mechanism of ion-beam deflection is possible in this case. This mechanism is based on multiple ion scattering by atomic strings in a bent crystal. The results obtained from a computer simulation of the effect are also presented. The effect is shown to depend strongly on the particle chargeyesBelgorod State Universit