Channeling 2012

Session

S1.1 Coherent Bremsstrahlung

24 Sept 2012, 09:00

Alghero, Sardegna, Italy

30. High-Energy Wave Packets in Processes of Bremsstrahlung, Transition and Coherent Radiation

Prof. Nikolai Shul'ga (Akhiezer Institute for Theoretical Physics of NSC KIPT)

24/09/2012, 09:00

Coherent Bremsstrahlung

The evolution in space and time of localized high-energy wave packets which take place in processes of transition radiation and bremsstrahlung by ultra relativistic electrons is considered. It is shown that high energies make stabilizing influence upon the motion of such packets and that the lengths within which their dispersion and reconstruction into the packets of diverging waves occurs can...

104. Symmetry Properties in Angular Distribution of Radiation in Thin Crystals

Dr Micola Bondarenco (Kharkov Institute of Physics and Technology)

24/09/2012, 09:30

Radiation from an electron passing through a sufficiently thin oriented crystal is of dipole type, and so its spectral-angular distribution must be isomorphic for all species of crystals, depending only on the direction and anisotropy of the electron deflection in the crystal. The dipole radiation angular distribution, even at photon energies commensurable with the electron energy,...

27. On the Influence of a Particle's Field Evolution on its Ionization Energy Losses in Thin Layers of Substance

Mr Sergii Trofymenko (Akhiezer Institute for Theoretical Physics of NSC KIPT)

24/09/2012, 09:50

The process of evolution of electromagnetic field around a particle during its entry to a dielectric medium is considered. The influence on this field of the processes of its dispersion as of an electromagnetic wave packet as well as of its absorption in the substance is considered. The special attention is drawn to the analysis of evolution of Fourier-components of the field around the...

32. Method of Induced Currents and its Applications to the Different Problems of Polarization Radiation

Dr Dmitry Karlovets (Tomsk polytechnic university)

24/09/2012, 10:10

Coherent Bremsstrahlung

When moving in a substance or nearby some optical inhomogeneity, a charged particle produces the so-called polarization (or induced) currents, which can be considered as a source for different types of polarization radiation: Cherenkov radiation (ChR), transition radiation (TR), diffraction radiation (DR), Smith-Purcell radiation (SPR), etc. We apply the method of induced currents [1] for a...

34. Line Spectra of Electromagnetic Radiation from Relativistic Nuclei Passing through Matter

Prof. Yury Pivovarov (National Research Tomsk Polytechnic University)

24/09/2012, 10:30

Coherent Bremsstrahlung

When the relativistic nucleus penetrates through a matter, besides nuclear reactions the relativistic Coulomb excitation of projectile nucleus occurs. The de-excitation results in emission of electromagnetic radiation, characterized by continuous spectrum with broad maximum in the case of Coulomb excitation to giant dipole resonance (A.Sorensen, Channeling-2010). If the separate nuclear...