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1 | . // Tomsk State Pedagogical University Bulletin. 1997. Issue 1 (1). P. 90-94 . | 891 | ||||
2 | . // Tomsk State Pedagogical University Bulletin. 1997. Issue 2 (2). P. 3-4 . | 926 | ||||
3 | Basic properties of radiation of the atomic chains excited by a channeling particle are considered. Using a very simple two-dimensional model of a crystal lattice we have shown that the main part of this radiation is generated on the frequency of oscillations of a channeling particle between the crystal planes, shifted by the Doppler effect. Angular distribution of the radiation of the chain of oscillating atoms is sharply peaked in the direction of the velocity of channeling particle because of coherence of the fields, produced by individual atoms. Keywords: radiation, channeling particle, crystal lattice, angular distribution, coherence | 911 | ||||
4 | The density of energy flux of electromagnetic field generated by precessing magnetic dipole at arbitrary distance from the dipole is analyzed. It is shown that in the far field approximation only radial component of the Poynting vector exists, and it represents the intensity of radiation. In the near zone the Poynting vector has not only radial but also sufficient azimuth component. The pattern of field energy flux distribution is constructed. The obtained results can be used at research of dynamics of atmosphere of magnetized celestial bodies. Keywords: магнитный диполь, электромагнитное поле, поток энергии, электромагнитное излуче- ние, вектор Пойнтинга | 995 | ||||
5 | The eld of a rotating inclined magnetic dipole is studied. One rst integral of motion and some particular solutions of equations of motion for a charged particle in this eld are found. The effective potential energy of a charge is studied. It is shown that the effective potential energy in the corotating reference system has six stationary points, which correspond to circular motion of a charge. Keywords: magnetic dipole, electromagnetic eld, inclined rotator, charge, equations of motion | 897 | ||||
6 | The following inverse problem is discussed. A static electromagnetic field generated by a limited system of charges and currents is supposed to be known with its first derivatives at a point somewhere far from the system. This allows to reconstruct the position of the system, its net charge, and the electric and magnetic moments of the system. Keywords: inverse problem, electromagnetic field, dipole moment, charge | 805 |