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Registration Number

0215U008351, 0115U003806 , R & D reports

Title

Investigation of ionization loss of high-energy electron-positron pairs which have nonequilibrium electromagnetic field

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Head

Trofymenko Sergii,

Registration Date

25-12-2015

Organization

National Science Center "Kharkiv Institute of Physics and Technology

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The major aim of the present stage was the investigation of spatial evolution of electromagnetic field which is generated during emission of high-energy electron-positron pair from substance into vacuum. For this field the general expressions in the form of double Fourier integrals are obtained. The analytical expressions for the Fourier components of this field on small and large distances from the substance, from which the pair is emitted, are derived. The influence of the interference of each particle's own field with transition radiation field (packet of free waves), which is generated during emission of the corresponding particle from substance, upon the spatial energy distribution is investigated. The analogous investigation is made for the interference of the particle's own Coulomb fields and interference of transition radiation fields with each other. It is shown that in the considered situation the interference effects significantly influence upon the energy distribution in the space around the pair on much larger distances along the average direction of the particles motion than in the case when the pair, after being created, continues moving inside the substance. In this case both the regions of space with constructive and destructive interference exist, which may result respectively in increase and decrease of the intensity of further interaction of such pair with substance. The conditions under which the manifestation of such interference effects is possible within large macroscopic distances from the substance are obtained. It is shown that the interference of the particles' own fields and the interference of the fields of the free wave packets with each other have principally different character. This difference lies in the fact that the interference of the first type ceases to influence the field energy distribution on some distance from the substance, which is defined by the pair energy and the considered frequency of the field, while the one of the second type under certain conditions can exist on arbitrary large values of this distance.

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2020-04-02