Semiclassical Description of Undulator Radiation
| Autor: | D. M. Gitman, Andrew Levin, V. G. Bagrov, A. A. Shishmarev |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Electromagnetic field
Physics RADIAÇÃO ELETROMAGNÉTICA ондуляторное излучение General Physics and Astronomy Semiclassical physics Electron Undulator 01 natural sciences Electromagnetic radiation квазиклассическое приближение квантовое электромагнитное поле Quantum state Quantum electrodynamics 0103 physical sciences Classical electromagnetism электромагнитное излучение 010306 general physics Quantum |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Journal of experimental and theoretical physics. 2021. Vol. 132, № 2. P. 247-256 |
| Popis: | We present a semiclassical approximation for treating the radiation from classical currents. In particular, we present exact quantum states of the quantized electromagnetic field interacting with classical currents. These states are used to calculate a probability of many-photon radiation from the vacuum initial state of the electromagnetic field. In this manner, in the present article, we study characteristics of electromagnetic radiation of a planar undulator. We find the total radiated energy and its spectral-angular distribution. We compare our results with ones obtained in the framework of classical electrodynamics, discussing differences introduced by accurate accounting for the quantum nature of electromagnetic radiation and present results of some numerical calculations that confirm, in particular, the latter discussion. In Appendix we present the calculation of the radiated energy using an alternative parametrization of the trajectory of electrons moving in a planar undulator. |
| Databáze: | OpenAIRE |
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