Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes

The theory of Generalized Bessel Functions is reviewed and their application to various problems in the study of electro-magnetic processes is presented. We consider the cases of emission of bremsstrahlung radiation by ultra-relativistic electrons in linearly polarized undulators, including also exo...

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Main Authors: Giuseppe Dattoli, Emanuele Di Palma, Silvia Licciardi, Elio Sabia
Format: Article
Language:English
Published: MDPI AG 2021-01-01
Series:Symmetry
Subjects:
Online Access:https://www.mdpi.com/2073-8994/13/2/159
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author Giuseppe Dattoli
Emanuele Di Palma
Silvia Licciardi
Elio Sabia
author_facet Giuseppe Dattoli
Emanuele Di Palma
Silvia Licciardi
Elio Sabia
author_sort Giuseppe Dattoli
collection DOAJ
description The theory of Generalized Bessel Functions is reviewed and their application to various problems in the study of electro-magnetic processes is presented. We consider the cases of emission of bremsstrahlung radiation by ultra-relativistic electrons in linearly polarized undulators, including also exotic configurations, aimed at enhancing the harmonic content of the emitted radiation. The analysis is eventually extended to the generalization of the FEL pendulum equation to treat Free Electron Laser operating with multi-harmonic undulators. The paper aims at picking out those elements supporting the usefulness of the Generalized Bessel Functions in the elaboration of the theory underlying the study of the spectral properties of the bremsstrahlung radiation emitted by relativistic charges, along with the relevant flexibility in accounting for a large variety of apparently uncorrelated phenomenolgies, like multi-photon processes, including non linear Compton scattering.
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spelling doaj.art-63218d11840348be8052d6bab738d7c72023-12-03T13:59:54ZengMDPI AGSymmetry2073-89942021-01-0113215910.3390/sym13020159Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon ProcessesGiuseppe Dattoli0Emanuele Di Palma1Silvia Licciardi2Elio Sabia3ENEA—Frascati Research Center, Via Enrico Fermi 45, 00044 Rome, ItalyENEA—Frascati Research Center, Via Enrico Fermi 45, 00044 Rome, ItalyENEA—Frascati Research Center, Via Enrico Fermi 45, 00044 Rome, ItalyENEA—Frascati Research Center, Via Enrico Fermi 45, 00044 Rome, ItalyThe theory of Generalized Bessel Functions is reviewed and their application to various problems in the study of electro-magnetic processes is presented. We consider the cases of emission of bremsstrahlung radiation by ultra-relativistic electrons in linearly polarized undulators, including also exotic configurations, aimed at enhancing the harmonic content of the emitted radiation. The analysis is eventually extended to the generalization of the FEL pendulum equation to treat Free Electron Laser operating with multi-harmonic undulators. The paper aims at picking out those elements supporting the usefulness of the Generalized Bessel Functions in the elaboration of the theory underlying the study of the spectral properties of the bremsstrahlung radiation emitted by relativistic charges, along with the relevant flexibility in accounting for a large variety of apparently uncorrelated phenomenolgies, like multi-photon processes, including non linear Compton scattering.https://www.mdpi.com/2073-8994/13/2/159free electron lasersynchrotron radiationBessel functionsgenerating functionsintegral representation
spellingShingle Giuseppe Dattoli
Emanuele Di Palma
Silvia Licciardi
Elio Sabia
Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes
Symmetry
free electron laser
synchrotron radiation
Bessel functions
generating functions
integral representation
title Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes
title_full Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes
title_fullStr Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes
title_full_unstemmed Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes
title_short Generalized Bessel Functions and Their Use in Bremsstrahlung and Multi-Photon Processes
title_sort generalized bessel functions and their use in bremsstrahlung and multi photon processes
topic free electron laser
synchrotron radiation
Bessel functions
generating functions
integral representation
url https://www.mdpi.com/2073-8994/13/2/159
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