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Radio Physics and Radio Astronomy

ISSN Imprimir: 2152-274X
ISSN On-line: 2152-2758

Archives: Volume 1, 2010 to Volume 3, 2012

Radio Physics and Radio Astronomy

DOI: 10.1615/RadioPhysicsRadioAstronomy.v3.i2.20
pages 103-112

A THEORY OF RADIATION BY A RELATIVISTIC CHARGED PARTICLE MOVING THROUGH A CURVED MAGNETIC FIELD: THE UNDULATOR-CURVATURE MECHANISM

Ya. M. Sobolev
Institute of Radio Astronomy, National Academy of Sciences of Ukraine, 4, Chervonopraporna St., Kharkiv, 61002, Ukraine

RESUMO

The angular and frequency spectra are derived for the radiation from an ultra-relativistic charged particle moving along a curved helical path. Contributions to the radiation intensity are due to the curvature radiation and undulator radiation mechanisms, associated with many revolutions of the particle about its drift path. The curvature radiation is plane polarized, while the undulator radiation is characterized by a circular polarization. The impact of the magnetic field-line curvature upon polarization of the undulator radiation is analyzed. A hypothesis has been put forward on the feasibility of the undulator radiation mechanism in pulsar magnetospheres.


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