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Title: Monochromatic coherent transition and diffraction radiation from a relativistic electron bunch train
Authors: Naumenko, Gennadiy Andreevich
Potylitsyn, Alexander Petrovich
Shevelev, Mihail Viktorovich
Karataev, Pavel Vladimirovich
Shipulya, M.
Bleko, Vitold Vladislavovich
Keywords: accelerator applications; spectrometers; ускорители; спектрометры; когерентные переходные процессы; дифракционные излучения; электронные пучки; спектральные измерения; интерферометры
Issue Date: 2018
Publisher: IOP Publishing
Citation: Monochromatic coherent transition and diffraction radiation from a relativistic electron bunch train / G. A. Naumenko [et al.] // Journal of Instrumentation. — Bristol : IOP Publishing, 2018. — Vol. 13 : Radiation from Relativistic Electrons in Periodic Structures (RREPS-17) : XII International Symposium, 18-22 September, 2017, Hamburg, Germany : [proceedings]. — [C04007, 8 p.].
Abstract: Electron beams of most accelerators have a bunched structure and are synchronized with the accelerating RF field. Due to modulation of the electron beam with frequency v[RF] one can expect to observe resonances with frequencies vk= k·v[RF] in radiation spectrum generated via any spontaneous emission mechanism (k is an integer and the resonance order). In this paper we present the results of spectral measurements of coherent transition radiation (CTR) generated by an electron bunch train from the Tomsk microtron with v[RF]=2.63GHz in the spectral frequency range from 8 to 35 GHz. We also measured the spectrum of coherent diffraction radiation and demonstrated that the observed spectra in both cases consist of monochromatic lines. For spectral measurements the Martin-Puplett interferometer with spectral resolution of 800 MHz (FWMH) was employed. Using a waveguide frequency cut-off we were able to exclude several spectral lines to observe higher resonance orders of up to k=7.
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