Studies of high harmonics broadened spectrum undulators

This study suppresses effectively some unwanted harmonics and broadens the preferred harmonics by introducing a periodic gap between undulators and properly selecting the gap size. This effect is ascribed to the interference between each part of the separated undulator. Closely examining the envelop...

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Bibliographic Details
Published in:Optics communications 1998-06, Vol.152 (1), p.71-76
Main Authors: Hsu, Ian C., Fan, T.C., Tsia, Y.-H.
Format: Article
Language:English
Subjects:
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interference
Optics
Physics
Radiation by moving charges
Synchrotron radiation
Synchrotron radiation instrumentation
Undulator
Undulator radiation spectrum
Wave optics
X- and γ-ray instruments and techniques
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Summary:This study suppresses effectively some unwanted harmonics and broadens the preferred harmonics by introducing a periodic gap between undulators and properly selecting the gap size. This effect is ascribed to the interference between each part of the separated undulator. Closely examining the envelop term (i.e. the diffraction term in the case of a grating) of the undulator radiation spectrum reveals the possibility of this energy redistribution. Analytical results and numerical results are presented to confirm the idea.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(98)00136-9