Abstract
Static magnetic undulators used by x-ray light sources are fundamentally too limited to achieve shorter undulator periods and dynamic control. To overcome these limitations, we report experimental demonstration of a novel short-period microwave undulator, essentially a Thomson scattering device, that has yielded tunable spontaneous emission and seeded coherent radiation. Its equivalent undulator period () is 13.9 mm while it has achieved an equivalent magnetic field of 0.65 T. For future-generation light sources, this device promises a shorter undulator period, a large aperture, and fast dynamic control.
- Received 15 November 2013
DOI:https://doi.org/10.1103/PhysRevLett.112.164802
© 2014 American Physical Society
Synopsis
An Undulator Made of Microwaves
Published 23 April 2014
Experimenters use the periodically varying magnetic field along a microwave cavity to build a tunable undulator, which causes an electron beam to emit intense x rays.
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