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Experimental Demonstration of a Tunable Microwave Undulator

Sami Tantawi, Muhammad Shumail, Jeffery Neilson, Gordon Bowden, Chao Chang, Erik Hemsing, and Michael Dunning
Phys. Rev. Lett. 112, 164802 – Published 23 April 2014
Physics logo See Synopsis: An Undulator Made of Microwaves
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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 (λu) 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.

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  • Received 15 November 2013

DOI:https://doi.org/10.1103/PhysRevLett.112.164802

© 2014 American Physical Society

Synopsis

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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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Authors & Affiliations

Sami Tantawi, Muhammad Shumail*, Jeffery Neilson, Gordon Bowden, Chao Chang, Erik Hemsing, and Michael Dunning

  • SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

  • *shumail@slac.stanford.edu
  • Present address: Laboratory of Science and Technology on High Power Microwave, NINT, Xi’an, China, 710024

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Issue

Vol. 112, Iss. 16 — 25 April 2014

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