Phys. Rev. Lett. 106, 164802 (2011) [4 pages]Experimental Demonstration of Wakefield Acceleration in a Tunable Dielectric Loaded Accelerating StructureReceived 28 January 2011; published 21 April 2011 We report on a collinear wakefield experiment using the first tunable dielectric loaded accelerating structure. By introducing an extra layer of nonlinear ferroelectric, which has a dielectric constant sensitive to temperature and dc bias, the frequency of a dielectric loaded accelerating structure can be tuned. During the experiment, the energy of a witness bunch at a fixed delay with respect to the drive beam was measured while the temperature of the structure was scanned over a 50 °C range. The energy change corresponded to a change of more than half of the nominal structure wavelength. © 2011 American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.106.164802
DOI:
10.1103/PhysRevLett.106.164802
PACS:
29.20.Ej, 41.75.Jv
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