Author: Fedurin, M.G.
Paper Title Page
TUPOW053 Measurement of Terahertz Generation in a Metallic, Corrugated Beam Pipe 1889
  • K.L.F. Bane
    SLAC, Menlo Park, California, USA
  • S.P. Antipov
    ANL, Argonne, Illinois, USA
  • M.G. Fedurin, K. Kusche, C. Swinson
    BNL, Upton, Long Island, New York, USA
  • D. Xiang
    Shanghai Jiao Tong University, Shanghai, People's Republic of China
  Funding: Work supported by the Department of Energy, Office of Science, Office of Basic Energy Science, under Contract No. DE-AC02-76SF00515
A method for producing narrow-band THz radiation proposes passing an ultra-relativistic beam through a metallic pipe with small periodic corrugations*. We present results of a measurement of such an arrangement at BNL's Advanced Test Facility (ATF). Our pipe was copper and was 5 cm long; the aperture was cylindrically symmetric, with a 1 mm (radius) bore and a corrugation depth (peak-to-peak) of 60 um. In the experiment we measured both the effect on the beam of the structure wakefield and the spectral properties of the radiation excited by the beam. We began by injecting a relatively long beam–-compared to the wavelength of the radiation–-to excite the structure, and then used a downstream spectrometer to infer the radiation wavelength. This was followed by injecting a shorter bunch, and then using an interferometer (also downstream of the corrugated pipe) to measure the spectrum of the induced THz radiation. Our experimental set-up was simple and not optimized for the efficient collection of the radiation by e.g. the use of tapered horns. As such it can be considered a proof-of-principle experiment.
* K. Bane and G. Stupakov, NIM A677 (2012) 67-73.
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW053  
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