skip to main content

This content will become publicly available on November 23, 2017

Title: Measurements of terahertz radiation generated using a metallic, corrugated pipe

Here, 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 Brookhaven's Accelerator 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 µm. 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, but with short rise time, 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. For the THz pulse we obtain and compare with calculations: the central frequency, the bandwidth, and the spectral power—compared to a diffraction radiation background signal.
 [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [4]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Euclid Techlabs LLC, Bolingbrook, IL (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Shanghai Jiao Tong Univ., Shanghai (China)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0168-9002; arXiv:1608.06337
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 844; Journal Issue: C; Journal ID: ISSN 0168-9002
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; general physics; ACCPHY; wakefields; terahertz; radiation; corrugated pipe