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Title: Experimental Characterization of Electron-Beam-Driven Wakefield Modes in a Dielectric-Woodpile Cartesian Symmetric Structure

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [1]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Accelerator Test Facility
  3. Univ. of Electronic Science and Technology of China, Chengdu (China). School of Physical Electronics
+ Show Author Affiliations

Photonic structures operating in the terahertz (THz) spectral region enable the essential characteristics of confinement, modal control, and electric field shielding for very high gradient accelerators based on wakefields in dielectrics. We report in this paper an experimental investigation of THz wakefield modes in a three-dimensional photonic woodpile structure. Selective control in exciting or suppressing of wakefield modes with a nonzero transverse wave vector is demonstrated by using drive beams of varying transverse ellipticity. Additionally, we show that the wakefield spectrum is insensitive to the offset position of strongly elliptical beams. Finally, these results are consistent with analytic theory and three-dimensional simulations and illustrate a key advantage of wakefield systems with Cartesian symmetry: the suppression of transverse wakes by elliptical beams.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Dept. of Homeland Security (DHS) (United States)
Grant/Contract Number:
SC0012704; SC0009914
OSTI ID:
1460690
Report Number(s):
BNL--207821-2018-JAAM
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 120; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Analytical treatment of the wakefields driven by transversely shaped beams in a planar slow-wave structure journal December 2018
Development and high-power testing of an X -band dielectric-loaded power extractor journal January 2020
Generation of High-Power, Reversed-Cherenkov Wakefield Radiation in a Metamaterial Structure journal January 2019
Conductivity Induced by High-Field Terahertz Waves in Dielectric Material journal September 2019
Subterahertz Photonic Crystal Klystron Amplifier journal December 2019

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