Experimental Characterization of Electron-Beam-Driven Wakefield Modes in a Dielectric-Woodpile Cartesian Symmetric Structure
- Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
- Brookhaven National Lab. (BNL), Upton, NY (United States). Accelerator Test Facility
- Univ. of Electronic Science and Technology of China, Chengdu (China). School of Physical Electronics
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 Laboratory (BNL), Upton, NY (United States); Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); Dept. of Homeland Security (DHS) (United States)
- Grant/Contract Number:
- SC0012704; SC0009914; 2014-DN-077-ARI084-01
- OSTI ID:
- 1460690
- Alternate ID(s):
- OSTI ID: 1433752
- Report Number(s):
- BNL-207821-2018-JAAM; TRN: US1901898
- Journal Information:
- Physical Review Letters, Vol. 120, Issue 16; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Subterahertz Photonic Crystal Klystron Amplifier
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journal | December 2019 |
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