skip to main content

DOE PAGESDOE PAGES

Title: Superimposed coherent terahertz wave radiation from mono-energetically bunched multi-beam

Intense coherent radiation is obtained from multiple electron beams monochromatically bunched over the wide higher-order-mode (HOM) spectral band in the THz regime. The overmoded waveguide corrugated by dielectric-implanted staggered gratings superimposes evanescent waves emitted from the low energy electron beams. The dispersion and transmission simulations of the three-beam slow wave structure show that the first two fundamental modes ($$TE_{10}$$ and $$TE_{20}$$) are considerably suppressed ($$\sim-50$$ dB) below the multi-beam resonating mode ($$TE_{30}$$) at the THz regime (0.8–1.24 THz). The theoretical calculations and particle-in-cell simulations show that with significantly higher interaction impedance and power growth rate radiation of the $$TE_{30}$$ mode is $$\sim$$23 dBm and $$\sim$$50 dBm stronger than the $$TE_{10}$$ and $$TE_{20}$$ modes around 1 THz, respectively. As a result, this highly selective HOM multi-beam interaction has potential applications for power THz sources and high intensity accelerators.
Authors:
 [1] ;  [2]
  1. Northern Illinois Univ., DeKalb, IL (United States)
  2. (FNAL), Batavia, IL (United States)
Publication Date:
OSTI Identifier:
1235046
Report Number(s):
FERMILAB-PUB--12-908-APC
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 19; Journal Issue: 6; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY dielectrics; particle-in-cell method; terahertz radiation; energy efficiency; electron beams