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Impact of nonlinear absorption on propagation of microwave in a plasma filled rectangular waveguide

Sobhani, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1080/17455030.2015.1137655
  3. Publisher: Taylor and Francis Ltd
  4. Abstract:
  5. In collisional and ponderomotive predominant regimes, the propagation of microwave in rectangular waveguide filled with collisional plasma is investigated numerically. The dominant mode is excited through an evacuated waveguide and then enters a similar and co-axis waveguide filled with plasma. In collisional predominant regime, the amplitude of electric field is oscillated along propagation path; outset of propagation path due to the electron-ion collision, the intensity oscillations are reduced. Afterward, under competition between the collisional nonlinearity and absorption, the intensity is increased, so the electron density peak is created in middle of waveguide. In ponderomotive predominant regime, the intensity is slowly decreased due to collision, so the electron density is ramped. Control parameters, like the frequency, input power, collision frequency, and background electron density are surveyed that can be used to control propagation characteristics of microwave. This method can be used to control heating of fusion plasma and accelerate charged particle
  6. Keywords:
  7. Carrier concentration ; Charged particles ; Collisional plasmas ; Electric field effects ; Electric fields ; Electron density measurement ; Electrons ; Rectangular waveguides ; Waveguides ; Collision frequency ; Control parameters ; Control propagation ; Electron-ion collision ; Fusion plasmas ; Intensity oscillations ; Nonlinear absorptions ; Propagation paths ; Electromagnetic wave propagation in plasma
  8. Source: Waves in Random and Complex Media ; Volume 26, Issue 3 , 2016 , Pages 272-283 ; 17455030 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1080/17455030.2015.1137655?journalCode=twrm20