This work opens a series of papers where we develop a general quasi-optical theory for mode-converting electromagnetic beams in plasma and implement it in a numerical algorithm. Here, the basic theory is introduced. We consider a general quasimonochromatic multicomponent wave in a weakly inhomogeneous linear medium with no sources. For any given dispersion operator that governs the wave field, we explicitly calculate the approximate operator that governs the wave envelope ψ to the second order in the geometrical-optics parameter. Then, we further simplify this envelope operator by assuming that the gradient of ψ transverse to the local group velocity is much larger than the corresponding parallel gradient. This leads to a parabolic differential equation for ψ (“quasioptical equation”) on the basis of the geometrical-optics polarization vectors. Scalar and mode-converting vector beams are described on the same footing. Here, we also explain how to apply this model to electromagnetic waves in general. In the next papers of this series, we report successful quasioptical modeling of radio frequency wave beams in magnetized plasma based on this theory.
Dodin, I. Y., et al. "Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory." Physics of Plasmas, vol. 26, no. 7, Jul. 2019. https://doi.org/10.1063/1.5095076
Dodin, I. Y., Ruiz, D. E., Yanagihara, K., Zhou, Y., & Kubo, S. (2019). Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory. Physics of Plasmas, 26(7). https://doi.org/10.1063/1.5095076
Dodin, I. Y., Ruiz, D. E., Yanagihara, K., et al., "Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory," Physics of Plasmas 26, no. 7 (2019), https://doi.org/10.1063/1.5095076
@article{osti_1557568,
author = {Dodin, I. Y. and Ruiz, D. E. and Yanagihara, K. and Zhou, Y. and Kubo, S.},
title = {Quasioptical modeling of wave beams with and without mode conversion. I. Basic theory},
annote = {This work opens a series of papers where we develop a general quasi-optical theory for mode-converting electromagnetic beams in plasma and implement it in a numerical algorithm. Here, the basic theory is introduced. We consider a general quasimonochromatic multicomponent wave in a weakly inhomogeneous linear medium with no sources. For any given dispersion operator that governs the wave field, we explicitly calculate the approximate operator that governs the wave envelope ψ to the second order in the geometrical-optics parameter. Then, we further simplify this envelope operator by assuming that the gradient of ψ transverse to the local group velocity is much larger than the corresponding parallel gradient. This leads to a parabolic differential equation for ψ (“quasioptical equation”) on the basis of the geometrical-optics polarization vectors. Scalar and mode-converting vector beams are described on the same footing. Here, we also explain how to apply this model to electromagnetic waves in general. In the next papers of this series, we report successful quasioptical modeling of radio frequency wave beams in magnetized plasma based on this theory.},
doi = {10.1063/1.5095076},
url = {https://www.osti.gov/biblio/1557568},
journal = {Physics of Plasmas},
issn = {ISSN 1070-664X},
number = {7},
volume = {26},
place = {United States},
publisher = {American Institute of Physics (AIP)},
year = {2019},
month = {07}}
USDOE National Nuclear Security Administration (NNSA); Japan Society for the Promotion of Science (JSPS)
Contributing Organization:
National Institute of Fusion Science, Japan. This work was supported by JSPS KAKENHI Grant No. JP17H03514 and by the U.S. DOE through Contract No. DE-AC02-09CH11466 and by the Laboratory Directed Research and Development program at Sandia National Laboratories, under Contract No. DE-NA-0003525.
Grant/Contract Number:
NA0003525; AC02-09CH11466; AC04-94AL85000
OSTI ID:
1557568
Alternate ID(s):
OSTI ID: 1544458 OSTI ID: 1634798
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 26; ISSN 1070-664X