Synergistic effects between two frequencies of lower hybrid (LH) waves—operating at 2.45 and 4.6 GHz—were observed in experiment on EAST for the first time. At low density (ne,lin≈2.0×1019 m−3), simultaneous injection of a 65/35 mix of 2.45/4.6 GHz power achieved an lower hybrid current drive efficiency that was 25% higher than what should be expected from the linear combination of the two sources. The experiment was interpreted with time-dependent simulations, using the equilibrium and transport solver TRANSP, coupled with the ray-tracing code GENRAY and the Fokker–Planck solver CQL3D. For each discharge, profiles of current and hard x-rays from simulation and measurement agree within uncertainties. An examination of the electron distribution function indicates that the LH synergy is supported by the increased width of the LH resonance plateau in the simultaneous injection case compared to independent injection.
Choi, W., et al. "Observation of synergy between lower hybrid waves at two frequencies in EAST." Physics of Plasmas, vol. 28, no. 7, Jul. 2021. https://doi.org/10.1063/5.0041271
Choi, W., Poli, F. M., Li, M. H., Baek, S. G., Gorenlenkova, M., Ding, B. J., Gong, X. Z., Chan, A., Duan, Y. M., Hu, J. H., Lian, H., Lin, S. Y., Liu, H. Q., Qian, J. P., Wallace, G., Wang, Y. M., Zang, Q., & Zhao, H. L. (2021). Observation of synergy between lower hybrid waves at two frequencies in EAST. Physics of Plasmas, 28(7). https://doi.org/10.1063/5.0041271
Choi, W., Poli, F. M., Li, M. H., et al., "Observation of synergy between lower hybrid waves at two frequencies in EAST," Physics of Plasmas 28, no. 7 (2021), https://doi.org/10.1063/5.0041271
@article{osti_1807620,
author = {Choi, W. and Poli, F. M. and Li, M. H. and Baek, S. G. and Gorenlenkova, M. and Ding, B. J. and Gong, X. Z. and Chan, A. and Duan, Y. M. and Hu, J. H. and others},
title = {Observation of synergy between lower hybrid waves at two frequencies in EAST},
annote = {Synergistic effects between two frequencies of lower hybrid (LH) waves—operating at 2.45 and 4.6 GHz—were observed in experiment on EAST for the first time. At low density (ne,lin≈2.0×1019 m−3), simultaneous injection of a 65/35 mix of 2.45/4.6 GHz power achieved an lower hybrid current drive efficiency that was 25% higher than what should be expected from the linear combination of the two sources. The experiment was interpreted with time-dependent simulations, using the equilibrium and transport solver TRANSP, coupled with the ray-tracing code GENRAY and the Fokker–Planck solver CQL3D. For each discharge, profiles of current and hard x-rays from simulation and measurement agree within uncertainties. An examination of the electron distribution function indicates that the LH synergy is supported by the increased width of the LH resonance plateau in the simultaneous injection case compared to independent injection.},
doi = {10.1063/5.0041271},
url = {https://www.osti.gov/biblio/1807620},
journal = {Physics of Plasmas},
issn = {ISSN 1070-664X},
number = {7},
volume = {28},
place = {United States},
publisher = {American Institute of Physics},
year = {2021},
month = {07}}
THE 6TH INTERNATIONAL CONFERENCE ON BIOLOGICAL SCIENCE ICBS 2019: “Biodiversity as a Cornerstone for Embracing Future Humanity”, AIP Conference Proceedingshttps://doi.org/10.1063/5.0014245
THE 6TH INTERNATIONAL CONFERENCE ON BIOLOGICAL SCIENCE ICBS 2019: “Biodiversity as a Cornerstone for Embracing Future Humanity”, AIP Conference Proceedingshttps://doi.org/10.1063/5.0014299