U.S. Department of EnergyOffice of Scientific and Technical Information
High Field Side Launch of Lower Hybrid Waves: A Scoping Study for ADX
Abstract
Launching lower hybrid (LH) waves from the high field side (HFS) of a tokamak offers significant advantages over low field side (LFS) launch with respect to both wave physics and plasma material interactions (PMI). The higher magnetic field opens the window between wave accessibility and the condition for strong electron Landau damping, allowing LH waves from the HFS to penetrate into the core of a burning plasma, while waves launched from the LFS are restricted to the periphery of the plasma. The lower parallel refractive index (n) of waves launched from the HFS yields a higher current drive efficiency as well. The absence of turbulent heat and particle fluxes on the HFS, particularly in double null configuration, makes it the ideal location to minimize PMI damage to the antenna structure. The quiescent SOL also eliminates the need to couple LH waves across a long distance to the separatrix, as the antenna can be located close to plasma without risking damage to the structure.
- Authors:
-
- OSTI
- Publication Date:
- DOE Contract Number:
- FC02-99ER54512
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
- OSTI Identifier:
- 1882421
- DOI:
- https://doi.org/10.7910/DVN/SF0UUD
Citation Formats
Wallace, G. M., Shiraiwa, S., Baek, S. G., Bonoli, P. T., Kanojia, A. D., Koert, P., LaBombard, B. L., Leccacorvi, R., Parker, R. R., Terry, D. R., Vieira, R., and Wukitch, S. J. High Field Side Launch of Lower Hybrid Waves: A Scoping Study for ADX. United States: N. p., 2021.
Web. doi:10.7910/DVN/SF0UUD.
Wallace, G. M., Shiraiwa, S., Baek, S. G., Bonoli, P. T., Kanojia, A. D., Koert, P., LaBombard, B. L., Leccacorvi, R., Parker, R. R., Terry, D. R., Vieira, R., & Wukitch, S. J. High Field Side Launch of Lower Hybrid Waves: A Scoping Study for ADX. United States. doi:https://doi.org/10.7910/DVN/SF0UUD
Wallace, G. M., Shiraiwa, S., Baek, S. G., Bonoli, P. T., Kanojia, A. D., Koert, P., LaBombard, B. L., Leccacorvi, R., Parker, R. R., Terry, D. R., Vieira, R., and Wukitch, S. J. 2021.
"High Field Side Launch of Lower Hybrid Waves: A Scoping Study for ADX". United States. doi:https://doi.org/10.7910/DVN/SF0UUD. https://www.osti.gov/servlets/purl/1882421. Pub date:Tue May 18 04:00:00 UTC 2021
@article{osti_1882421,
title = {High Field Side Launch of Lower Hybrid Waves: A Scoping Study for ADX},
author = {Wallace, G. M. and Shiraiwa, S. and Baek, S. G. and Bonoli, P. T. and Kanojia, A. D. and Koert, P. and LaBombard, B. L. and Leccacorvi, R. and Parker, R. R. and Terry, D. R. and Vieira, R. and Wukitch, S. J.},
abstractNote = {Launching lower hybrid (LH) waves from the high field side (HFS) of a tokamak offers significant advantages over low field side (LFS) launch with respect to both wave physics and plasma material interactions (PMI). The higher magnetic field opens the window between wave accessibility and the condition for strong electron Landau damping, allowing LH waves from the HFS to penetrate into the core of a burning plasma, while waves launched from the LFS are restricted to the periphery of the plasma. The lower parallel refractive index (n) of waves launched from the HFS yields a higher current drive efficiency as well. The absence of turbulent heat and particle fluxes on the HFS, particularly in double null configuration, makes it the ideal location to minimize PMI damage to the antenna structure. The quiescent SOL also eliminates the need to couple LH waves across a long distance to the separatrix, as the antenna can be located close to plasma without risking damage to the structure.},
doi = {10.7910/DVN/SF0UUD},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 18 04:00:00 UTC 2021},
month = {Tue May 18 04:00:00 UTC 2021}
}