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- W1971708213 abstract "ICRF heating experiments have been carried out in the Alcator C‐Mod tokamak at power levels up to 3.5 MW. Features of Alcator C‐Mod include high density operation, molybdenum plasma facing components, and a closed divertor configuration. The heating is accomplished with two two‐strap antennas each run with dipole phasing at 80 MHz in deuterium plasmas with a hydrogen minority resonant at 5.3 T. Plasmas with Ti=4 keV and Te=5 keV at n̄e=1×1020 m−3 have been produced with 3.5 MW of heating power. The heating has been shown to be strongest with a low minority concentration (1–5%) and the resonance on axis. For n̄e≳2×1020 m−3, the central Zeff remains below 1.5 with more than 2.5 MW of applied rf power. L‐mode confinement scaling is observed both for ohmic and ICRF‐heated plasmas with some deterioration at higher densities. H‐mode transitions have been produced with the threshold for ELM‐free H‐modes at or below the ASDEX/DIII‐D scaling. Enhanced confinement with strongly peaked density profiles has been achieved by lithium pellet injection. Applying 3 MW of rf power shortly after pellet penetration produces Ti0=4 keV and a factor of five increase in fusion neutron rate (up to 9×1013 s−1), and an H‐mode transition." @default.
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- W1971708213 date "1996-01-01" @default.
- W1971708213 modified "2023-10-16" @default.
- W1971708213 title "ICRF heating in the Alcator C-Mod tokamak" @default.
- W1971708213 doi "https://doi.org/10.1063/1.49586" @default.
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