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An improved energy confinement regime, I-mode is studied in Alcator C-Mod, a compact high-field divertor tokamak using Ion Cyclotron Range of Frequencies (ICRF) auxiliary heating. I-mode features an edge energy transport barrier without an accompanying particle barrier, leading to several performance benefits. H-mode energy confinement is obtained without(More)
With fusion device performance hinging on the edge pedestal pressure, it is imperative to experimentally understand the physical mechanism dictating the pedestal characteristics and to validate and improve pedestal predictive models. This Letter reports direct evidence of density and magnetic fluctuations showing the stiff onset of an edge instability(More)
A wide-frequency range (50-300 kHz) power system has been implemented for use with a new RF antenna - the "Shoelace" antenna - built to drive coherent plasma fluctuations in the edge of the Alcator C-Mod tokamak. A custom, dynamically tunable matching network allows two commercial 1 kW, 50-Ω RF amplifiers to drive the low-impedance, inductive load presented(More)
The Middle East Education Through Technology (MEET) program is a non-profit organization based in Jerusalem, that aims to empower future Israeli and Palestinian leaders by teaching them computer science and business. From the perspective of MEET's instructors, this paper describes how MEET uses computer science education to foster professional and personal(More)
A novel " Shoelace " antenna has been used to inductively excite a short-wavelength edge fluctuation in a tokamak boundary layer for the first time. The principal design parameters, k ⊥ = 1.5 ± 0.1 cm −1 and 45 < f < 300 kHz, match the Quasi-Coherent Mode (QCM, k ⊥ ∼ 1.5 cm −1 , f ∼ 50 − 150 kHz) in Alcator C-Mod, responsible for exhausting impurities in(More)
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