Stationary high-performance discharges in the DIII-D tokamak. Luce, T., C., Wade, M., R., Ferron, J., R., Hyatt, A., W., Kellman, A., G., Kinsey, J., E., Haye, R., J., L., Lasnier, C., J., Murakami, M., Politzer, P., A., & Scoville, J., T. Nuclear Fusion, 43(5):321, 2003.
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Paper Website abstract bibtex Discharges which can satisfy the high gain goals of burning plasma experiments have been demonstrated in the DIII-D tokamak under stationary conditions at relatively low plasma current ( q 95 >4). A figure of merit for fusion gain (β N H 89 / q 95 2 ) has been maintained at values corresponding to Q = 10 operation in a burning plasma for >6 s or 36τ E and 2τ R . The key element is the relaxation of the current profile to a stationary state with q min >1. In the absence of sawteeth and fishbones, stable operation has been achieved up to the estimated no-wall β limit. Feedback control of the energy content and particle inventory allow reproducible, stationary operation. The particle inventory is controlled by gas fuelling and active pumping; the wall plays only a small role in the particle balance. The reduced current lessens significantly the potential for structural damage in the event of a major disruption. In addition, the pulse length capability is greatly increased, which is essential for a technology testing phase of a burning plasma experiment where fluence (duty cycle) is important.
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abstract = {Discharges which can satisfy the high gain goals of burning plasma experiments have been demonstrated in the DIII-D tokamak under stationary conditions at relatively low plasma current ( q 95 >4). A figure of merit for fusion gain (β N H 89 / q 95 2 ) has been maintained at values corresponding to Q = 10 operation in a burning plasma for >6 s or 36τ E and 2τ R . The key element is the relaxation of the current profile to a stationary state with q min >1. In the absence of sawteeth and fishbones, stable operation has been achieved up to the estimated no-wall β limit. Feedback control of the energy content and particle inventory allow reproducible, stationary operation. The particle inventory is controlled by gas fuelling and active pumping; the wall plays only a small role in the particle balance. The reduced current lessens significantly the potential for structural damage in the event of a major disruption. In addition, the pulse length capability is greatly increased, which is essential for a technology testing phase of a burning plasma experiment where fluence (duty cycle) is important.},
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author = {Luce, T C and Wade, M R and Ferron, J R and Hyatt, A W and Kellman, A G and Kinsey, J E and Haye, R J La and Lasnier, C J and Murakami, M and Politzer, P A and Scoville, J T},
journal = {Nuclear Fusion},
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}Downloads: 0
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