Authors

Rebut, P. H.; Keen, B. E.; Huguet, M.; Dietz, K.J.; Hemmerich, J.L.; Last, J. R.; Bertolini, E.; Noll, P.; Beken, H. van der; Best, C. H.; Fullard, K.; Herzog, R. F.; Jones, Erik; Steed, C. A.; Claesen, R.; Mondino, P. L.; Duesing, G.; Altmann, H.; Falter, H.; Goede, A.; Haange, R.; Hemsworth, R.; Kupschus, P.; Stork, David G.; Thompson, Erin L.; Kaye, Andrew L.; Jacquinot, J.; Lallia, P.; Wade, T.; Millward, P.; Ainsworth, A.; Caldwell-Nichols, C.; Lobel, R.; Hancock, Charlotte; Dean, J. R.; Raimondi, T.

doi:10.13182/fst87-a24995

Cited by 12 publications

(3 citation statements)

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“…In this paper, we present experimental evidence for those modes in JET 13 and in DIII-D 14 and we investigate how accurately we can describe these RSAEs within the purely ideal magnetohydrodynamic ͑MHD͒ framework used in the a͒ Paper QI1 6, Bull. Am.…”

Section: Introductionmentioning

confidence: 99%

Interpretation of core localized Alfvén eigenmodes in DIII-D and Joint European Torus reversed magnetic shear plasmas

et al. 2006

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Reversed shear Alfvén eigenmodes ͑RSAE͒ that were observed in the Joint European Torus ͑JET͒ ͓P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 ͑1987͔͒ and DIII-D ͓J. L. Luxon, Nucl. Fusion 42, 614 ͑2002͔͒ are studied with the ideal magnetohydrodynamic code NOVA-K ͓C. Z. Cheng, Phys. Rep. 211, 1 ͑1992͔͒. It was found that the frequency behavior of the RSAEs can be described accurately by the NOVA-K code when plasma compressibility effects and toroidal plasma rotation are taken into account. For the mode activity on JET, the calculated drive exceeds the mode damping rate, consistent with experimental observations, while on DIII-D the growth rate from neutral beam ions for modes with high toroidal mode numbers is insufficient to account for the excitation of the modes and a major part of the drive comes from the background plasma.

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Section: Introductionmentioning

confidence: 99%

Interpretation of core localized Alfvén eigenmodes in DIII-D and Joint European Torus reversed magnetic shear plasmas

et al. 2006

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“…JET is currently the largest tokamak experiment in the world. The project was designed with the objectives of obtaining and studying plasmas in conditions and dimensions approaching those needed in a fusion reactor (Rebut et al 1987). JET has overall dimensions of about 15 m in diameter and 12 m in height, and the D-shaped vacuum vessel is of major radius R 0 2X96 mY with minor radii of a 1X25 m (horizontal) and b 2X10 m (vertical).…”

Section: Wav E L E N G T H M E a S U R E M E N T Smentioning

confidence: 99%

Extreme ultraviolet emission lines of Ni xii in laboratory and solar spectra

Keenan

Botha

Matthews

et al. 2000

Monthly Notices RAS

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A B S T R A C TWavelengths for emission lines arising from 3s 2 3p 5 ±3s3p 6 and 3s 2 3p 5 ±3s 2 3p 4 3d transitions in Ni xii have been measured in extreme ultraviolet spectra of the Joint European Torus (JET) tokamak. The 3s 2 3p 5 2 P 1/2 ±3s 2 3p 4 ( 3 P)3d 2 D 3/2 line is found to lie at 152X90^0X02 AY a significant improvement over the previous experimental determination of 152X95^0X5 AX This new wavelength is in good agreement with a solar identification at 152X84^0X06 AY confirming the presence of this line in the solar spectrum. The Ni xii feature at 152.15 A Ê may be a result only of the 3s 2 3p 5 2 P 3/2 ±3s 2 3p 4 ( 3 P)3d 2 D 5/2 transition, rather than a blend of this line with 3s 2 3p 5 2 P 3/2 ±3s 2 3p 4 ( 3 P)3d 2 P 1/2 , as previously suggested. Unidentified emission lines at 295.32 and 317.61 A Ê in solar flare spectra from the Skylab mission are tentatively identified as the 3s 2 3p 5 2 P 3/2 ±3s3p 6 2 S 1/2 and 3s 2 3p 5 2 P 1/2 ±3s3p 6 2 S 1/2 transitions in Ni xii, which have laboratory wavelengths of 295.33 and 317.50 A Ê , respectively. Additional support for these identifications is provided by the line intensity ratio for the solar features, which shows good agreement between theory and observation.

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“…While much effort has been spent on generating scaling laws for performance parameters, only the Ohmic temperature profile shapes have been parameterised in terms of the engineering variables [1,2,3] . In this article, we report the results of the parameterisation of the Joint European Torus [4] (JET) electron temperature profiles and density shapes for different confinement regimes. A preliminary version of this work was presented in Ref.…”

Section: Introductionmentioning

confidence: 99%

Profile shape parameterization of JET electron temperature and density profiles

Schunke

Imre²,

Riedel³

1997

Nucl. Fusion

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The temperature and density profiles of the Joint European Torus are parameterised using log-additive models in the control variables. Predictive error criteria are used to determine which terms in the log-linear model to include. The density and temperature profiles are normalised to their line averages (n and T ). The normalised Ohmic density shape depends primarily on the parameter n/B t , where B t is the toroidal magnetic field. Both the Low-mode (L-mode) and edge localized mode-free (ELM-free) high mode (H-mode) temperature profile shapes depend strongly on the type of heating power, with ion cyclotron resonant heating producing a more peaked profile than neutral beam injection. Given the heating type dependence, the L-mode temperature shape is nearly independent of the other control variables. The H-mode temperature shape broadens as the effective charge, Z ef f , increases. The line average L-mode temperature scales as B .96 t (Power per particle) .385 . The L-mode normalised density shape depends primarily on the ratio of line average density, n, to the edge safety factor, q 95 . As n/q 95 increases, the profile shape broadens. The current, I p , is the most important control variable for the normalised Hmode density. As the current increases, the profile broadens and the gradient at the edge sharpens. Increasing the heating power, especially the ion cyclotron resonant heating, or decreasing the average density, peaks the H-mode density profile slightly.

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Authors

Cited by 12 publications

References 0 publications

Interpretation of core localized Alfvén eigenmodes in DIII-D and Joint European Torus reversed magnetic shear plasmas

Interpretation of core localized Alfvén eigenmodes in DIII-D and Joint European Torus reversed magnetic shear plasmas

Extreme ultraviolet emission lines of Ni xii in laboratory and solar spectra

Profile shape parameterization of JET electron temperature and density profiles

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