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Isotope dependence ...
Isotope dependence of energy, momentum and particle confinement in tokamaks
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- Weisen, H. (author)
- Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL),Ecole Polytech Fed Lausanne EPFL, Swiss Plasma Ctr SPC, CH-1015 Lausanne, Switzerland.
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- Maggi, C. F. (author)
- Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
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- Oberparleiter, Michael, 1986 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, SE-41296 Gothenburg, Sweden.
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- Casson, F. J. (author)
- Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
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- Camenen, Y. (author)
- Aix-Marseille Université,Aix Marseille University,Aix Marseille Univ, CNRS, UMR7345, PIIM, Marseille, France.
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- Menmuir, S. (author)
- Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
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- Horvath, L. (author)
- University of York,Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.;Univ York, York Plasma Inst, Dept Phys, York YO10 5DD, N Yorkshire, England.
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- Auriemma, F. (author)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.
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- Bache, T. W. (author)
- Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
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- Bonanomi, N. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Inst Plasma Phys, D-85748 Garching, Germany.
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- Chankin, A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Inst Plasma Phys, D-85748 Garching, Germany.
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- Delabie, E. (author)
- Oak Ridge National Laboratory,Oak Ridge Natl Lab, Oak Ridge, TN USA.
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- Frassinetti, Lorenzo (author)
- KTH,Fusionsplasmafysik,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Garcia, J. (author)
- Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA),CEA, Cadarache, France.
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- Giroud, C. (author)
- Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
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- King, D. (author)
- Culham Science Centre,Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
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- Lorenzini, R. (author)
- Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy.
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- Marin, M. (author)
- Dutch Institute for Fundamental Energy Research (DIFFER),DIFFER Dutch Inst Fundamental Energy Res, Eindhoven, Netherlands.
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- Schneider, P. A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Inst Plasma Phys, D-85748 Garching, Germany.
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- Siren, P. (author)
- Teknologian Tutkimuskeskus (VTT),Technical Research Centre of Finland (VTT),Aalto-Yliopisto,Aalto University,Aalto Univ, Espoo, Finland.;VTT, Espoo, Finland.
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- Varje, J. (author)
- Teknologian Tutkimuskeskus (VTT),Technical Research Centre of Finland (VTT),VTT, Espoo, Finland.
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- Viezzer, E. (author)
- Universidad de Sevilla,University of Seville,Univ Seville, Seville, Spain.
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Ecole Polytechnique Federale de Lausanne (EPFL) Ecole Polytech Fed Lausanne EPFL, Swiss Plasma Ctr SPC, CH-1015 Lausanne, Switzerland (creator_code:org_t)
- Cambridge University Press, 2020
- 2020
- English.
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In: Journal of Plasma Physics. - : Cambridge University Press. - 0022-3778 .- 1469-7807. ; 86:5
- Related links:
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https://doi.org/10.1...
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Abstract
Subject headings
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- The isotope dependence of plasma transport will have a significant impact on the performance of future D-T experiments in JET and ITER and eventually on the fusion gain and economics of future reactors. In preparation for future D-T operation on JET, dedicated experiments and comprehensive transport analyses were performed in H, D and H-D mixed plasmas. The analysis of the data has demonstrated an unexpectedly strong and favourable dependence of the global confinement of energy, momentum and particles in ELMy H-mode plasmas on the atomic mass of the main ion species, the energy confinement time scaling as tau(E) similar to A(0.5) (Maggi et al., Plasma Phys. Control. Fusion, vol. 60, 2018, 014045; JET Team, Nucl. Fusion, vol. 39, 1999, pp. 1227-1244), i.e. opposite to the expectations based only on local gyro-Bohm (GB) scaling, tau(E) similar to A(-0.5), and stronger than in the commonly used H-mode scaling for the energy confinement (Saibene et al., Nucl. Fusion, vol. 39, 1999, 1133; ITER Physics Basis, Nucl. Fusion, vol. 39, 1999, 2175). The scaling of momentum transport and particle confinement with isotope mass is very similar to that of energy transport. Nonlinear local GENE gyrokinetic analysis shows that the observed anti-GB heat flux is accounted for if collisions, ExB shear and plasma dilution with low-Z impurities (Be-9) are included in the analysis (E and B are, respectively the electric and magnetic fields). For L-mode plasmas a weaker positive isotope scaling tau(E) similar to A(0.14) has been found in JET (Maggi et al., Plasma Phys. Control. Fusion, vol. 60, 2018, 014045), similar to ITER97-L scaling (Kaye et al., Nucl. Fusion, vol. 37, 1997, 1303). Flux-driven quasi-linear gyrofluid calculations using JETTO-TGLF in L-mode show that local GB scaling is not followed when stiff transport (as is generally the case for ion temperature gradient modes) is combined with an imposed boundary condition taken from the experiment, in this case predicting no isotope dependence. A dimensionless identity plasma pair in hydrogen and deuterium L-mode plasmas has demonstrated scale invariance, confirming that core transport physics is governed, as expected, by the 4 dimensionless parameters rho*, nu*, beta, q (normalised ion Larmor radius, collisionality, plasma pressure and safety factor) consistently with global quasi-linear gyrokinetic TGLF calculations (Maggi et al., Nucl. Fusion, vol. 59, 2019, 076028). We compare findings in JET with those in different devices and discuss the possible reasons for the different isotope scalings reported from different devices. The diversity of observations suggests that the differences may result not only from differences affecting the core, e.g. heating schemes, but are to a large part due to differences in device-specific edge and wall conditions, pointing to the importance of better understanding and controlling pedestal and edge processes.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- plasma properties
- plasma confinement
- fusion plasma
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Weisen, H.
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Maggi, C. F.
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Oberparleiter, M ...
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Casson, F. J.
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Camenen, Y.
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Menmuir, S.
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show more...
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Horvath, L.
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Auriemma, F.
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Bache, T. W.
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Bonanomi, N.
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Chankin, A.
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Delabie, E.
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Frassinetti, Lor ...
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Garcia, J.
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Giroud, C.
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King, D.
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Lorenzini, R.
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Marin, M.
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Schneider, P. A.
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Siren, P.
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Varje, J.
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Viezzer, E.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Journal of Plasm ...
- By the university
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Chalmers University of Technology
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Royal Institute of Technology