This title appears in the Scientific Report :
2002
Please use the identifier:
http://dx.doi.org/10.1088/0741-3335/44/9/307 in citations.
Please use the identifier: http://hdl.handle.net/2128/1763 in citations.
Comparison of L-mode regimes with enhanced confinement by impurity seeding in JET and DIII-D
Comparison of L-mode regimes with enhanced confinement by impurity seeding in JET and DIII-D
Impurity seeding in both the Joint European Torus (JET) and DIII-D tokamaks has produced L-mode discharges with confinement enhancements comparable to H-mode and a near doubling of the core ion temperature when compared,to similar unseeded discharges. Although Z(eff) increases with the neon injectio...
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Personal Name(s): | Jackson, G. L. |
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Murakami, M. / Baker, D. R. / Budny, R. / de Baar, M. R. / Evans, T. E. / Groebner, R. J. / Hawkes, N. C. / Hillis, D. L. / Ingesson, L. C. / Koslowski, H. R. / Lawson, K. D. / Maddison, G. / Mc Kee, G. R. / Messiaen, A. M. / Monier-Garbet, P. / Nave, M. F. F. / Ongena, J. / Rapp, J. / Sartori, F. / Staebler, G. M. / Stamp, M. / Strachan, J. D. / Tokar, A. D. / Unterberg, B. / von Hellermann, M. / Wade, M. R. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Plasma physics and controlled fusion, 44 (2002) S. 1893 - 1902 |
Imprint: |
Bristol
IOP Publ.
2002
|
Physical Description: |
1893 - 1902 |
DOI: |
10.1088/0741-3335/44/9/307 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Plasma Physics and Controlled Fusion
44 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1763 in citations.
Impurity seeding in both the Joint European Torus (JET) and DIII-D tokamaks has produced L-mode discharges with confinement enhancements comparable to H-mode and a near doubling of the core ion temperature when compared,to similar unseeded discharges. Although Z(eff) increases with the neon injection, the total neutron rate is as high, or higher, than reference discharges and the calculated thermal neutron rate increases dramatically in both devices. Modelling with the gyrokinetic simulation code shows a reduction in low k turbulence growth rates with neon injection decreasing to less than the E x B shearing rate, consistent with stabilization of ion temperature gradient modes in both JET and DIII-D. Reductions in ion thermal diffusivity are also observed with impurity seeding. Neoclassical m/n = 3/2 tearing modes limit the duration of best performance in DIII-D with neon injection, while n = 1 and n = 2 magnetohydrodynamic modes limit the performance in JET. |