Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple

被引：14

作者：

de Vries, P. C. ^{[1
,2
]}

Versloot, T. W. ^{[2
]}

Salmi, A. ^{[3
]}

Hua, M-D ^{[4
]}

Howell, D. H. ^{[1
]}

Giroud, C. ^{[1
]}

Parail, V. ^{[1
]}

Saibene, G. ^{[5
]}

Tala, T. ^{[6
]}

机构：

[1] EURATOM, CCFE Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] EURATOM, FOM, FOM Inst Plasma Phys Rijnhuizen, Nieuwegein, Netherlands

[3] Aalto Univ, Assoc Euratom Tekes, Helsinki 02015, Finland

[4] Univ London Imperial Coll Sci Technol & Med, London SW7 2BY, England

[5] Fus Energy Joint Undertaking, Barcelona 0819, Spain

[6] Assoc Euratom Tekes, VTT, Espoo 02044, Finland

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2010年 / 52卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

ROTATION; PLASMA;

D O I：

10.1088/0741-3335/52/6/065004

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In this study, enhancement of the toroidal field (TF) ripple has been used as a tool in order to reveal the impact of the momentum pinch on the rotation profiles in H-mode JET discharges. The analysis showed that flatter rotation profiles were obtained in discharges with a high TF ripple, attributed to a smaller inward momentum convection. An average inward momentum pinch of approximately V-p approximate to 3.4 m s(-1) and a normalized pinch value of RVp/chi approximate to 6.6 could explain the observation. The data show that the momentum at the edge affects the peaking of the rotation and momentum density profiles. Under the assumption that the heat and momentum diffusivities are equal, an estimate of the levels of the momentum pinch in all discharges in the JET rotation database was made. For H-mode discharge these ranged from 0.3 m s(-1) < V-p < 17 m s(-1), with 2 < RVp/chi < 10. A larger momentum pinch was found in discharges with a smaller density profile gradient length, i.e. a more peaked density profile.

引用

页数：11

共 27 条

[1]

[Anonymous], 2008, P 22 INT C FUS EN 20

[2] Transport of Parallel Momentum Induced by Current-Symmetry Breaking in Toroidal Plasmas [J].

Camenen, Y. ;

Peeters, A. G. ;

Angioni, C. ;

Casson, F. J. ;

Hornsby, W. A. ;

Snodin, A. P. ;

Strintzi, D. .

PHYSICAL REVIEW LETTERS, 2009, 102 (12)

[3] Neoclassical toroidal viscosity and error-field penetration in tokamaks [J].

Cole, A. J. ;

Hegna, C. C. ;

Callen, J. D. .

PHYSICS OF PLASMAS, 2008, 15 (05)

[4] Plasma rotation and momentum transport studies at JET [J].

de Vries, P. C. ;

Rantamaki, K. M. ;

Giroud, C. ;

Asp, E. ;

Corrigan, G. ;

Eriksson, A. ;

de Greef, M. ;

Jenkins, I. ;

Knoops, H. C. M. ;

Mantica, P. ;

Nordman, H. ;

Strand, P. ;

Tala, T. ;

Weiland, J. ;

Zastrow, K-D .

PLASMA PHYSICS AND CONTROLLED FUSION, 2006, 48 (12) :1693-1708

[5] Scaling of rotation and momentum confinement in JET plasmas [J].

de Vries, P. C. ;

Hua, M. -D. ;

McDonald, D. C. ;

Giroud, C. ;

Janvier, M. ;

Johnson, M. F. ;

Tala, T. ;

Zastrow, K. -D. .

NUCLEAR FUSION, 2008, 48 (06)

[6] Effect of toroidal field ripple on plasma rotation in JET [J].

de Vries, P. C. ;

Salmi, A. ;

Parail, V. ;

Giroud, C. ;

Andrew, Y. ;

Biewer, T. M. ;

Crombe, K. ;

Jenkins, I. ;

Johnson, T. ;

Kiptily, V. ;

Loarte, A. ;

Lonnroth, J. ;

Meigs, A. ;

Oyama, N. ;

Sartori, R. ;

Saibene, G. ;

Urano, H. ;

Zastrow, K. -D. .

NUCLEAR FUSION, 2008, 48 (03)

[7] Physics of non-diffusive turbulent transport of momentum and the origins of spontaneous rotation in tokamaks [J].

Diamond, P. H. ;

McDevitt, C. J. ;

Guercan, Oe. D. ;

Hahm, T. S. ;

Wang, W. X. ;

Yoon, E. S. ;

Holod, I. ;

Lin, Z. ;

Naulin, V. ;

Singh, R. .

NUCLEAR FUSION, 2009, 49 (04)

[8] Nonlinear gyrokinetic theory of toroidal momentum pinch [J].

Hahm, T. S. ;

Diamond, P. H. ;

Gurcan, O. D. ;

Rewoldt, G. .

PHYSICS OF PLASMAS, 2007, 14 (07)

[9] EVIDENCE FOR A TOROIDAL-MOMENTUM-TRANSPORT NONDIFFUSIVE TERM FROM THE JFT-2M TOKAMAK [J].

IDA, K ;

MIURA, Y ;

MATSUDA, T ;

ITOH, K ;

HIDEKUMA, S ;

ITOH, SI .

PHYSICAL REVIEW LETTERS, 1995, 74 (11) :1990-1993

[10] Momentum transport in electron-dominated NSTX spherical torus plasmas [J].

Kaye, S. M. ;

Solomon, W. ;

Bell, R. E. ;

LeBlanc, B. P. ;

Levinton, F. ;

Menard, J. ;

Rewoldt, G. ;

Sabbagh, S. ;

Wang, W. ;

Yuh, H. .

NUCLEAR FUSION, 2009, 49 (04)

← 1 2 3 →