Stationary zonal flows during the formation of the edge transport barrier in the JET tokamak

Hillesheim, J. C.; Meyer, H.; Maggi, C. F.; Meneses, L.; Poli, E.; Delabie, E.

doi:10.1103/PhysRevLett.116.065002

Title: Stationary zonal flows during the formation of the edge transport barrier in the JET tokamak

Journal Article · Wed Feb 10 00:00:00 EST 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.116.065002· OSTI ID:1263871

Hillesheim, J. C. ^[1]; Meyer, H. ^[1]; Maggi, C. F. ^[1]; Meneses, L. ^[2]; Poli, E. ^[3]; Delabie, E. ^[4]

CCFE, Culham Science Centre, Oxon (United Kingdom)
Univ. de Lisboa, Lisboa (Portugal)
Max-Planck-Institut fur Plasmaphysik, Garching (Germany)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this study, high spatial resolution Doppler backscattering measurements in JET have enabled new insights into the development of the edge E_r. We observe fine-scale spatial structures in the edge E_r well with a wave number k_rρi ≈ 0.4-0.8, consistent with stationary zonal flows, the characteristics of which vary with density. The zonal flow amplitude and wavelength both decrease with local collisionality, such that the zonal flow E x B shear increases. Above the minimum of the L-H transition power threshold dependence on density, the zonal flows are present during L mode and disappear following the H-mode transition, while below the minimum they are reduced below measurable amplitude during L mode, before the L-H transition.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1263871

Journal Information:: Physical Review Letters, Vol. 116, Issue 6; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 60 works

Citation information provided by
Web of Science

References (48)

H-mode transitions and limit cycle oscillations from mean field transport equations Staebler, Gary M.; Groebner, R. J. Plasma Physics and Controlled Fusion, Vol. 57, Issue 1 https://doi.org/10.1088/0741-3335/57/1/014025	journal	November 2014
Regime of Improved Confinement and High Beta in Neutral-Beam-Heated Divertor Discharges of the ASDEX Tokamak Wagner, F.; Becker, G.; Behringer, K. Physical Review Letters, Vol. 49, Issue 19 https://doi.org/10.1103/physrevlett.49.1408	journal	November 1982
Zonal flows in plasma—a review Diamond, P. H.; Itoh, S-I; Itoh, K. Plasma Physics and Controlled Fusion, Vol. 47, Issue 5 https://doi.org/10.1088/0741-3335/47/5/r01	journal	April 2005
Detection of Zero-Mean-Frequency Zonal Flows in the Core of a High-Temperature Tokamak Plasma Gupta, D. K.; Fonck, R. J.; McKee, G. R. Physical Review Letters, Vol. 97, Issue 12 https://doi.org/10.1103/physrevlett.97.125002	journal	September 2006
Tests of causality: Experimental evidence that sheared E×B flow alters turbulence and transport in tokamaks Burrell, Keith H. Physics of Plasmas, Vol. 6, Issue 12 https://doi.org/10.1063/1.873728	journal	December 1999
Doppler reflectometry with optimized temporal resolution for the measurement of turbulence and its propagation velocity Hirsch, M.; Holzhauer, E. Plasma Physics and Controlled Fusion, Vol. 46, Issue 4 https://doi.org/10.1088/0741-3335/46/4/002	journal	March 2004
Multiband reflectometry system for density profile measurement with high temporal resolution on JET tokamak Sirinelli, A.; Alper, B.; Bottereau, C. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3502329	journal	October 2010
Zonal flow triggers the L-H transition in the Experimental Advanced Superconducting Tokamak Manz, P.; Xu, G. S.; Wan, B. N. Physics of Plasmas, Vol. 19, Issue 7 https://doi.org/10.1063/1.4737612	journal	July 2012
H-mode access in the low density regime on JET Andrew, Y.; Sartori, R.; Righi, E. Plasma Physics and Controlled Fusion, Vol. 48, Issue 4 https://doi.org/10.1088/0741-3335/48/4/001	journal	March 2006
Experimental evidence for the key role of the ion heat channel in the physics of the L–H transition Ryter, F.; Barrera Orte, L.; Kurzan, B. Nuclear Fusion, Vol. 54, Issue 8 https://doi.org/10.1088/0029-5515/54/8/083003	journal	May 2014
The H-mode in COMPASS-D Fielding, S. J.; Ashall, J. D.; Carolan, P. G. Plasma Physics and Controlled Fusion, Vol. 38, Issue 8 https://doi.org/10.1088/0741-3335/38/8/002	journal	August 1996
Multiple scattering effect in Doppler reflectometry Gusakov, E. Z.; Surkov, A. V.; Popov, A. Yu Plasma Physics and Controlled Fusion, Vol. 47, Issue 7 https://doi.org/10.1088/0741-3335/47/7/001	journal	May 2005
Scaling of H-mode threshold power and L–H edge conditions with favourable ion grad- B drift in Alcator C-Mod tokamak Ma, Y.; Hughes, J. W.; Hubbard, A. E. Nuclear Fusion, Vol. 52, Issue 2 https://doi.org/10.1088/0029-5515/52/2/023010	journal	January 2012
Influence of sheared poloidal rotation on edge turbulence Biglari, H.; Diamond, P. H.; Terry, P. W. Physics of Fluids B: Plasma Physics, Vol. 2, Issue 1 https://doi.org/10.1063/1.859529	journal	January 1990
H-mode threshold and confinement in helium and deuterium in ASDEX Upgrade Ryter, F.; Pütterich, T.; Reich, M. Nuclear Fusion, Vol. 49, Issue 6 https://doi.org/10.1088/0029-5515/49/6/062003	journal	May 2009
Evidence for the neoclassical nature of the radial electric field in the edge transport barrier of ASDEX Upgrade Viezzer, E.; Pütterich, T.; Angioni, C. Nuclear Fusion, Vol. 54, Issue 1 https://doi.org/10.1088/0029-5515/54/1/012003	journal	December 2013
Turbulent-driven low-frequency sheared E × B flows as the trigger for the H-mode transition Tynan, G. R.; Xu, M.; Diamond, P. H. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073053	journal	July 2013
Physics of the L-mode to H-mode transition in tokamaks Burrell, K. H.; Carlstrom, T. N.; Doyle, E. J. Plasma Physics and Controlled Fusion, Vol. 34, Issue 13 https://doi.org/10.1088/0741-3335/34/13/014	journal	December 1992
Modifications in turbulence and edge electric fields at the L–H transition in the DIII‐D tokamak Doyle, E. J.; Groebner, R. J.; Burrell, K. H. Physics of Fluids B: Plasma Physics, Vol. 3, Issue 8 https://doi.org/10.1063/1.859597	journal	August 1991
First observation of a new zonal-flow cycle state in the H-mode transport barrier of the experimental advanced superconducting Tokamak Xu, G. S.; Wang, H. Q.; Wan, B. N. Physics of Plasmas, Vol. 19, Issue 12 https://doi.org/10.1063/1.4769852	journal	December 2012
A review of theories of the L-H transition Connor, J. W.; Wilson, H. R. Plasma Physics and Controlled Fusion, Vol. 42, Issue 1 https://doi.org/10.1088/0741-3335/42/1/201	journal	December 1999
L to H mode transition: on the role of Z _eff Bourdelle, C.; Maggi, C. F.; Chôné, L. Nuclear Fusion, Vol. 54, Issue 2 https://doi.org/10.1088/0029-5515/54/2/022001	journal	January 2014
Magnetic phase transitions in plasmas and transport barriers Solano, Emilia R.; Hazeltine, Richard D. Nuclear Fusion, Vol. 52, Issue 11 https://doi.org/10.1088/0029-5515/52/11/114017	journal	October 2012
Study of the conditions for spontaneous H(high)‐mode transitions in DIII‐D Carlstrom, T. N.; Groebner, R. J. Physics of Plasmas, Vol. 3, Issue 5 https://doi.org/10.1063/1.871982	journal	May 1996
One-dimensional modelling of limit-cycle oscillation and H-mode power scaling Wu, Xingquan; Xu, Guosheng; Wan, Baonian Nuclear Fusion, Vol. 55, Issue 5 https://doi.org/10.1088/0029-5515/55/5/053029	journal	April 2015
The geodesic transfer effect on zonal flows in tokamak edge turbulence Scott, B. Physics Letters A, Vol. 320, Issue 1 https://doi.org/10.1016/j.physleta.2003.10.080	journal	December 2003
Vortex dynamics and zonal flows Marcus, P. S.; Kundu, T.; Lee, Changhoon Physics of Plasmas, Vol. 7, Issue 5 https://doi.org/10.1063/1.874045	journal	May 2000
Suppression of the edge turbulence at the L-H transition in DIII-D Matsumoto, H.; Burrell, K. H.; Carlstrom, T. M. Plasma Physics and Controlled Fusion, Vol. 34, Issue 4 https://doi.org/10.1088/0741-3335/34/4/018	journal	April 1992
H-mode behavior induced by cross-field currents in a tokamak Taylor, R.; Brown, M.; Fried, B. Physical Review Letters, Vol. 63, Issue 21 https://doi.org/10.1103/physrevlett.63.2365	journal	November 1989
A new model of the L–H transition in tokamaks Fundamenski, W.; Militello, F.; Moulton, D. Nuclear Fusion, Vol. 52, Issue 6 https://doi.org/10.1088/0029-5515/52/6/062003	journal	April 2012
L–H power threshold studies in JET with Be/W and C wall Maggi, C. F.; Delabie, E.; Biewer, T. M. Nuclear Fusion, Vol. 54, Issue 2 https://doi.org/10.1088/0029-5515/54/2/023007	journal	January 2014
Experimental turbulence studies for gyro-kinetic code validation using advanced microwave diagnostics Stroth, U.; Bañón Navarro, A.; Conway, G. D. Nuclear Fusion, Vol. 55, Issue 8 https://doi.org/10.1088/0029-5515/55/8/083027	journal	July 2015
Chapter 2: Plasma confinement and transport Physics), E. J. Doyle (Chair Transport; Modelling), W. A. Houlberg (Chair Confinement Da; Edge), Y. Kamada (Chair Pedestal and Nuclear Fusion, Vol. 47, Issue 6 https://doi.org/10.1088/0029-5515/47/6/S02	journal	June 2007
Physics of Stimulated $L \to H$ Transitions Miki, K.; Diamond, P. H.; Hahn, S. -H. Physical Review Letters, Vol. 110, Issue 19 https://doi.org/10.1103/PhysRevLett.110.195002	journal	May 2013
Development of an Edge Transport Barrier at the H-Mode Transition of ASDEX Wagner, F.; Fussmann, G.; Grave, T. Physical Review Letters, Vol. 53, Issue 15 https://doi.org/10.1103/PhysRevLett.53.1453	journal	October 1984
Role of edge electric field and poloidal rotation in the L - H transition Groebner, R. J.; Burrell, K. H.; Seraydarian, R. P. Physical Review Letters, Vol. 64, Issue 25 https://doi.org/10.1103/PhysRevLett.64.3015	journal	June 1990
Steady-state convection and fluctuation-driven particle transport in the H -mode transition Tynan, G. R.; Schmitz, L.; Conn, R. W. Physical Review Letters, Vol. 68, Issue 20 https://doi.org/10.1103/PhysRevLett.68.3032	journal	May 1992
Mean and Oscillating Plasma Flows and Turbulence Interactions across the $L − H$ Confinement Transition Conway, G. D.; Angioni, C.; Ryter, F. Physical Review Letters, Vol. 106, Issue 6 https://doi.org/10.1103/PhysRevLett.106.065001	journal	February 2011
Spatiotemporal Structure of the Interaction between Turbulence and Flows at the L-H Transition in a Toroidal Plasma Estrada, T.; Hidalgo, C.; Happel, T. Physical Review Letters, Vol. 107, Issue 24 https://doi.org/10.1103/PhysRevLett.107.245004	journal	December 2011
First Evidence of the Role of Zonal Flows for the $L − H$ Transition at Marginal Input Power in the EAST Tokamak Xu, G. S.; Wan, B. N.; Wang, H. Q. Physical Review Letters, Vol. 107, Issue 12 https://doi.org/10.1103/PhysRevLett.107.125001	journal	September 2011
Role of Zonal Flow Predator-Prey Oscillations in Triggering the Transition to H-Mode Confinement Schmitz, L.; Zeng, L.; Rhodes, T. L. Physical Review Letters, Vol. 108, Issue 15 https://doi.org/10.1103/PhysRevLett.108.155002	journal	April 2012
Spatiotemporal Structures of Edge Limit-Cycle Oscillation before L-to-H Transition in the JFT-2M Tokamak Kobayashi, T.; Itoh, K.; Ido, T. Physical Review Letters, Vol. 111, Issue 3 https://doi.org/10.1103/PhysRevLett.111.035002	journal	July 2013
Poloidal Flow Driven by Ion-Temperature-Gradient Turbulence in Tokamaks Rosenbluth, M. N.; Hinton, F. L. Physical Review Letters, Vol. 80, Issue 4 https://doi.org/10.1103/PhysRevLett.80.724	journal	January 1998
Dynamics of axisymmetric and poloidal flows in tokamaks Hinton, F. L.; Rosenbluth, M. N. Plasma Physics and Controlled Fusion, Vol. 41, Issue 3A https://doi.org/10.1088/0741-3335/41/3A/059	journal	January 1999
Identification of Zonal Flows in a Toroidal Plasma Fujisawa, A.; Itoh, K.; Iguchi, H. Physical Review Letters, Vol. 93, Issue 16 https://doi.org/10.1103/PhysRevLett.93.165002	journal	October 2004
Finding the Elusive $E \times B$ Staircase in Magnetized Plasmas Dif-Pradalier, G.; Hornung, G.; Ghendrih, Ph. Physical Review Letters, Vol. 114, Issue 8 https://doi.org/10.1103/PhysRevLett.114.085004	journal	February 2015
TORBEAM, a beam tracing code for electron-cyclotron waves in tokamak plasmas Poli, E.; Peeters, A. G.; Pereverzev, G. V. Computer Physics Communications, Vol. 136, Issue 1-2 https://doi.org/10.1016/S0010-4655(01)00146-1	journal	May 2001
On the validity of the local diffusive paradigm in turbulent plasma transport Dif-Pradalier, G.; Diamond, P. H.; Grandgirard, V. Physical Review E, Vol. 82, Issue 2 https://doi.org/10.1103/PhysRevE.82.025401	journal	August 2010

Cited By (18)

Microwave frequency comb Doppler reflectometer applying fast digital data acquisition system in LHD Tokuzawa, T.; Tsuchiya, H.; Tsujimura, T. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035118	journal	October 2018
JET diagnostic enhancements testing and commissioning in preparation for DT scientific campaigns Figueiredo, J.; Murari, A.; Perez Von Thun, C. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038548	journal	October 2018
Small amplitude oscillations before the L-H transition in EAST Shao, L. M.; Xu, G. S.; Chen, R. Plasma Physics and Controlled Fusion, Vol. 60, Issue 3 https://doi.org/10.1088/1361-6587/aaa57a	journal	February 2018
A theory of self-organized zonal flow with fine radial structure in tokamak Zhang, Y. Z.; Liu, Z. Y.; Xie, T. Physics of Plasmas, Vol. 24, Issue 12 https://doi.org/10.1063/1.4995302	journal	December 2017
Zonal-flow dynamics from a phase-space perspective Ruiz, D. E.; Parker, J. B.; Shi, E. L. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4971813	journal	December 2016
Numerical simulation of the geometrical-optics reduction of CE2 and comparisons to quasilinear dynamics Parker, Jeffrey B. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5018142	journal	May 2018
Non-Oberbeck–Boussinesq zonal flow generation Held, M.; Wiesenberger, M.; Kube, R. Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad28e	journal	July 2018
ECRH effect on the electric potential and turbulence in the TJ-II stellarator and T-10 tokamak plasmas Melnikov, A. V.; Krupnik, L. I.; Ascasibar, E. Plasma Physics and Controlled Fusion, Vol. 60, Issue 8 https://doi.org/10.1088/1361-6587/aac97f	journal	June 2018
Frequency and plasma condition dependent spatial structure of low frequency global potential oscillations in the TJ-II stellarator Kobayashi, T.; Losada, U.; Liu, B. Nuclear Fusion, Vol. 59, Issue 4 https://doi.org/10.1088/1741-4326/ab0122	journal	March 2019
Geodesic acoustic mode evolution in L-mode approaching the L–H transition on JET Silva, C.; Hillesheim, J. C.; Gil, L. Plasma Physics and Controlled Fusion, Vol. 61, Issue 7 https://doi.org/10.1088/1361-6587/ab1e73	journal	May 2019
Role of isotope mass and evidence of fluctuating zonal flows during the L–H transition in the TJ-II stellarator Losada, U.; Estrada, T.; Liu, B. Plasma Physics and Controlled Fusion, Vol. 60, Issue 7 https://doi.org/10.1088/1361-6587/aac069	journal	May 2018
A gyrokinetic perspective on the JET-ILW pedestal Hatch, D. R.; Kotschenreuther, M.; Mahajan, S. Nuclear Fusion, Vol. 57, Issue 3 https://doi.org/10.1088/1741-4326/aa51e1	journal	January 2017
Using Laser-Induced Rydberg Spectroscopy diagnostic for direct measurements of the local electric field in the edge region of NSTX/NSTX-U: Modeling Reymond, L.; Diallo, A.; Vekselman, V. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038877	journal	October 2018
Overview of the JET results in support to ITER Litaudon, X.; Abduallev, S.; Abhangi, M. Nuclear Fusion, Vol. 57, Issue 10 https://doi.org/10.1088/1741-4326/aa5e28	journal	June 2017
Isotope effects on L-H threshold and confinement in tokamak plasmas Maggi, C. F.; Weisen, H.; Hillesheim, J. C. Plasma Physics and Controlled Fusion, Vol. 60, Issue 1 https://doi.org/10.1088/1361-6587/aa9901	journal	November 2017
The E × B staircase of magnetised plasmas Dif-Pradalier, G.; Hornung, G.; Garbet, X. Nuclear Fusion, Vol. 57, Issue 6 https://doi.org/10.1088/1741-4326/aa6873	journal	April 2017
Numerical simulation of the geometrical-optics reduction of CE2 and comparisons to quasilinear dynamics Parker, Jeffrey B. arXiv https://doi.org/10.48550/arxiv.1803.08643	text	January 2018
Wave kinetic equation for inhomogeneous drift-wave turbulence beyond the quasilinear approximation Ruiz, D. E.; Glinsky, M. E.; Dodin, I. Y. arXiv https://doi.org/10.48550/arxiv.1901.02518	text	January 2019

Similar Records

The role of zonal flows and predator–prey oscillations in triggering the formation of edge and core transport barriers

Journal Article · Thu Apr 24 00:00:00 EDT 2014 · Nuclear Fusion · OSTI ID:1263871

Schmitz, Lothar; Zeng, Lei; Rhodes, Terry L.; +15 more

Zonal flow sawteeth and the time period between edge-localized transport bursts in tokamaks

Journal Article · Mon Jan 15 00:00:00 EST 2007 · Physics of Plasmas · OSTI ID:1263871

Kleva, Robert G; Guzdar, Parvez N

Spectroscopic study of edge poloidal rotation and radial electric fields in the DIII-D tokamak

Conference · Mon Oct 01 00:00:00 EDT 1990 · OSTI ID:1263871

Groebner, R J; Burrell, K H; Gohil, P; +1 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Title: Stationary zonal flows during the formation of the edge transport barrier in the JET tokamak

Citation Formats

References (48)

Cited By (18)

Similar Records

Related Subjects