When does turbulence spreading matter?
Abstract
Few, if any, of the many papers on turbulence spreading address the key question of how turbulence spreading actually affects the profile structure. In this work, we are using a reduced model to answer that question. Turbulence spreading is most relevant near regions where the profiles support a strong intensity gradient ∇I. One such case is at the edge of an L mode ischarge, near a source of turbulence [i.e., either a localized source of edge turbulence or an influx of turbulence from the scrape-off layer (SOL)]. Another is in “No Man’s Land” (NML), which connects the pedestal to the stiff core in H mode. In the case of L mode, without an edge intensity source, the turbulence intensity profile is nearly flat and spreading has a weak effect. An edge localized source increases the edge ∇I, which then drives inward spreading. Invasion of turbulence from the SOL to the edge softens the edge pressure gradient. In H mode, the strong shear suppression of pedestal turbulence necessarily forces a sharp ∇I in NML. This sharp∇I drives a significant flux of turbulence from the core to the pedestal, where it is ultimately dissipated by shearing. Counter-intuitively, the results indicate that spreadingmore »
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1615004
- Alternate Identifier(s):
- OSTI ID: 1615076
- Grant/Contract Number:
- FG02-04ER54738
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 4; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Singh, Rameswar, and Diamond, P. H. When does turbulence spreading matter?. United States: N. p., 2020.
Web. doi:10.1063/1.5117835.
Singh, Rameswar, & Diamond, P. H. When does turbulence spreading matter?. United States. https://doi.org/10.1063/1.5117835
Singh, Rameswar, and Diamond, P. H. Thu .
"When does turbulence spreading matter?". United States. https://doi.org/10.1063/1.5117835. https://www.osti.gov/servlets/purl/1615004.
@article{osti_1615004,
title = {When does turbulence spreading matter?},
author = {Singh, Rameswar and Diamond, P. H.},
abstractNote = {Few, if any, of the many papers on turbulence spreading address the key question of how turbulence spreading actually affects the profile structure. In this work, we are using a reduced model to answer that question. Turbulence spreading is most relevant near regions where the profiles support a strong intensity gradient ∇I. One such case is at the edge of an L mode ischarge, near a source of turbulence [i.e., either a localized source of edge turbulence or an influx of turbulence from the scrape-off layer (SOL)]. Another is in “No Man’s Land” (NML), which connects the pedestal to the stiff core in H mode. In the case of L mode, without an edge intensity source, the turbulence intensity profile is nearly flat and spreading has a weak effect. An edge localized source increases the edge ∇I, which then drives inward spreading. Invasion of turbulence from the SOL to the edge softens the edge pressure gradient. In H mode, the strong shear suppression of pedestal turbulence necessarily forces a sharp ∇I in NML. This sharp∇I drives a significant flux of turbulence from the core to the pedestal, where it is ultimately dissipated by shearing. Counter-intuitively, the results indicate that spreading actually increases the pedestal height and width and hence the energy content in H mode. This suggests that models of the pedestal structure should include NML turbulence spreading effects. The relation of avalanches to spreading is studied. Spreading weakly affects the avalanche distribution, but the spatiotemporal correlation of intensity increases with spreading.},
doi = {10.1063/1.5117835},
journal = {Physics of Plasmas},
number = 4,
volume = 27,
place = {United States},
year = {Thu Apr 16 00:00:00 EDT 2020},
month = {Thu Apr 16 00:00:00 EDT 2020}
}
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Works referenced in this record:
Spatio-temporal evolution of the L → I → H transition
journal, September 2012
- Miki, K.; Diamond, P. H.; Gürcan, Ö. D.
- Physics of Plasmas, Vol. 19, Issue 9
The rise of fully turbulent flow
journal, October 2015
- Barkley, Dwight; Song, Baofang; Mukund, Vasudevan
- Nature, Vol. 526, Issue 7574
A model realization of self‐organized criticality for plasma confinement
journal, August 1996
- Carreras, B. A.; Newman, D.; Lynch, V. E.
- Physics of Plasmas, Vol. 3, Issue 8
Turbulence propagation in heat flux-driven plasmas: implications for temperature profile structure
journal, May 2011
- Wang, Z. H.; Diamond, P. H.; Gürcan, Ö. D.
- Nuclear Fusion, Vol. 51, Issue 7
Plasma Turbulence Imaging via Beam Emission Spectroscopy in the Core of the DIII-D Tokamak
journal, January 2007
- McKEE, George R.; Fonck, Raymond J.; Gupta, Deepak K.
- Plasma and Fusion Research, Vol. 2
Particle and energy confinement bifurcation in tokamaks
journal, April 1993
- Hinton, F. L.; Staebler, G. M.
- Physics of Fluids B: Plasma Physics, Vol. 5, Issue 4
Turbulence spreading and transport scaling in global gyrokinetic particle simulations
journal, March 2004
- Lin, Z.; Hahm, T. S.
- Physics of Plasmas, Vol. 11, Issue 3
Fluctuation-induced heat transport results from a large global 3D toroidal particle simulation model
journal, December 1996
- Sydora, R. D.; Decyk, V. K.; Dawson, J. M.
- Plasma Physics and Controlled Fusion, Vol. 38, Issue 12A
Linking the micro and macro: L-H transition dynamics and threshold physics
journal, March 2015
- Malkov, M. A.; Diamond, P. H.; Miki, K.
- Physics of Plasmas, Vol. 22, Issue 3
A flux-matched gyrokinetic analysis of DIII-D L-mode turbulence
journal, December 2014
- Görler, T.; White, A. E.; Told, D.
- Physics of Plasmas, Vol. 21, Issue 12
Behaviour of turbulent transport in the vicinity of a magnetic island
journal, May 2009
- Poli, E.; Bottino, A.; Peeters, A. G.
- Nuclear Fusion, Vol. 49, Issue 7
Large scale dynamics in flux driven gyrokinetic turbulence
journal, April 2010
- Sarazin, Y.; Grandgirard, V.; Abiteboul, J.
- Nuclear Fusion, Vol. 50, Issue 5
Bistable dynamics of turbulence spreading in a corrugated temperature profile
journal, October 2017
- Guo, Z. B.; Diamond, P. H.
- Physics of Plasmas, Vol. 24, Issue 10
Multiscale interaction between a large scale magnetic island and small scale turbulence
journal, October 2017
- Choi, M. J.; Kim, J.; Kwon, J. -M.
- Nuclear Fusion, Vol. 57, Issue 12
Bifurcation of quiescent H-mode to a wide pedestal regime in DIII-D and advances in the understanding of edge harmonic oscillations
journal, June 2017
- Chen, Xi; Burrell, K. H.; Osborne, T. H.
- Nuclear Fusion, Vol. 57, Issue 8
Stationary QH-mode plasmas with high and wide pedestal at low rotation on DIII-D
journal, September 2016
- Chen, Xi; Burrell, K. H.; Osborne, T. H.
- Nuclear Fusion, Vol. 57, Issue 2
Transport barrier fluctuations governed by SOL turbulence spreading
journal, June 2007
- Ghendrih, Ph.; Sarazin, Y.; Ciraolo, G.
- Journal of Nuclear Materials, Vol. 363-365
Drift waves and transport
journal, April 1999
- Horton, W.
- Reviews of Modern Physics, Vol. 71, Issue 3
Measurement of Turbulence Decorrelation during Transport Barrier Evolution in a High-Temperature Fusion Plasma
journal, April 2005
- Nazikian, R.; Shinohara, K.; Kramer, G. J.
- Physical Review Letters, Vol. 94, Issue 13
The dynamics of marginality and self‐organized criticality as a paradigm for turbulent transport
journal, May 1996
- Newman, D. E.; Carreras, B. A.; Diamond, P. H.
- Physics of Plasmas, Vol. 3, Issue 5
Gyrokinetic and gyrofluid investigation of magnetic islands in tokamaks
journal, November 2010
- Poli, E.; Bottino, A.; Hornsby, W. A.
- Plasma Physics and Controlled Fusion, Vol. 52, Issue 12
Properties of microturbulence in toroidal plasmas with reversed magnetic shear
journal, October 2009
- Deng, Wenjun; Lin, Zhihong
- Physics of Plasmas, Vol. 16, Issue 10
Secondary instability of wall-bounded shear flows
journal, March 1983
- Orszag, Steven A.; Patera, Anthony T.
- Journal of Fluid Mechanics, Vol. 128, Issue -1
Gyrokinetic simulation of isotope effects in tokamak plasmas
journal, January 1997
- Lee, W. W.; Santoro, R. A.
- Physics of Plasmas, Vol. 4, Issue 1
Size Scaling of Turbulent Transport in Magnetically Confined Plasmas
journal, April 2002
- Lin, Z.; Ethier, S.; Hahm, T. S.
- Physical Review Letters, Vol. 88, Issue 19
Nonlocal properties of gyrokinetic turbulence and the role of E×B flow shear
journal, July 2007
- Wang, W. X.; Hahm, T. S.; Lee, W. W.
- Physics of Plasmas, Vol. 14, Issue 7
Statistical Analysis of Anomalous Transport in Resistive Interchange Turbulence
journal, September 1992
- Sugama, Hideo; Wakatani, Masahiro
- Journal of the Physical Society of Japan, Vol. 61, Issue 9
Study of the interaction between diffusive and avalanche-like transport in near-critical dissipative-trapped-electron-mode turbulence
journal, October 2006
- Mier, J. A.; García, L.; Sánchez, R.
- Physics of Plasmas, Vol. 13, Issue 10
Nonlinear Self-Sustained Drift-Wave Turbulence
journal, December 1995
- Drake, J. F.; Zeiler, A.; Biskamp, D.
- Physical Review Letters, Vol. 75, Issue 23
Dynamics of turbulence spreading in magnetically confined plasmas
journal, March 2005
- Gürcan, Ö. D.; Diamond, P. H.; Hahm, T. S.
- Physics of Plasmas, Vol. 12, Issue 3
Discovery of stationary operation of quiescent H-mode plasmas with net-zero neutral beam injection torque and high energy confinement on DIII-D
journal, March 2016
- Burrell, K. H.; Barada, K.; Chen, X.
- Physics of Plasmas, Vol. 23, Issue 5
L-mode validation studies of gyrokinetic turbulence simulations via multiscale and multifield turbulence measurements on the DIII-D tokamak
journal, May 2011
- Rhodes, T. L.; Holland, C.; Smith, S. P.
- Nuclear Fusion, Vol. 51, Issue 6
Spreading of turbulence in plane Couette flow
journal, January 2016
- Couliou, M.; Monchaux, R.
- Physical Review E, Vol. 93, Issue 1
Mesoscopic Transport Events and the Breakdown of Fick’s Law for Turbulent Fluxes
journal, September 2018
- Hahm, T. S.; Diamond, P. H.
- Journal of the Korean Physical Society, Vol. 73, Issue 6
Turbulent Transport in Tokamak Plasmas with Rotational Shear
journal, April 2011
- Barnes, M.; Parra, F. I.; Highcock, E. G.
- Physical Review Letters, Vol. 106, Issue 17
Theory of self‐organized critical transport in tokamak plasmas
journal, April 1996
- Kishimoto, Y.; Tajima, T.; Horton, W.
- Physics of Plasmas, Vol. 3, Issue 4
Radially global gyrokinetic simulation studies of transport barriers
journal, May 1996
- Parker, S. E.; Mynick, H. E.; Artun, M.
- Physics of Plasmas, Vol. 3, Issue 5
A first-principles predictive model of the pedestal height and width: development, testing and ITER optimization with the EPED model
journal, August 2011
- Snyder, P. B.; Groebner, R. J.; Hughes, J. W.
- Nuclear Fusion, Vol. 51, Issue 10
Effect of the isotope mass on the turbulent transport at the edge of L-mode plasmas in ASDEX Upgrade and JET-ILW
journal, October 2019
- Bonanomi, N.; Angioni, C.; Crandall, P. C.
- Nuclear Fusion, Vol. 59, Issue 12
Subcritical turbulence spreading and avalanche birth
journal, March 2019
- Heinonen, R. A.; Diamond, P. H.
- Physics of Plasmas, Vol. 26, Issue 3
Turbulent transport reduction induced by transition on radial electric field shear and curvature through amplitude and cross-phase in torus plasma
journal, November 2017
- Kobayashi, T.; Itoh, K.; Ido, T.
- Scientific Reports, Vol. 7, Issue 1
How is turbulence intensity determined by macroscopic variables in a toroidal plasma?
journal, September 2013
- Inagaki, S.; Tokuzawa, T.; Tamura, N.
- Nuclear Fusion, Vol. 53, Issue 11
Hysteresis Relation between Turbulence and Temperature Modulation during the Heat Pulse Propagation into a Magnetic Island in DIII-D
journal, June 2018
- Ida, K.; Kobayashi, T.; Ono, M.
- Physical Review Letters, Vol. 120, Issue 24
Signatures of turbulence spreading during the H–L back-transition in TJ-II plasmas
journal, February 2011
- Estrada, T.; Hidalgo, C.; Happel, T.
- Nuclear Fusion, Vol. 51, Issue 3
Experimental Identification of Electric Field Excitation Mechanisms in a Structural Transition of Tokamak Plasmas
journal, August 2016
- Kobayashi, T.; Itoh, K.; Ido, T.
- Scientific Reports, Vol. 6, Issue 1
Transition to subcritical turbulence in a tokamak plasma
journal, December 2016
- van Wyk, F.; Highcock, E. G.; Schekochihin, A. A.
- Journal of Plasma Physics, Vol. 82, Issue 6
Investigation of the transport shortfall in Alcator C-Mod L-mode plasmas
journal, March 2013
- Howard, N. T.; White, A. E.; Greenwald, M.
- Physics of Plasmas, Vol. 20, Issue 3
Non-perturbative models of intermittency in drift-wave turbulence: towards a probabilistic theory of anomalous transport
journal, August 2003
- Kim, Eun-jin; Diamond, P. H.; Malkov, M.
- Nuclear Fusion, Vol. 43, Issue 9
Confinement and local transport in the National Spherical Torus Experiment (NSTX)
journal, June 2007
- Kaye, S. M.; Levinton, F. M.; Stutman, D.
- Nuclear Fusion, Vol. 47, Issue 7
Nonlinear instabilities driven by coherent phase-space structures
journal, March 2013
- Lesur, M.; Diamond, P. H.
- Physical Review E, Vol. 87, Issue 3
The mechanism of self‐sustainment in collisional drift wave turbulence
journal, August 1992
- Scott, Bruce D.
- Physics of Fluids B: Plasma Physics, Vol. 4, Issue 8
Turbulence spreading into the linearly stable zone and transport scaling
journal, April 2004
- Hahm, T. S.; Diamond, P. H.; Lin, Z.
- Plasma Physics and Controlled Fusion, Vol. 46, Issue 5A
Turbulence spreading in reversed shear plasmas
journal, April 2006
- Yagi, M.; Ueda, T.; Itoh, S-I
- Plasma Physics and Controlled Fusion, Vol. 48, Issue 5A
The wave of Advance of Advantageous Genes
journal, June 1937
- Fisher, R. A.
- Annals of Eugenics, Vol. 7, Issue 4
Turbulence spreading, anomalous transport, and pinch effect
journal, December 2005
- Naulin, V.; Nielsen, A. H.; Rasmussen, J. Juul
- Physics of Plasmas, Vol. 12, Issue 12
Heuristic theory of nonlocally broken gyro-Bohm scaling
journal, July 2005
- Waltz, R. E.; Candy, J.
- Physics of Plasmas, Vol. 12, Issue 7
Separation of transport in slow and fast time-scales using modulated heat pulse experiments (hysteresis in flux explained)
journal, September 2018
- van Berkel, M.; Vandersteen, G.; Zwart, H. J.
- Nuclear Fusion, Vol. 58, Issue 10
Suppression of shear damping in drift wave turbulence
journal, May 1985
- Biskamp, D.; Walter, M.
- Physics Letters A, Vol. 109, Issue 1-2
Self-sustained collisional drift-wave turbulence in a sheared magnetic field
journal, December 1990
- Scott, Bruce D.
- Physical Review Letters, Vol. 65, Issue 26
Effects of q-profile structure on turbulence spreading: A fluctuation intensity transport analysis
journal, September 2014
- Yi, S.; Kwon, J. M.; Diamond, P. H.
- Physics of Plasmas, Vol. 21, Issue 9
The structure and dynamics of electrostatic and magnetostatic drift holes
journal, September 1990
- Terry, P. W.; Diamond, P. H.; Hahm, T. S.
- Physics of Fluids B: Plasma Physics, Vol. 2, Issue 9
The transition to turbulence in parallel flows: A personal view
journal, March 2015
- Pomeau, Yves
- Comptes Rendus Mécanique, Vol. 343, Issue 3
A non-modal analytical method to predict turbulent properties applied to the Hasegawa-Wakatani model
journal, January 2015
- Friedman, B.; Carter, T. A.
- Physics of Plasmas, Vol. 22, Issue 1
Avalanches, hydrodynamics, and discharge events in models of sandpiles
journal, May 1992
- Hwa, Terence; Kardar, Mehran
- Physical Review A, Vol. 45, Issue 10
Front propagation and critical gradient transport models
journal, December 2007
- Garbet, X.; Sarazin, Y.; Imbeaux, F.
- Physics of Plasmas, Vol. 14, Issue 12
Implementation and application of two synthetic diagnostics for validating simulations of core tokamak turbulence
journal, May 2009
- Holland, C.; White, A. E.; McKee, G. R.
- Physics of Plasmas, Vol. 16, Issue 5