Full-f XGC1 gyrokinetic study of improved ion energy confinement from impurity stabilization of ITG turbulence

Kim, Kyuho; Kwon, Jae -Min; Chang, C. S.; Seo, Janghoon; Ku, S.; Choe, W.

doi:10.1063/1.4984991

Title: Full-f XGC1 gyrokinetic study of improved ion energy confinement from impurity stabilization of ITG turbulence

Journal Article · Wed Jun 07 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4984991· OSTI ID:1543835

Kim, Kyuho ^[1]; Kwon, Jae -Min ^[2];

^[3];

^[4]; Ku, S. ^[3]; Choe, W. ^[1]

Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (South Korea)
National Fusion Research Inst., Daejeon (South Korea)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (South Korea); Korea Inst. of Nuclear Nonproliferation and Control, Daejeon (South Korea)

Flux-driven full-f gyrokinetic simulations are performed to study carbon impurity effects on the ion temperature gradient (ITG) turbulence and ion thermal transport in a toroidal geometry. Employing the full-f gyrokinetic code XGC1, both main ions and impurities are evolved self-consistently including turbulence and neoclassical physics. It is found that the carbon impurity profile self-organizes to form an inwardly peaked density profile, which weakens the ITG instabilities and reduces the overall fluctuations and ion thermal transport. A stronger reduction appears in the low frequency components of the fluctuations. The global structure of E × B flow also changes, resulting in the reduction of global avalanche like transport events in the impure plasma. Here, the detailed properties of impurity transport are also studied, and it is revealed that both the inward neoclassical pinch and the outward turbulent transport are equally important in the formation of the steady state impurity profile.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Princeton Univ., NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231; AC02-09CH11466

OSTI ID:: 1543835

Alternate ID(s):: OSTI ID: 1366563

Journal Information:: Physics of Plasmas, Vol. 24, Issue 6; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 10 works

Citation information provided by
Web of Science

References (45)

Study of impurity transport in FTU ITB plasmas Carraro, L.; Gabellieri, L.; Mattioli, M. Plasma Physics and Controlled Fusion, Vol. 46, Issue 2 https://doi.org/10.1088/0741-3335/46/2/005	journal	December 2003
Multi-Mode transport modeling of the International Thermonuclear Experimental Reactor (ITER) Bateman, Glenn; Kritz, Arnold H.; Kinsey, Jon E. Physics of Plasmas, Vol. 5, Issue 6 https://doi.org/10.1063/1.872909	journal	June 1998
An Eulerian gyrokinetic-Maxwell solver Candy, J.; Waltz, R. E. Journal of Computational Physics, Vol. 186, Issue 2 https://doi.org/10.1016/S0021-9991(03)00079-2	journal	April 2003
Effects of tungsten radiation on the behaviour of PLT tokamak discharges Hinnov, E.; Bol, K.; Dimock, D. Nuclear Fusion, Vol. 18, Issue 9 https://doi.org/10.1088/0029-5515/18/9/010	journal	September 1978
Effect of finite aspect ratio on the neoclassical ion thermal conductivity in the banana regime Chang, C. S. Physics of Fluids, Vol. 25, Issue 9 https://doi.org/10.1063/1.863934	journal	January 1982
Molybdenum transport in high density FTU plasmas with strong radio frequency electron heating Leigheb, M.; Romanelli, M.; Gabellieri, L. Plasma Physics and Controlled Fusion, Vol. 49, Issue 11 https://doi.org/10.1088/0741-3335/49/11/010	journal	October 2007
Effect of N2, Ne and Ar seeding on Alcator C-Mod H-mode confinement Reinke, M. L.; Hughes, J. W.; Loarte, A. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2010.10.055	journal	August 2011
Influence of the heating profile on impurity transport in ASDEX Upgrade Dux, R.; Neu, R.; Peeters, A. G. Plasma Physics and Controlled Fusion, Vol. 45, Issue 9 https://doi.org/10.1088/0741-3335/45/9/317	journal	August 2003
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
Investigations of impurity seeding and radiation control for long-pulse and high-density H-mode plasmas in JT-60U Asakura, N.; Nakano, T.; Oyama, N. Nuclear Fusion, Vol. 49, Issue 11 https://doi.org/10.1088/0029-5515/49/11/115010	journal	September 2009
Gyrokinetic approach in particle simulation Lee, W. W. Physics of Fluids, Vol. 26, Issue 2 https://doi.org/10.1063/1.864140	journal	January 1983
Study of ion turbulent transport and profile formations using global gyrokinetic full- f Vlasov simulation Idomura, Y.; Urano, H.; Aiba, N. Nuclear Fusion, Vol. 49, Issue 6 https://doi.org/10.1088/0029-5515/49/6/065029	journal	May 2009
Compatibility of ITER scenarios with full tungsten wall in ASDEX Upgrade Gruber, O.; Sips, A. C. C.; Dux, R. Nuclear Fusion, Vol. 49, Issue 11 https://doi.org/10.1088/0029-5515/49/11/115014	journal	September 2009
Simulation of the time behaviour of impurities in JET Ar-seeded discharges and its relation with sawtoothing and RF heating Puiatti, M. E.; Valisa, M.; Mattioli, M. Plasma Physics and Controlled Fusion, Vol. 45, Issue 12 https://doi.org/10.1088/0741-3335/45/12/003	journal	October 2003
Core transport analysis of nitrogen seeded H-mode discharges in the ASDEX Upgrade Tardini, G.; Fischer, R.; Jenko, F. Plasma Physics and Controlled Fusion, Vol. 55, Issue 1 https://doi.org/10.1088/0741-3335/55/1/015010	journal	December 2012
A new hybrid-Lagrangian numerical scheme for gyrokinetic simulation of tokamak edge plasma Ku, S.; Hager, R.; Chang, C. S. Journal of Computational Physics, Vol. 315 https://doi.org/10.1016/j.jcp.2016.03.062	journal	June 2016
A new bdelta f method for neoclassical transport studies Wang, W. X.; Nakajima, N.; Okamoto, M. Plasma Physics and Controlled Fusion, Vol. 41, Issue 9 https://doi.org/10.1088/0741-3335/41/9/303	journal	August 1999
Gyrokinetic Fokker-Planck Collision Operator Li, B.; Ernst, D. R. Physical Review Letters, Vol. 106, Issue 19 https://doi.org/10.1103/PhysRevLett.106.195002	journal	May 2011
Results and modelling of high power edge radiation cooling in Textor Ongena, J.; Messiaen, A. M.; Tokar, M. Physica Scripta, Vol. 52, Issue 4 https://doi.org/10.1088/0031-8949/52/4/016	journal	October 1995
A fully non-linear multi-species Fokker–Planck–Landau collision operator for simulation of fusion plasma Hager, Robert; Yoon, E. S.; Ku, S. Journal of Computational Physics, Vol. 315 https://doi.org/10.1016/j.jcp.2016.03.064	journal	June 2016
Global and pedestal confinement in JET with a Be/W metallic wall Beurskens, M. N. A.; Frassinetti, L.; Challis, C. Nuclear Fusion, Vol. 54, Issue 4 https://doi.org/10.1088/0029-5515/54/4/043001	journal	March 2014
Effects of ECRH power and safety factor on laser blow-off injected impurity confinement in TCV Scavino, E.; Bakos, J.; Weisen, H. Plasma Physics and Controlled Fusion, Vol. 46, Issue 5 https://doi.org/10.1088/0741-3335/46/5/008	journal	April 2004
Roles of argon seeding in energy confinement and pedestal structure in JT-60U Urano, H.; Nakata, M.; Aiba, N. Nuclear Fusion, Vol. 55, Issue 3 https://doi.org/10.1088/0029-5515/55/3/033010	journal	February 2015
A design retrospective of the DIII-D tokamak Luxon, J. L. Nuclear Fusion, Vol. 42, Issue 5 https://doi.org/10.1088/0029-5515/42/5/313	journal	May 2002
Gyrokinetic simulation of ion temperature gradient driven turbulence in 3D toroidal geometry Parker, S. E.; Lee, W. W.; Santoro, R. A. Physical Review Letters, Vol. 71, Issue 13 https://doi.org/10.1103/PhysRevLett.71.2042	journal	September 1993
Monte Carlo evaluation of transport coefficients Boozer, Allen H. Physics of Fluids, Vol. 24, Issue 5 https://doi.org/10.1063/1.863445	journal	January 1981
The ITER design Aymar, R.; Barabaschi, P.; Shimomura, Y. Plasma Physics and Controlled Fusion, Vol. 44, Issue 5 https://doi.org/10.1088/0741-3335/44/5/304	journal	April 2002
Chapter 2: Plasma confinement and transport Transport, ITER Physics Expert Group on Confin; Database, ITER Physics Expert Group on Confin; Editors, ITER Physics Basis Nuclear Fusion, Vol. 39, Issue 12 https://doi.org/10.1088/0029-5515/39/12/302	journal	December 1999
Impurity effects on ion-drift-wave eigenmodes in a sheared magnetic field Tang, W. M.; White, R. B.; Guzdar, P. N. Physics of Fluids, Vol. 23, Issue 1 https://doi.org/10.1063/1.862835	journal	January 1980
Collisional effects on coherent structures of zonal flows and turbulent transport Itoh, K.; Hallatschek, K.; Toda, S. Plasma Physics and Controlled Fusion, Vol. 46, Issue 5A https://doi.org/10.1088/0741-3335/46/5A/037	journal	April 2004
Effect of impurity particles on the finite-aspect ratio neoclassical ion thermal conductivity in a tokamak Chang, C. S.; Hinton, F. L. Physics of Fluids, Vol. 29, Issue 10 https://doi.org/10.1063/1.865847	journal	January 1986
Numerical simulation of ion‐temperature‐gradient‐driven modes Xu, X. Q.; Rosenbluth, M. N. Physics of Fluids B: Plasma Physics, Vol. 3, Issue 3 https://doi.org/10.1063/1.859862	journal	March 1991
Drift Instability Due to Impurity Ions Coppi, B.; Furth, H. P.; Rosenbluth, M. N. Physical Review Letters, Vol. 17, Issue 7 https://doi.org/10.1103/PhysRevLett.17.377	journal	August 1966
Impurity effects on drift wave stability and impurity transport Dominguez, R. R.; Staebler, G. M. Nuclear Fusion, Vol. 33, Issue 1 https://doi.org/10.1088/0029-5515/33/1/I05	journal	January 1993
Metal impurity transport control in JET H-mode plasmas with central ion cyclotron radiofrequency power injection Valisa, M.; Carraro, L.; Predebon, I. Nuclear Fusion, Vol. 51, Issue 3 https://doi.org/10.1088/0029-5515/51/3/033002	journal	February 2011
Experimental Confirmation of Impurity Convection Driven by the Ion-Temperature Gradient in Toroidal Plasmas Wade, M. R.; Houlberg, W. A.; Baylor, L. R. Physical Review Letters, Vol. 84, Issue 2 https://doi.org/10.1103/PhysRevLett.84.282	journal	January 2000
Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices Burrell, K. H. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872367	journal	May 1997
Impurity effects on _i mode stability and transport Frojdh, M.; Liljestrom, M.; Nordman, H. Nuclear Fusion, Vol. 32, Issue 3 https://doi.org/10.1088/0029-5515/32/3/I06	journal	March 1992
Impurity-seeded ELMy H-modes in JET, with high density and reduced heat load Monier-Garbet, P.; Andrew, Ph; Belo, P. Nuclear Fusion, Vol. 45, Issue 11 https://doi.org/10.1088/0029-5515/45/11/022	journal	October 2005
Full-f gyrokinetic particle simulation of centrally heated global ITG turbulence from magnetic axis to edge pedestal top in a realistic tokamak geometry Ku, S.; Chang, C. S.; Diamond, P. H. Nuclear Fusion, Vol. 49, Issue 11 https://doi.org/10.1088/0029-5515/49/11/115021	journal	September 2009
Physics of intrinsic rotation in flux-driven ITG turbulence Ku, S.; Abiteboul, J.; Diamond, P. H. Nuclear Fusion, Vol. 52, Issue 6 https://doi.org/10.1088/0029-5515/52/6/063013	journal	April 2012
Suppression of Large Edge-Localized Modes in High-Confinement DIII-D Plasmas with a Stochastic Magnetic Boundary Evans, T. E.; Moyer, R. A.; Thomas, P. R. Physical Review Letters, Vol. 92, Issue 23 https://doi.org/10.1103/PhysRevLett.92.235003	journal	June 2004
Impact of carbon impurities on the confinement of high-ion-temperature discharges in the Large Helical Device Osakabe, M.; Takahashi, H.; Nagaoka, K. Plasma Physics and Controlled Fusion, Vol. 56, Issue 9 https://doi.org/10.1088/0741-3335/56/9/095011	journal	July 2014
Overview of ITER-FEAT - The future international burning plasma experiment Aymar, R.; Chuyanov, V. A.; Huguet, M. Nuclear Fusion, Vol. 41, Issue 10 https://doi.org/10.1088/0029-5515/41/10/301	journal	October 2001
Control of core argon impurity profile by ECH in KSTAR L-mode plasmas Hong, Joohwan; Hun Lee, Seung; Kim, Juhyung Nuclear Fusion, Vol. 55, Issue 6 https://doi.org/10.1088/0029-5515/55/6/063016	journal	May 2015

Cited By (3)

Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach Parker, Jeffrey B.; LoDestro, Lynda L.; Told, Daniel Nuclear Fusion, Vol. 58, Issue 5 https://doi.org/10.1088/1741-4326/aab5c8	journal	March 2018
The isotope effect on impurities and bulk ion particle transport in the Large Helical Device Ida, K.; Sakamoto, R.; Yoshinuma, M. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab0e41	journal	April 2019
Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach Parker, Jeffrey B.; LoDestro, Lynda L.; Told, Daniel arXiv https://doi.org/10.48550/arxiv.1803.10140	text	January 2018

Similar Records

Full-f gyrokinetic particle simulation of centrally heated global ITG turbulence from magnetic axis to edge pedestal top in a realistic tokamak geometry

Journal Article · Wed Sep 30 00:00:00 EDT 2009 · Nuclear Fusion · OSTI ID:1543835

Ku, S.; Chang, C. S.; Diamond, P. H.

Partnership for Edge Physics Simulation

Technical Report · Mon Jul 31 00:00:00 EDT 2017 · OSTI ID:1543835

Kritz, Arnold H.; Rafiq, Tariq

Physics of intrinsic rotation in flux-driven ITG turbulence

Journal Article · Fri Apr 27 00:00:00 EDT 2012 · Nuclear Fusion · OSTI ID:1543835

Ku, S.; Abiteboul, J.; Diamond, P. H.; +13 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Physics

Title: Full-f XGC1 gyrokinetic study of improved ion energy confinement from impurity stabilization of ITG turbulence

Citation Formats

References (45)

Cited By (3)

Similar Records

Related Subjects