Gyrokinetic simulations of core turbulence and thermal transport in the high-βP discharge on EAST

Hu, Y. C.; Ye, L.; Gong, X. Z.; Garofalo, A. M.; Qian, J. P.; Huang, J.; Zhang, B.; Zhao, P. F.; Hu, Y. J.; Ren, Q. L.; Zhang, J. Y.; Zhang, X. X.; Liang, R. R.; Wang, Z. H.

doi:10.1088/1361-6587/acc482

Gyrokinetic simulations of core turbulence and thermal transport in the high-β_P discharge on EAST

Journal Article · Tue Apr 11 00:00:00 EDT 2023 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/acc482· OSTI ID:2290327

^[1]; ^[2]; Gong, X. Z. ^[2]; ^[3]; Qian, J. P. ^[2]; Huang, J. ^[2]; ^[2]; Zhao, P. F. ^[4]; ^[2]; Ren, Q. L. ^[2]; Zhang, J. Y. ^[4]; ^[4]; Liang, R. R. ^[4]; Wang, Z. H. ^[4]

Chinese Academy of Sciences, Hefei (China); University of Science and Technology of China, Hefei (China); General Atomics
Chinese Academy of Sciences, Hefei (China)
General Atomics, San Diego, CA (United States)
Chinese Academy of Sciences, Hefei (China); University of Science and Technology of China, Hefei (China)

The properties of core turbulence and thermal transport are investigated for EAST high-β_P (β_P ~ 3.1) plasmas with dominant electron heating (Te/Ti > 1) via gyrokinetic simulation with the NLT code. Linear simulations identify that the electrostatic η_e-driven trapped electron mode (η_e-TEM) dominates in the core region (ρ< 0.7) and the ion temperature gradient (ITG) mode dominates in the out region (ρ≥ 0.7), consistent with the linear threshold analysis of micro-instabilities. Sensitivity analysis shows that the normalized electron density gradient (R/L_ne) and ITG (R/L_Ti) are two effective parameters to stabilize TEM instability. Nonlinear simulations are also carried out and compared with the experimental results, which show that the electron thermal internal transport barrier (ITB) in EAST high-β_P plasma is determined by the TEM-induced turbulence. A higher zonal flow shearing rate is observed in the ITB region (0.2 < ρ < 0.34), which can regulate energy transport induced by TEM turbulence and facilitate the formation of e-ITB. A plausible positive feedback mechanism to mitigate turbulence transport and improve energy confinement via enhanced ion heating is proposed for future experiments.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FC02-04ER54698; SC0010685

OSTI ID:: 2290327

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 5 Vol. 65; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (40)

Re-splitting δf method for electro-magnetic gyrokinetic particle-in-cell (PIC) simulation of tokamak plasmas Ye, Lei; Chen, Yang Computer Physics Communications, Vol. 250 https://doi.org/10.1016/j.cpc.2019.107050	journal	May 2020
Time diffusion method for gyrokinetic simulation of electrostatic turbulence with kinetic electrons Zhao, PengFei; Ye, Lei; Xiang, Nong Computer Physics Communications, Vol. 269 https://doi.org/10.1016/j.cpc.2021.108114	journal	December 2021
A gyrokinetic continuum code based on the numerical Lie transform (NLT) method Ye, Lei; Xu, Yingfeng; Xiao, Xiaotao Journal of Computational Physics, Vol. 316 https://doi.org/10.1016/j.jcp.2016.03.068	journal	July 2016
Electromagnetic gyrokinetic simulation of turbulence in torus plasmas Ishizawa, A.; Maeyama, S.; Watanabe, T. -H. Journal of Plasma Physics, Vol. 81, Issue 2 https://doi.org/10.1017/S0022377815000100	journal	February 2015
Linear gyrokinetic stability calculations of electron heat dominated plasmas in ASDEX Upgrade Peeters, A. G.; Angioni, C.; Apostoliceanu, M. Physics of Plasmas, Vol. 12, Issue 2 https://doi.org/10.1063/1.1848111	journal	February 2005
Fully electromagnetic gyrokinetic eigenmode analysis of high-beta shaped plasmas Belli, E. A.; Candy, J. Physics of Plasmas, Vol. 17, Issue 11 https://doi.org/10.1063/1.3495976	journal	November 2010
Transport formulation of the gyrokinetic turbulence Wang, Shaojie Physics of Plasmas, Vol. 19, Issue 6 https://doi.org/10.1063/1.4729660	journal	June 2012
Nonlinear scattering term in the gyrokinetic Vlasov equation Wang, Shaojie Physics of Plasmas, Vol. 20, Issue 8 https://doi.org/10.1063/1.4818593	journal	August 2013
Electromagnetic particle in cell modeling of the plasma focus: Current sheath formation and lift off Seng, Y. S.; Lee, P.; Rawat, R. S. Physics of Plasmas, Vol. 21, Issue 2 https://doi.org/10.1063/1.4866603	journal	February 2014
Application of visible bremsstrahlung to Z _eff measurement on the Experimental Advanced Superconducting Tokamak Chen, Yingjie; Wu, Zhenwei; Gao, Wei Review of Scientific Instruments, Vol. 86, Issue 2 https://doi.org/10.1063/1.4908200	journal	February 2015
Initial measurements of plasma current and electron density profiles using a polarimeter/interferometer (POINT) for long pulse operation in EAST (invited) Liu, H. Q.; Qian, J. P.; Jie, Y. X. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4963378	journal	October 2016
Confinement improvement in the high poloidal beta regime on DIII-D and application to steady-state H-mode on EAST Ding, S.; Garofalo, A. M.; Qian, J. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4982058	journal	May 2017
Linear interaction and relative role of the ion temperature gradient and trapped electron modes in the reactor-relevant finite beta plasma condition Kim, J. Y.; Han, H. S. Physics of Plasmas, Vol. 24, Issue 7 https://doi.org/10.1063/1.4990071	journal	July 2017
Transport barriers in bootstrap-driven tokamaks Staebler, G. M.; Garofalo, A. M.; Pan, C. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5019282	journal	May 2018
Destabilization of the trapped-electron mode by magnetic curvature drift resonances Adam, J. C.; Tang, W. M.; Rutherford, P. H. Physics of Fluids, Vol. 19, Issue 4 https://doi.org/10.1063/1.861489	journal	January 1976
Toroidal gyro‐Landau fluid model turbulence simulations in a nonlinear ballooning mode representation with radial modes Waltz, R. E.; Kerbel, G. D.; Milovich, J. Physics of Plasmas, Vol. 1, Issue 7 https://doi.org/10.1063/1.870934	journal	July 1994
Quantitative predictions of tokamak energy confinement from first‐principles simulations with kinetic effects Kotschenreuther, M.; Dorland, W.; Beer, M. A. Physics of Plasmas, Vol. 2, Issue 6 https://doi.org/10.1063/1.871261	journal	June 1995
Theory and simulation of rotational shear stabilization of turbulence Waltz, R. E.; Dewar, R. L.; Garbet, X. Physics of Plasmas, Vol. 5, Issue 5 https://doi.org/10.1063/1.872847	journal	May 1998
Advances in physics understanding of high poloidal beta regime toward steady-state operation of CFETR Qian, J. P.; Garofalo, A. M.; Gong, X. Z. Physics of Plasmas, Vol. 28, Issue 4 https://doi.org/10.1063/5.0032490	journal	April 2021
A full relativistic model of electron cyclotron current drive efficiency in tokamak plasmas Hu, Y. M.; Hu, Y. J.; Chen, J. L. Physics of Plasmas, Vol. 28, Issue 11 https://doi.org/10.1063/5.0066576	journal	November 2021
Theory of the ubiquitous mode Coppi, B.; Pegoraro, F. Nuclear Fusion, Vol. 17, Issue 5 https://doi.org/10.1088/0029-5515/17/5/009	journal	October 1977
Diffusive particle and heat pinch effects in toroidal plasmas Weiland, J.; Jarmén, A. B.; Nordman, H. Nuclear Fusion, Vol. 29, Issue 10 https://doi.org/10.1088/0029-5515/29/10/015	journal	October 1989
Equilibrium analysis of current profiles in tokamaks Lao, L. L.; Ferron, J. R.; Groebner, R. J. Nuclear Fusion, Vol. 30, Issue 6 https://doi.org/10.1088/0029-5515/30/6/006	journal	June 1990
Predictive tests of ITG based models of tokamak heat transport on ITER database discharges Erba, M.; Horton, W.; Ottaviani, M. Nuclear Fusion, Vol. 39, Issue 4 https://doi.org/10.1088/0029-5515/39/4/307	journal	April 1999
A New Path to Improve High β _p Plasma Performance on EAST for Steady-State Tokamak Fusion Reactor* Wan, Baonian Chinese Physics Letters, Vol. 37, Issue 4 https://doi.org/10.1088/0256-307X/37/4/045202	journal	April 2020
Improved tokamak concepts for JET and the future Thomas, P. R. Plasma Physics and Controlled Fusion, Vol. 36, Issue 12B https://doi.org/10.1088/0741-3335/36/12B/025	journal	December 1994
Investigation of energy transport in DIII-D High- β _P EAST-demonstration discharges with the TGLF turbulent and NEO neoclassical transport models Pan, C.; Staebler, G. M.; Lao, L. L. Nuclear Fusion, Vol. 57, Issue 3 https://doi.org/10.1088/1741-4326/aa4ff8	journal	January 2017
Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state Qian, J. P.; Garofalo, A. M.; Gong, X. Z. Nuclear Fusion, Vol. 57, Issue 5 https://doi.org/10.1088/1741-4326/aa626a	journal	March 2017
Transport modelling of JT-60U and JET plasmas with internal transport barriers towards prediction of JT-60SA high-beta steady-state scenario Hayashi, N.; Garcia, J.; Honda, M. Nuclear Fusion, Vol. 57, Issue 12 https://doi.org/10.1088/1741-4326/aa88de	journal	October 2017
Theory of transport in high bootstrap fraction H-modes with internal transport barriers Staebler, Gary M. Nuclear Fusion, Vol. 58, Issue 11 https://doi.org/10.1088/1741-4326/aac4b7	journal	September 2018
Integrated operation of steady-state long-pulse H-mode in Experimental Advanced Superconducting Tokamak Gong, X.; Garofalo, A. M.; Huang, J. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab1c7b	journal	July 2019
Modeling and advances in the high bootstrap fraction regime on EAST towards the steady-state operation Wu, M. Q.; Li, G. Q.; Qian, J. P. Nuclear Fusion, Vol. 59, Issue 10 https://doi.org/10.1088/1741-4326/ab2d60	journal	August 2019
Shafranov shift bifurcation of turbulent transport in the high β _p scenario on DIII-D McClenaghan, J.; Garofalo, A. M.; Staebler, G. M. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab4086	journal	September 2019
On the very high energy confinement observed in super H-mode DIII-D experiments Ding, S.; Garofalo, A. M.; Knolker, M. Nuclear Fusion, Vol. 60, Issue 3 https://doi.org/10.1088/1741-4326/ab66db	journal	January 2020
Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario Mazzi, S.; Zarzoso, D.; Garcia, J. Nuclear Fusion, Vol. 60, Issue 4 https://doi.org/10.1088/1741-4326/ab74a1	journal	March 2020
An experimental characterization of core turbulence regimes in Wendelstein 7-X Carralero, D.; Estrada, T.; Maragkoudakis, E. Nuclear Fusion, Vol. 61, Issue 9 https://doi.org/10.1088/1741-4326/ac112f	journal	August 2021
Ion temperature clamping in Wendelstein 7-X electron cyclotron heated plasmas Beurskens, M. N. A.; Bozhenkov, S. A.; Ford, O. Nuclear Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1741-4326/ac1653	journal	October 2021
EAST steady-state long pulse H-mode with core-edge integration for CFETR Gong, X. Z.; Garofalo, A. M.; Huang, J. Nuclear Fusion, Vol. 62, Issue 7 https://doi.org/10.1088/1741-4326/ac49ad	journal	April 2022
Role of Microtearing Turbulence in DIII-D High Bootstrap Current Fraction Plasmas Jian, X.; Holland, C.; Candy, J. Physical Review Letters, Vol. 123, Issue 22 https://doi.org/10.1103/PhysRevLett.123.225002	journal	November 2019
Fusion Plasma Performance and Confinement Studies on JT-60 and JT-60U Kamada, Y.; Fujita, T.; Ishida, S. Fusion Science and Technology, Vol. 42, Issue 2-3 https://doi.org/10.13182/FST02-A227	journal	November 2002

Similar Records

Reduced electron thermal transport in low collisionality H-mode plasmas in DIII-D and the importance of TEM/ETG-scale turbulence

Journal Article · Wed Jan 11 23:00:00 EST 2012 · Nuclear Fusion · OSTI ID:1564873

The dominant micro-turbulence instabilities in the lower q₉₅ high β_p plasmas on DIII-D and predict-first extrapolation

Journal Article · Wed Nov 13 19:00:00 EST 2019 · Nuclear Fusion · OSTI ID:1578050

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
gyrokinetic simulation
high poloidal beta
trapped electron mode
turbulence transport

Gyrokinetic simulations of core turbulence and thermal transport in the high-βP discharge on EAST

Citation Formats

References (40)

Similar Records

Related Subjects

Gyrokinetic simulations of core turbulence and thermal transport in the high-β_P discharge on EAST