Role of fast ions in spontaneous neoclassical tearing mode instabilities in NSTX

Yang, James; Podesta, Mario; Fredrickson, Eric; Liu, Chang; Berkery, John W; Poli, Francesca M

doi:10.1088/1361-6587/acd07f

Title: Role of fast ions in spontaneous neoclassical tearing mode instabilities in NSTX

Journal Article · Mon May 15 00:00:00 EDT 2023 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/acd07f· OSTI ID:1974415

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Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Spontaneous neoclassical tearing modes (spontaneous NTMs) have been observed in the National Spherical Torus Experiment (NSTX). Recently, a TRANSP based model for the modified Rutherford equation analysis was developed to accurately predict the effect of fast ions on the growth of magnetic islands. The goal of this paper is to utilize the TRANSP NTM model to understand the role of fast ions in NSTX spontaneous NTMs. Our analysis shows that when the passing fast ion driven kinetic neoclassical polarization current term is larger than 1% of the bootstrap current term in the modified Rutherford equation, fast ions play a decisive role in the early growth phase of spontaneous NTM. This result is applicable to any tokamak plasmas with a fast ion drift orbit width, or the fast ion poloidal Larmor radius, comparable to the magnetic island width.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1974415

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 65; Conference: 26. Workshop on MHD Stability Control, Spokane, WA (United States), 14-15 Oct 2022; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (32)

Kinetic equilibrium reconstruction and the impact on stability analysis of KSTAR plasmas Jiang, Y.; Sabbagh, S. A.; Park, Y. S. Nuclear Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1741-4326/ac26a4	journal	October 2021
Nonlinear growth of magnetic islands by passing fast ions in NSTX Yang, J.; Fredrickson, E. D.; Podestà, M. Plasma Physics and Controlled Fusion, Vol. 64, Issue 9 https://doi.org/10.1088/1361-6587/ac7970	journal	July 2022
Synergy of coupled kink and tearing modes in fast ion transport Yang, J.; Podestà, M.; Fredrickson, E. D. Plasma Physics and Controlled Fusion, Vol. 63, Issue 4 https://doi.org/10.1088/1361-6587/abd9e4	journal	February 2021
Helical temperature perturbations associated with tearing modes in tokamak plasmas Fitzpatrick, Richard Physics of Plasmas, Vol. 2, Issue 3 https://doi.org/10.1063/1.871434	journal	March 1995
Numerical modeling of linear drift-tearing mode stability Yu, Q.; Günter, S.; Scott, B. D. Physics of Plasmas, Vol. 10, Issue 3 https://doi.org/10.1063/1.1554739	journal	March 2003
A reduced fast ion transport model for the tokamak transport code TRANSP Podestà, M.; Gorelenkova, M.; White, R. B. Plasma Physics and Controlled Fusion, Vol. 56, Issue 5 https://doi.org/10.1088/0741-3335/56/5/055003	journal	April 2014
Integrated impurity diagnostic package for magnetic fusion experiments Stutman, D.; Finkenthal, M.; Moos, H. W. Review of Scientific Instruments, Vol. 74, Issue 3 https://doi.org/10.1063/1.1538327	journal	March 2003
Hamiltonian guiding center drift orbit calculation for plasmas of arbitrary cross section White, R. B.; Chance, M. S. Physics of Fluids, Vol. 27, Issue 10 https://doi.org/10.1063/1.864527	journal	January 1984
Influence of energetic ions on neoclassical tearing modes Cai, Huishan Nuclear Fusion, Vol. 56, Issue 12 https://doi.org/10.1088/0029-5515/56/12/126016	journal	September 2016
Influence of Energetic Ions on Tearing Modes Cai, Huishan; Wang, Shaojie; Xu, Yinfeng Physical Review Letters, Vol. 106, Issue 7 https://doi.org/10.1103/PhysRevLett.106.075002	journal	February 2011
Nonlinear evolution of double tearing modes in tokamaks Fredrickson, E.; Bell, M.; Budny, R. V. Physics of Plasmas, Vol. 7, Issue 10 https://doi.org/10.1063/1.1289893	journal	January 2000
Seed island of neoclassical tearing modes at ASDEX Upgrade Gude, A.; Günter, S.; Sesnic, S. Nuclear Fusion, Vol. 39, Issue 1 https://doi.org/10.1088/0029-5515/39/1/308	journal	January 1999
Hybrid simulation of energetic particles interacting with magnetohydrodynamics using a slow manifold algorithm and GPU acceleration Liu, Chang; Jardin, Stephen C.; Qin, Hong Computer Physics Communications, Vol. 275 https://doi.org/10.1016/j.cpc.2022.108313	journal	June 2022
Observation of spontaneous neoclassical tearing modes Fredrickson, E. D. Physics of Plasmas, Vol. 9, Issue 2 https://doi.org/10.1063/1.1435003	journal	February 2002
Aspect ratio effects on neoclassical tearing modes from comparison between DIII-D and National Spherical Torus Experiment La Haye, R. J.; Buttery, R. J.; Gerhardt, S. P. Physics of Plasmas, Vol. 19, Issue 6 https://doi.org/10.1063/1.4729658	journal	June 2012
Computation of resistive instabilities by matched asymptotic expansions Glasser, A. H.; Wang, Z. R.; Park, J. -K. Physics of Plasmas, Vol. 23, Issue 11 https://doi.org/10.1063/1.4967862	journal	November 2016
Finite Larmor-Radius Theory of Magnetic Island Evolution Waelbroeck, F. L.; Connor, J. W.; Wilson, H. R. Physical Review Letters, Vol. 87, Issue 21 https://doi.org/10.1103/PhysRevLett.87.215003	journal	November 2001
Neoclassical Tearing Mode Seeding by Nonlinear Three-Wave Interactions in Tokamaks Bardóczi, L.; Logan, N. C.; Strait, E. J. Physical Review Letters, Vol. 127, Issue 5 https://doi.org/10.1103/PhysRevLett.127.055002	journal	July 2021
Rotating nonlinear magnetic islands in a tokamak plasma Smolyakov, A. I.; Hirose, A.; Lazzaro, E. Physics of Plasmas, Vol. 2, Issue 5 https://doi.org/10.1063/1.871308	journal	May 1995
Relationship between onset thresholds, trigger types and rotation shear for the m / n = 2/1 neoclassical tearing mode in a high-β spherical torus Gerhardt, S. P.; Brennan, D. P.; Buttery, R. Nuclear Fusion, Vol. 49, Issue 3 https://doi.org/10.1088/0029-5515/49/3/032003	journal	March 2009
Thomson scattering density calibration by Rayleigh and rotational Raman scattering on NSTX LeBlanc, B. P. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2956747	journal	October 2008
Comparison of poloidal velocity measurements to neoclassical theory on the National Spherical Torus Experiment Bell, R. E.; Andre, R.; Kaye, S. M. Physics of Plasmas, Vol. 17, Issue 8 https://doi.org/10.1063/1.3478571	journal	August 2010
Observation of Nonlinear Neoclassical Pressure-Gradient–Driven Tearing Modes in TFTR Chang, Z.; Callen, J. D.; Fredrickson, E. D. Physical Review Letters, Vol. 74, Issue 23 https://doi.org/10.1103/PhysRevLett.74.4663	journal	June 1995
Observation of Instability-Induced Current Redistribution in a Spherical-Torus Plasma Menard, J. E.; Bell, R. E.; Gates, D. A. Physical Review Letters, Vol. 97, Issue 9 https://doi.org/10.1103/PhysRevLett.97.095002	journal	August 2006
Exploration of spherical torus physics in the NSTX device Ono, M.; Kaye, S. M.; Peng, Y. -K. M. Nuclear Fusion, Vol. 40, Issue 3Y https://doi.org/10.1088/0029-5515/40/3Y/316	journal	March 2000
Transport effects of low (m,n) MHD modes on TFTR supershots Chang, Z.; Fredrickson, E. D.; Callen, J. D. Nuclear Fusion, Vol. 34, Issue 10 https://doi.org/10.1088/0029-5515/34/10/I03	journal	October 1994
The motional Stark effect diagnostic on NSTX Levinton, F. M.; Yuh, H. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2968699	journal	October 2008
The physics of neoclassical tearing modes and their stabilization by ECCD in ASDEX Upgrade Zohm, H.; Gantenbein, G.; Gude, A. Nuclear Fusion, Vol. 41, Issue 2 https://doi.org/10.1088/0029-5515/41/2/306	journal	February 2001
A model of energetic ion effects on pressure driven tearing modes in tokamaks Halfmoon, M. R.; Brennan, D. P. Physics of Plasmas, Vol. 24, Issue 6 https://doi.org/10.1063/1.4984772	journal	June 2017
Thermal ion kinetic effects and Landau damping in fishbone modes Liu, Chang; Jardin, Stephen C.; Bao, Jian Journal of Plasma Physics, Vol. 88, Issue 6 https://doi.org/10.1017/S0022377822000952	journal	November 2022
Island bootstrap current modification of the nonlinear dynamics of the tearing mode Carrera, R.; Hazeltine, R. D.; Kotschenreuther, M. Physics of Fluids, Vol. 29, Issue 4 https://doi.org/10.1063/1.865682	journal	January 1986
From Current-Driven to Neoclassically Driven Tearing Modes Reimerdes, H.; Sauter, O.; Goodman, T. Physical Review Letters, Vol. 88, Issue 10 https://doi.org/10.1103/PhysRevLett.88.105005	journal	February 2002

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