Kinetic equilibrium reconstruction and the impact on stability analysis of KSTAR plasmas

Jiang, Y.; Sabbagh, S. A.; Park, Y. S.; Berkery, J. W.; Ahn, J. H.; Riquezes, J. D.; Bak, J. G.; Ko, W. H.; Ko, J.; Lee, J. H.; Yoon, S. W.; Glasser, A. H.; Wang, Z. R.

doi:10.1088/1741-4326/ac26a4

Kinetic equilibrium reconstruction and the impact on stability analysis of KSTAR plasmas

Journal Article · Wed Oct 06 00:00:00 EDT 2021 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ac26a4· OSTI ID:1867818

^[1]; Sabbagh, S. A. ^[2]; Park, Y. S. ^[2]; Berkery, J. W. ^[2]; Ahn, J. H. ^[2]; Riquezes, J. D. ^[2]; Bak, J. G. ^[3]; Ko, W. H. ^[3]; ^[3]; Lee, J. H. ^[3]; Yoon, S. W. ^[3]; Glasser, A. H. ^[4]; ^[5]

Columbia Univ., New York, NY (United States); Fusion Theory & Computation, Inc.
Columbia Univ., New York, NY (United States)
Korea Institute of Fusion Energy, Daejeon (Korea, Republic Of)
Fusion Theory and Computation, Inc., Kingston, WA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

High fidelity kinetic plasma equilibrium reconstructions are an essential requirement for accurate stability and disruption prediction analyses to support continuous operation of high beta tokamak plasmas. The present kinetic equilibrium reconstructions of plasmas in the KSTAR device include plasma density and temperature profiles from Thomson scattering and ion temperature from charge exchange spectroscopy diagnostics, and allowance for fast particle pressure. In addition, up to 25 channels of motional Stark effect diagnostic data are used to constrain the magnetic field pitch angle profile in the plasma to produce a reliable computation of the safety factor, q, profile. In this work, H-mode plasmas exhibit clear pedestal characteristics in the reconstructed pressure profile compared to internal transport barrier or L-mode plasmas. The plasma configuration and vertical position of inner strike points are validated by CCD and infrared camera images. Ideal and resistive magnetohydrodynamic (MHD) stability analyses using the DCON and resistive DCON codes utilize these kinetic equilibrium reconstructions to compare to experimental plasma stability. Equilibria with sufficiently low convergence error can provide reliable computation of ideal and resistive MHD stability analysis.

View Accepted Manuscript (DOE)

Research Organization:: Fusion Theory & Computation, Inc., Kingston, WA (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: Ministry of Science and ICT; Ministry of Science, ICT and Future Planning (MSIP) of Korea; USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0016201; SC0016614

OSTI ID:: 1867818

Alternate ID(s):: OSTI ID: 1887989

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 11 Vol. 61; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (37)

Computation of the Magnetohydrodynamic Spectrum in Axisymmetric Toroidal Confinement Systems Grimm, Ray C.; Greene, JOhn M.; Johnson, John L. Methods in Computational Physics: Advances in Research and Applications https://doi.org/10.1016/b978-0-12-460816-0.50012-9	book	January 1976
Wall conditioning of the KSTAR vacuum vessel Kim, K. M.; Yang, H. L.; Hong, S. H. Fusion Engineering and Design, Vol. 84, Issue 2-6 https://doi.org/10.1016/j.fusengdes.2009.03.002	journal	June 2009
Diagnostic development for current density profile control at KSTAR Ko, J.; Chung, J.; Messmer, M. C. C. Fusion Engineering and Design, Vol. 109-111 https://doi.org/10.1016/j.fusengdes.2016.02.008	journal	November 2016
Observation of ELM structures in MAST and AUG using a fast camera Koch, B.; Herrmann, A.; Kirk, A. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.139	journal	June 2007
Thermographic studies of outer target heat fluxes on KSTAR Lee, H. H.; Pitts, R. A.; Kang, C. S. Nuclear Materials and Energy, Vol. 12 https://doi.org/10.1016/j.nme.2016.12.019	journal	August 2017
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
Application of the low-frequency energy principle to wall modes Hu, Bo; Betti, R.; Manickam, J. Physics of Plasmas, Vol. 12, Issue 5 https://doi.org/10.1063/1.1873852	journal	May 2005
Development of KSTAR Thomson scattering system Lee, J. H.; Oh, S. T.; Wi, H. M. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3494275	journal	October 2010
The effect of an anisotropic pressure of thermal particles on resistive wall mode stability Berkery, J. W.; Betti, R.; Sabbagh, S. A. Physics of Plasmas, Vol. 21, Issue 11 https://doi.org/10.1063/1.4901568	journal	November 2014
The direct criterion of Newcomb for the ideal MHD stability of an axisymmetric toroidal plasma Glasser, A. H. Physics of Plasmas, Vol. 23, Issue 7 https://doi.org/10.1063/1.4958328	journal	July 2016
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
A reduced resistive wall mode kinetic stability model for disruption forecasting Berkery, J. W.; Sabbagh, S. A.; Bell, R. E. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4977464	journal	May 2017
Application of motional Stark effect in situ background correction to a superconducting tokamak Ko, Jinseok; Scott, Steve; Levinton, Fred Review of Scientific Instruments, Vol. 92, Issue 3 https://doi.org/10.1063/5.0040823	journal	March 2021
Reconstruction of current profile parameters and plasma shapes in tokamaks Lao, L. L.; St. John, H.; Stambaugh, R. D. Nuclear Fusion, Vol. 25, Issue 11 https://doi.org/10.1088/0029-5515/25/11/007	journal	November 1985
Ideal MHD stability properties of pressure driven modes in low shear tokamaks Manickam, J.; Pomphrey, N.; Todd, A. M. M. Nuclear Fusion, Vol. 27, Issue 9 https://doi.org/10.1088/0029-5515/27/9/009	journal	September 1987
Effect of plasma radial electric field on motional Stark effect measurements and equilibrium reconstruction Rice, B. W.; Burrell, K. H.; Lao, L. L. Nuclear Fusion, Vol. 37, Issue 4 https://doi.org/10.1088/0029-5515/37/4/i09	journal	April 1997
The KSTAR project: An advanced steady state superconducting tokamak experiment Lee, G. S.; Kim, J.; Hwang, S. M. Nuclear Fusion, Vol. 40, Issue 3Y https://doi.org/10.1088/0029-5515/40/3Y/319	journal	March 2000
Equilibrium properties of spherical torus plasmas in NSTX Sabbagh, S. A.; Kaye, S. M.; Menard, J. Nuclear Fusion, Vol. 41, Issue 11 https://doi.org/10.1088/0029-5515/41/11/309	journal	November 2001
The resistive wall mode and feedback control physics design in NSTX Sabbagh, S. A.; Bialek, J. M.; Bell, R. E. Nuclear Fusion, Vol. 44, Issue 4 https://doi.org/10.1088/0029-5515/44/4/011	journal	March 2004
Disruption scenarios, their mitigation and operation window in ITER Sugihara, M.; Shimada, M.; Fujieda, H. Nuclear Fusion, Vol. 47, Issue 4 https://doi.org/10.1088/0029-5515/47/4/012	journal	March 2007
Equilibrium and global MHD stability study of KSTAR high beta plasmas under passive and active mode control Katsuro-Hopkins, O.; Sabbagh, S. A.; Bialek, J. M. Nuclear Fusion, Vol. 50, Issue 2 https://doi.org/10.1088/0029-5515/50/2/025019	journal	January 2010
KSTAR equilibrium operating space and projected stabilization at high normalized beta Park, Y. S.; Sabbagh, S. A.; Berkery, J. W. Nuclear Fusion, Vol. 51, Issue 5 https://doi.org/10.1088/0029-5515/51/5/053001	journal	April 2011
Investigation of MHD instabilities and control in KSTAR preparing for high beta operation Park, Y. S.; Sabbagh, S. A.; Bialek, J. M. Nuclear Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0029-5515/53/8/083029	journal	July 2013
Equilibrium Reconstruction in EAST Tokamak Jinping, Qian; Baonian, Wan; Lao, L. L. Plasma Science and Technology, Vol. 11, Issue 2 https://doi.org/10.1088/1009-0630/11/2/03	journal	April 2009
Kinetic equilibrium reconstructions of plasmas in the MAST database and preparation for reconstruction of the first plasmas in MAST upgrade Berkery, J. W.; Sabbagh, S. A.; Kogan, L. Plasma Physics and Controlled Fusion, Vol. 63, Issue 5 https://doi.org/10.1088/1361-6587/abf230	journal	April 2021
Formation of the internal transport barrier in KSTAR Chung, J.; Kim, H. S.; Jeon, Y. M. Nuclear Fusion, Vol. 58, Issue 1 https://doi.org/10.1088/1741-4326/aa90c1	journal	November 2017
Equilibrium reconstruction at JET using Stokes model for polarimetry Faugeras, Blaise; Orsitto, Francesco Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad751	journal	August 2018
Real-time capable modeling of neutral beam injection on NSTX-U using neural networks Boyer, M. D.; Kaye, S.; Erickson, K. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab0762	journal	March 2019
Analysis of MHD stability and active mode control on KSTAR for high confinement, disruption-free plasma Park, Y. S.; Sabbagh, S. A.; Ahn, J. H. Nuclear Fusion, Vol. 60, Issue 5 https://doi.org/10.1088/1741-4326/ab79ca	journal	April 2020
Model predictive control of KSTAR equilibrium parameters enabled by TRANSP Boyer, M. D.; Yuan, X.; Ahn, J. Nuclear Fusion, Vol. 60, Issue 9 https://doi.org/10.1088/1741-4326/ab9c4a	journal	August 2020
Reassessment of steady-state operation in ITER with NBI and EC heating and current drive Polevoi, A. R.; Ivanov, A. A.; Medvedev, S. Yu. Nuclear Fusion, Vol. 60, Issue 9 https://doi.org/10.1088/1741-4326/aba335	journal	August 2020
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
Internal transport barrier on q =3 surface and poloidal plasma spin up in JT-60U high- β p discharges Koide, Y.; Kikuchi, M.; Mori, M. Physical Review Letters, Vol. 72, Issue 23 https://doi.org/10.1103/physrevlett.72.3662	journal	June 1994
Direct Measurement of the Radial Electric Field in Tokamak Plasmas using the Stark Effect Rice, B. W.; Burrell, K. H.; Lao, L. L. Physical Review Letters, Vol. 79, Issue 14 https://doi.org/10.1103/physrevlett.79.2694	journal	October 1997
Validation of Neoclassical Bootstrap Current Models in the Edge of an H -Mode Plasma Wade, M. R.; Murakami, M.; Politzer, P. A. Physical Review Letters, Vol. 92, Issue 23 https://doi.org/10.1103/physrevlett.92.235005	journal	June 2004
KSTAR Charge Exchange Spectroscopy System No authors listed IEEE Transactions on Plasma Science, Vol. 38, Issue 4 https://doi.org/10.1109/tps.2010.2042182	journal	April 2010
MHD Equilibrium Reconstruction in the DIII-D Tokamak Lao, L. L.; John, H. E. St.; Peng, Q. Fusion Science and Technology, Vol. 48, Issue 2 https://doi.org/10.13182/fst48-968	journal	October 2005

Similar Records

Analysis of MHD stability and active mode control on KSTAR for high confinement, disruption-free plasma

Journal Article · Thu Apr 09 20:00:00 EDT 2020 · Nuclear Fusion · OSTI ID:1650665

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
KSTAR
MHD stability
kinetic equilibrium reconstruction
kinetic plasma equilibrium reconstruction

Kinetic equilibrium reconstruction and the impact on stability analysis of KSTAR plasmas

Citation Formats

References (37)

Similar Records

Related Subjects