Impact of Magnetic Field Configuration on Heat Transport in Stellarators and Heliotrons

Warmer, Felix; Tanaka, K.; Xanthopoulos, P.; Nunami, M.; Nakata, M.; Beidler, C.  D.; Bozhenkov, S.  A.; Beurskens, M.  N. A.; Brunner, K.  J.; Ford, O.  P.; Fuchert, G.; Funaba, H.; Geiger, J.; Gradic, D.; Ida, K.; Igami, H.; Kubo, S.; Langenberg, A.; Laqua, H.  P.; Lazerson, S.; Morisaki, T.; Osakabe, M.; Pablant, N.; Pasch, E.; Peterson, B.; Satake, S.; Seki, R.; Shimozuma, T.; Smith, H.  M.; Stange, T.; Stechow, A.  v.; Sugama, H.; Suzuki, Y.; Takahashi, H.; Tokuzawa, T.; Tsujimura, T.; Turkin, Y.; Wolf, R.  C.; Yamada, I.; Yanai, R.; Yasuhara, R.; Yokoyama, M.; Yoshimura, Y.; Yoshinuma, M.; Zhang, D.; LHD Experimental Group,

doi:10.1103/physrevlett.127.225001

Impact of Magnetic Field Configuration on Heat Transport in Stellarators and Heliotrons

Journal Article · Wed Nov 24 00:00:00 EST 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.127.225001· OSTI ID:1881318

^[1]; Tanaka, K.; Xanthopoulos, P.; Nunami, M.; Nakata, M.; Beidler, C. D.; Bozhenkov, S. A.; Beurskens, M. N. A.; Brunner, K. J.; Ford, O. P.; Fuchert, G.; Funaba, H.; Geiger, J.; Gradic, D.; Ida, K.; Igami, H.; Kubo, S.; Langenberg, A.; Laqua, H. P.; Lazerson, S. more »

Max-Planck-Institut für Plasmaphysik, GREifswald (Germany); W7-X Team. et al.

We assess the magnetic field configuration in modern fusion devices by comparing experiments with the same heating power, between a stellarator and a heliotron. The key role of turbulence is evident in the optimized stellarator, while neoclassical processes largely determine the transport in the heliotron device. Gyrokinetic simulations elucidate the underlying mechanisms promoting stronger ion scale turbulence in the stellarator. Similar plasma performances in these experiments suggests that neoclassical and turbulent transport should both be optimized in next step reactor designs.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: EUROfusion Consortium; Japan Society for the Promotion of Science (JSPS); National Institute of Fundamental Studies (NIFS); USDOE

Contributing Organization:: LHD experimental Group; W7-X Team

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1881318

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 127; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (47)

Quasi-helically symmetric toroidal stellarators Nührenberg, J.; Zille, R. Physics Letters A, Vol. 129, Issue 2 https://doi.org/10.1016/0375-9601(88)90080-1	journal	May 1988
Recent Upgrading of ECRH System and Studies to Improve ECRH Performance in the LHD Igami, Hiroe; Kubo, Shin; Shimozuma, Takashi EPJ Web of Conferences, Vol. 87 https://doi.org/10.1051/epjconf/20158702011	journal	January 2015
Radial and zonal modes in hyperfine-scale stellarator turbulence Jenko, F.; Kendl, A. Physics of Plasmas, Vol. 9, Issue 10 https://doi.org/10.1063/1.1507591	journal	October 2002
Transport optimization in stellarators Mynick, H. E. Physics of Plasmas, Vol. 13, Issue 5 https://doi.org/10.1063/1.2177643	journal	May 2006
Gyrokinetic turbulent transport simulation of a high ion temperature plasma in large helical device experiment Nunami, M.; Watanabe, T. -H.; Sugama, H. Physics of Plasmas, Vol. 19, Issue 4 https://doi.org/10.1063/1.4704568	journal	April 2012
Collisionless microinstabilities in stellarators. III. The ion-temperature-gradient mode Plunk, G. G.; Helander, P.; Xanthopoulos, P. Physics of Plasmas, Vol. 21, Issue 3 https://doi.org/10.1063/1.4868412	journal	March 2014
The Thomson scattering system at Wendelstein 7-X Pasch, E.; Beurskens, M. N. A.; Bozhenkov, S. A. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4962248	journal	September 2016
Charge exchange recombination spectroscopy at Wendelstein 7-X Ford, O. P.; Vanó, L.; Alonso, J. A. Review of Scientific Instruments, Vol. 91, Issue 2 https://doi.org/10.1063/1.5132936	journal	February 2020
Variational bounds for transport coefficients in three‐dimensional toroidal plasmas van Rij, W. I.; Hirshman, S. P. Physics of Fluids B: Plasma Physics, Vol. 1, Issue 3 https://doi.org/10.1063/1.859116	journal	March 1989
Toroidal drift modes driven by ion pressure gradients Horton, Wendell Physics of Fluids, Vol. 24, Issue 6 https://doi.org/10.1063/1.863486	journal	January 1981
Field‐aligned coordinates for nonlinear simulations of tokamak turbulence Beer, M. A.; Cowley, S. C.; Hammett, G. W. Physics of Plasmas, Vol. 2, Issue 7 https://doi.org/10.1063/1.871232	journal	August 1995
Electron temperature gradient driven turbulence Jenko, F.; Dorland, W.; Kotschenreuther, M. Physics of Plasmas, Vol. 7, Issue 5 https://doi.org/10.1063/1.874014	journal	May 2000
Characterization of energy confinement in net-current free plasmas using the extended International Stellarator Database Yamada, H.; Harris, J. H.; Dinklage, A. Nuclear Fusion, Vol. 45, Issue 12 https://doi.org/10.1088/0029-5515/45/12/024	journal	November 2005
Velocity–space structures of distribution function in toroidal ion temperature gradient turbulence Watanabe, T. -H; Sugama, H. Nuclear Fusion, Vol. 46, Issue 1 https://doi.org/10.1088/0029-5515/46/1/003	journal	December 2005
Integrated physics optimization of a quasi-isodynamic stellarator with poloidally closed contours of the magnetic field strength Subbotin, A. A.; Mikhailov, M. I.; Shafranov, V. D. Nuclear Fusion, Vol. 46, Issue 11 https://doi.org/10.1088/0029-5515/46/11/006	journal	September 2006
Effects of equilibrium-scale radial electric fields on zonal flows and turbulence in helical configurations Watanabe, T. H.; Sugama, H.; Nunami, M. Nuclear Fusion, Vol. 51, Issue 12 https://doi.org/10.1088/0029-5515/51/12/123003	journal	November 2011
Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS) Beidler, C. D.; Allmaier, K.; Isaev, M. Yu. Nuclear Fusion, Vol. 51, Issue 7 https://doi.org/10.1088/0029-5515/51/7/076001	journal	June 2011
Turbulent transport of heat and particles in a high ion temperature discharge of the Large Helical Device Ishizawa, A.; Watanabe, T. -H.; Sugama, H. Nuclear Fusion, Vol. 55, Issue 4 https://doi.org/10.1088/0029-5515/55/4/043024	journal	March 2015
An improved formulation of the ripple-averaged kinetic theory of neoclassical transport in stellarators Beidler, C. D.; Maaßberg, H. Plasma Physics and Controlled Fusion, Vol. 43, Issue 8 https://doi.org/10.1088/0741-3335/43/8/307	journal	July 2001
Zonal flows in plasma—a review Diamond, P. H.; Itoh, S-I; Itoh, K. Plasma Physics and Controlled Fusion, Vol. 47, Issue 5 https://doi.org/10.1088/0741-3335/47/5/R01	journal	April 2005
Turbulent optimization of toroidal configurations Mynick, H.; Xanthopoulos, P.; Faber, B. Plasma Physics and Controlled Fusion, Vol. 56, Issue 9 https://doi.org/10.1088/0741-3335/56/9/094001	journal	August 2014
Stable sustainment of plasmas with electron internal transport barrier by ECH in the LHD Yoshimura, Y.; Kasahara, H.; Tokitani, M. Plasma Physics and Controlled Fusion, Vol. 60, Issue 2 https://doi.org/10.1088/1361-6587/aa9950	journal	December 2017
Particle transport of electron cyclotron resonant heating plasma in Large Helical Device Ohtani, Yoshiaki; Tanaka, Kenji; Tokuzawa, Tokihiko Plasma Physics and Controlled Fusion, Vol. 62, Issue 2 https://doi.org/10.1088/1361-6587/ab5b1f	journal	January 2020
Extended investigations of isotope effects on ECRH plasma in LHD Tanaka, K.; Nakata, M.; Ohtani, Y. Plasma Physics and Controlled Fusion, Vol. 62, Issue 2 https://doi.org/10.1088/1361-6587/ab5bae	journal	December 2019
Extension of the operational regime of the LHD towards a deuterium experiment Takeiri, Y.; Morisaki, T.; Osakabe, M. Nuclear Fusion, Vol. 57, Issue 10 https://doi.org/10.1088/1741-4326/aa7fc2	journal	August 2017
Energy confinement of hydrogen and deuterium electron-root plasmas in the Large Helical Device Warmer, Felix; Takahashi, H.; Tanaka, K. Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad611	journal	August 2018
Overview of first Wendelstein 7-X high-performance operation Klinger, T.; Andreeva, T.; Bozhenkov, S. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab03a7	journal	June 2019
Increasing the density in Wendelstein 7-X: benefits and limitations Fuchert, G.; Brunner, K. J.; Rahbarnia, K. Nuclear Fusion, Vol. 60, Issue 3 https://doi.org/10.1088/1741-4326/ab6d40	journal	February 2020
High-performance plasmas after pellet injections in Wendelstein 7-X Bozhenkov, S. A.; Kazakov, Y.; Ford, O. P. Nuclear Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1741-4326/ab7867	journal	May 2020
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
Reduction of Turbulent Transport with Zonal Flows Enhanced in Helical Systems Watanabe, T. -H.; Sugama, H.; Ferrando-Margalet, S. Physical Review Letters, Vol. 100, Issue 19 https://doi.org/10.1103/PhysRevLett.100.195002	journal	May 2008
Optimizing Stellarators for Turbulent Transport Mynick, H. E.; Pomphrey, N.; Xanthopoulos, P. Physical Review Letters, Vol. 105, Issue 9 https://doi.org/10.1103/PhysRevLett.105.095004	journal	August 2010
Controlling Turbulence in Present and Future Stellarators Xanthopoulos, P.; Mynick, H. E.; Helander, P. Physical Review Letters, Vol. 113, Issue 15 https://doi.org/10.1103/PhysRevLett.113.155001	journal	October 2014
Distinct Turbulence Saturation Regimes in Stellarators Plunk, G. G.; Xanthopoulos, P.; Helander, P. Physical Review Letters, Vol. 118, Issue 10 https://doi.org/10.1103/PhysRevLett.118.105002	journal	March 2017
Isotope Effects on Trapped-Electron-Mode Driven Turbulence and Zonal Flows in Helical and Tokamak Plasmas Nakata, Motoki; Nunami, Masanori; Sugama, Hideo Physical Review Letters, Vol. 118, Issue 16 https://doi.org/10.1103/PhysRevLett.118.165002	journal	April 2017
Turbulence Mechanisms of Enhanced Performance Stellarator Plasmas Xanthopoulos, P.; Bozhenkov, S. A.; Beurskens, M. N. Physical Review Letters, Vol. 125, Issue 7 https://doi.org/10.1103/PhysRevLett.125.075001	journal	August 2020
Reduction of Ion Thermal Diffusivity Associated with the Transition of the Radial Electric Field in Neutral-Beam-Heated Plasmas in the Large Helical Device Ida, K.; Funaba, H.; Kado, S. Physical Review Letters, Vol. 86, Issue 23 https://doi.org/10.1103/PhysRevLett.86.5297	journal	June 2001
Dynamics of Zonal Flows in Helical Systems Sugama, H.; Watanabe, T. -H. Physical Review Letters, Vol. 94, Issue 11 https://doi.org/10.1103/PhysRevLett.94.115001	journal	March 2005
Foundations of nonlinear gyrokinetic theory Brizard, A. J.; Hahm, T. S. Reviews of Modern Physics, Vol. 79, Issue 2 https://doi.org/10.1103/RevModPhys.79.421	journal	April 2007
Current Control by ECCD for W7-X Turkin, Yu.; Maassberg, H.; Beidler, C. D. Fusion Science and Technology, Vol. 50, Issue 3 https://doi.org/10.13182/FST06-5	journal	October 2006
Electron Cyclotron Heating for W7-X: Physics and Technology Erckmann, V.; Brand, P.; Braune, H. Fusion Science and Technology, Vol. 52, Issue 2 https://doi.org/10.13182/FST07-A1508	journal	August 2007
Particle Transport of LHD Tanaka, K.; Kawahata, K.; Tokuzawa, T. Fusion Science and Technology, Vol. 58, Issue 1 https://doi.org/10.13182/FST10-A10795	journal	August 2010
Recent Progress of the LHD Thomson Scattering System Yamada, I.; Narihara, K.; Funaba, H. Fusion Science and Technology, Vol. 58, Issue 1 https://doi.org/10.13182/FST10-A10820	journal	August 2010
Charge-Exchange Spectroscopy with Pitch-Controlled Double-Slit Fiber Bundle on LHD Yoshinuma, M.; Ida, K.; Yokoyama, M. Fusion Science and Technology, Vol. 58, Issue 1 https://doi.org/10.13182/FST10-A10823	journal	August 2010
Density Reconstruction Using a Multi-Channel Far-Infrared Laser Interferometer and Particle Transport Study of a Pellet-Injected Plasma on the LHD Tanaka, Kenji; Kawahata, Kazuo; Tokuzawa, Tokihiko Plasma and Fusion Research, Vol. 3 https://doi.org/10.1585/pfr.3.050	journal	January 2008
Gyrokinetic Vlasov Code Including Full Three-dimensional Geometry of Experiments Nunami, Masanori; Watanabe, Tomo-Hiko; Sugama, Hideo Plasma and Fusion Research, Vol. 5 https://doi.org/10.1585/pfr.5.016	journal	January 2010
Linear Gyrokinetic Analyses of ITG Modes and Zonal Flows in LHD with High Ion Temperature Nunami, Masanori; Watanabe, Tomo-Hiko; Sugama, Hideo Plasma and Fusion Research, Vol. 6 https://doi.org/10.1585/pfr.6.1403001	journal	January 2011

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Impact of Magnetic Field Configuration on Heat Transport in Stellarators and Heliotrons

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