Gyrokinetic simulation of driftwave instability in field-reversed configuration

Fulton, D. P.; Lau, C. K.; Schmitz, L.; Holod, I.; Lin, Z.; Tajima, T.; Binderbauer, M. W.

doi:10.1063/1.4948285

Title: Gyrokinetic simulation of driftwave instability in field-reversed configuration

Journal Article · Wed May 04 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4948285· OSTI ID:1565473

Fulton, D. P. ^[1];

^[2]; Schmitz, L. ^[3]; Holod, I. ^[2];

^[2]; Tajima, T. ^[3];

^[3]

Tri Alpha Energy, Inc., Rancho Santa Margarita, CA (United States); Univ. of California, Irvine, CA (United States)
Univ. of California, Irvine, CA (United States)
Tri Alpha Energy, Inc., Rancho Santa Margarita, CA (United States)

Following the recent remarkable progress in magnetohydrodynamic (MHD) stability control in the C-2U advanced beam driven field-reversed configuration (FRC), turbulent transport has become one of the foremost obstacles on the path towards an FRC-based fusion reactor. Significant effort has been made to expand kinetic simulation capabilities in FRC magnetic geometry. Here, the recently upgraded Gyrokinetic Toroidal Code (GTC) now accommodates realistic magnetic geometry from the C-2U experiment at Tri Alpha Energy, Inc. and is optimized to efficiently handle the FRC's magnetic field line orientation. Initial electrostatic GTC simulations find that ion-scale instabilities are linearly stable in the FRC core for realistic pressure gradient drives. Estimated instability thresholds from linear GTC simulations are qualitatively consistent with critical gradients determined from experimental Doppler backscattering fluctuation data, which also find ion scale modes to be depressed in the FRC core. Beyond GTC, A New Code (ANC) has been developed to accurately resolve the magnetic field separatrix and address the interaction between the core and scrape-off layer regions, which ultimately determines global plasma confinement in the FRC. The current status of ANC and future development targets are discussed.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: TAE Team

Grant/Contract Number:: AC05-00OR22725; AC02-05CH11231

OSTI ID:: 1565473

Alternate ID(s):: OSTI ID: 1250974

Journal Information:: Physics of Plasmas, Vol. 23, Issue 5; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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Cited By (4)

Combination Doppler backscattering/cross-polarization scattering diagnostic for the C-2W field-reversed configuration Schmitz, L.; Deng, B.; Thompson, M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038914	journal	October 2018
Global simulation of ion temperature gradient instabilities in a field-reversed configuration Bao, J.; Lau, C. K.; Lin, Z. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5087079	journal	April 2019
Formation of hot, stable, long-lived field-reversed configuration plasmas on the C-2W device Gota, H.; Binderbauer, M. W.; Tajima, T. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab0be9	journal	June 2019
Cross-separatrix simulations of turbulent transport in the field-reversed configuration Lau, C. K.; Fulton, D. P.; Bao, J. Nuclear Fusion, Vol. 59, Issue 6 https://doi.org/10.1088/1741-4326/ab1578	journal	May 2019

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