Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields
Abstract
This paper presents a single mode model that accurately predicts the coupling of applied nonaxisymmetric elds to the plasma response that induces neoclassical toroidal viscosity (NTV) torque in DIII-D H-mode plasmas. The torque is measured and modeled to have a sinusoidal dependence on the relative phase of multiple nonaxisymmetric eld sources, including a minimum in which large amounts of nonaxisymmetric drive is decoupled from the NTV torque. This corresponds to the coupling and decoupling of the applied eld to a NTV-driving mode spectrum. Modeling using the perturbed equilibrium nonambipolar transport (PENT) code con rms an effective single mode coupling between the applied eld and the resultant torque, despite its inherent nonlinearity. The coupling to the NTV mode is shown to have a similar dependence on the relative phasing as that of the IPEC dominant mode, providing a physical basis for the ef cacy of this linear metric in predicting error eld correction optima in NTV dominated regimes.
- Authors:
-
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1254900
- Alternate Identifier(s):
- OSTI ID: 1236989; OSTI ID: 1369074
- Report Number(s):
- PPPL-5135; DOE-GA-54698
Journal ID: ISSN 0029-5515
- Grant/Contract Number:
- AC02-09CH11466; FC02-04ER54698
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 56; Journal Issue: 3; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tokamaks; magnetohydrodynamics; transport properties
Citation Formats
Logan, Nikolas C., Park, Jong -Kyu, Paz-Soldan, Carloa, Lanctot, Matthew J., Smith, Sterling P., and Burrell, K. H. Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields. United States: N. p., 2016.
Web. doi:10.1088/0029-5515/56/3/036008.
Logan, Nikolas C., Park, Jong -Kyu, Paz-Soldan, Carloa, Lanctot, Matthew J., Smith, Sterling P., & Burrell, K. H. Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields. United States. https://doi.org/10.1088/0029-5515/56/3/036008
Logan, Nikolas C., Park, Jong -Kyu, Paz-Soldan, Carloa, Lanctot, Matthew J., Smith, Sterling P., and Burrell, K. H. Fri .
"Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields". United States. https://doi.org/10.1088/0029-5515/56/3/036008. https://www.osti.gov/servlets/purl/1254900.
@article{osti_1254900,
title = {Dependence of neoclassical toroidal viscosity on the poloidal spectrum of applied nonaxisymmetric fields},
author = {Logan, Nikolas C. and Park, Jong -Kyu and Paz-Soldan, Carloa and Lanctot, Matthew J. and Smith, Sterling P. and Burrell, K. H.},
abstractNote = {This paper presents a single mode model that accurately predicts the coupling of applied nonaxisymmetric elds to the plasma response that induces neoclassical toroidal viscosity (NTV) torque in DIII-D H-mode plasmas. The torque is measured and modeled to have a sinusoidal dependence on the relative phase of multiple nonaxisymmetric eld sources, including a minimum in which large amounts of nonaxisymmetric drive is decoupled from the NTV torque. This corresponds to the coupling and decoupling of the applied eld to a NTV-driving mode spectrum. Modeling using the perturbed equilibrium nonambipolar transport (PENT) code con rms an effective single mode coupling between the applied eld and the resultant torque, despite its inherent nonlinearity. The coupling to the NTV mode is shown to have a similar dependence on the relative phasing as that of the IPEC dominant mode, providing a physical basis for the ef cacy of this linear metric in predicting error eld correction optima in NTV dominated regimes.},
doi = {10.1088/0029-5515/56/3/036008},
journal = {Nuclear Fusion},
number = 3,
volume = 56,
place = {United States},
year = {Fri Feb 05 00:00:00 EST 2016},
month = {Fri Feb 05 00:00:00 EST 2016}
}
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Works referencing / citing this record:
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