Verification and application of resonance broadened quasilinear (RBQ) model with multiple Alfvénic instabilities
Abstract
The resonance broadened quasilinear (RBQ) model for the problem of relaxing the hot ion distribution function in constantofmotion 3D space [Gorelenkov et al., Nucl. Fusion 58, 082016 (2018)] is presented with the selfconsistent evolution of multiple Alfvén eigenmode amplitudes. The RBQ model represents the generalization of the earlier published model [Berk et al., Nucl. Fusion 35, 1661 (1995)] by carefully examining the wave particle interaction in the presence of realistic Alfvén eigenmode (AE) structures and pitch angle scattering with the help of the guiding center code ORBIT. One aspect of the generalization is that the RBQ model goes beyond the local perturbativependulumlike approximation for the wave particle dynamics near the resonance. An iterative procedure is introduced to account for eigenstructures varying within the resonances. It is found that a radially localized mode structure implies a saturation level 2–3 times smaller than that predicted by an earlier bumpontail quasilinear model that employed uniform mode structures. We apply the RBQ code to a DIIID plasma with an elevated qprofile where the beam ion profiles exhibit stiff transport properties [Collins et al., Phys. Rev. Lett. 116, 095001 (2016)]. Finally, the properties of AE driven fast ion distribution relaxation are studied for validations ofmore »
 Authors:

 Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
 General Atomics, San Diego, CA (United States)
 Publication Date:
 Research Org.:
 Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1557588
 Alternate Identifier(s):
 OSTI ID: 1545413
 Grant/Contract Number:
 AC0209CH11466; FC0204ER54698
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 26; Journal Issue: 7; Journal ID: ISSN 1070664X
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Gorelenkov, N. N., Duarte, V. N., Collins, C. S., Podestà, M., and White, R. B. Verification and application of resonance broadened quasilinear (RBQ) model with multiple Alfvénic instabilities. United States: N. p., 2019.
Web. doi:10.1063/1.5087252.
Gorelenkov, N. N., Duarte, V. N., Collins, C. S., Podestà, M., & White, R. B. Verification and application of resonance broadened quasilinear (RBQ) model with multiple Alfvénic instabilities. United States. https://doi.org/10.1063/1.5087252
Gorelenkov, N. N., Duarte, V. N., Collins, C. S., Podestà, M., and White, R. B. Mon .
"Verification and application of resonance broadened quasilinear (RBQ) model with multiple Alfvénic instabilities". United States. https://doi.org/10.1063/1.5087252. https://www.osti.gov/servlets/purl/1557588.
@article{osti_1557588,
title = {Verification and application of resonance broadened quasilinear (RBQ) model with multiple Alfvénic instabilities},
author = {Gorelenkov, N. N. and Duarte, V. N. and Collins, C. S. and Podestà, M. and White, R. B.},
abstractNote = {The resonance broadened quasilinear (RBQ) model for the problem of relaxing the hot ion distribution function in constantofmotion 3D space [Gorelenkov et al., Nucl. Fusion 58, 082016 (2018)] is presented with the selfconsistent evolution of multiple Alfvén eigenmode amplitudes. The RBQ model represents the generalization of the earlier published model [Berk et al., Nucl. Fusion 35, 1661 (1995)] by carefully examining the wave particle interaction in the presence of realistic Alfvén eigenmode (AE) structures and pitch angle scattering with the help of the guiding center code ORBIT. One aspect of the generalization is that the RBQ model goes beyond the local perturbativependulumlike approximation for the wave particle dynamics near the resonance. An iterative procedure is introduced to account for eigenstructures varying within the resonances. It is found that a radially localized mode structure implies a saturation level 2–3 times smaller than that predicted by an earlier bumpontail quasilinear model that employed uniform mode structures. We apply the RBQ code to a DIIID plasma with an elevated qprofile where the beam ion profiles exhibit stiff transport properties [Collins et al., Phys. Rev. Lett. 116, 095001 (2016)]. Finally, the properties of AE driven fast ion distribution relaxation are studied for validations of the applied RBQ model in DIIID discharges. Initial results show that the model is robust, is numerically efficient, and can predict fast ion relaxation in present and future burning plasma experiments.},
doi = {10.1063/1.5087252},
journal = {Physics of Plasmas},
number = 7,
volume = 26,
place = {United States},
year = {2019},
month = {7}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
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