Fullwave simulations of ICRF heating regimes in toroidal plasma with nonMaxwellian distribution functions
At the power levels required for significant heating and current drive in magneticallyconfined toroidal plasma, modification of the particle distribution function from a Maxwellian shape is likely (Stix 1975 Nucl. Fusion 15 737), with consequent changes in wave propagation and in the location and amount of absorption. In order to study these effects computationally, both the finiteLarmorradius and the highharmonic fast wave (HHFW), versions of the fullwave, hotplasma toroidal simulation code TORIC (Brambilla 1999 Plasma Phys. Control. Fusion 41 1 and Brambilla 2002 Plasma Phys. Control. Fusion 44 2423), have been extended to allow the prescription of arbitrary velocity distributions of the form f(v(parallel to), v(perpendicular to) , psi, theta). For hydrogen (H) minority heating of a deuterium (D) plasma with anisotropic Maxwellian H distributions, the fractional H absorption varies significantly with changes in parallel temperature but is essentially independent of perpendicular temperature. On the other hand, for HHFW regime with anisotropic Maxwellian fast ion distribution, the fractional beam ion absorption varies mainly with changes in the perpendicular temperature. The evaluation of the wavefield and power absorption, through the full wave solver, with the ion distribution function provided by either a MonteCarlo particle and FokkerPlanck codes is also examined formore »
 Authors:

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 Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
 XCEL Engineering Inc., Oak Ridge, TN (United States)
 Publication Date:
 Grant/Contract Number:
 FC0201ER54648; AC02CH0911466
 Type:
 Accepted Manuscript
 Journal Name:
 Nuclear Fusion
 Additional Journal Information:
 Journal Volume: 57; Journal Issue: 5; Related Information: The digital data for this paper can be found following the links from http://arks.princeton.edu/ark:/88435/dsp01g445cg642; Journal ID: ISSN 00295515
 Publisher:
 IOP Science
 Research Org:
 Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
 Sponsoring Org:
 USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC24)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Tokamak; ICRH; Waves; Plasma; HHFW; Minority heating; Tokamak plasmas; Absorption; Equations; Geometry; Nstx
 OSTI Identifier:
 1353395
Bertelli, N., Valeo, E. J., Green, D. L., Gorelenkova, M., Phillips, C. K., Podestà, M., Lee, J. P., Wright, J. C., and Jaeger, E. F.. Fullwave simulations of ICRF heating regimes in toroidal plasma with nonMaxwellian distribution functions. United States: N. p.,
Web. doi:10.1088/17414326/aa66db.
Bertelli, N., Valeo, E. J., Green, D. L., Gorelenkova, M., Phillips, C. K., Podestà, M., Lee, J. P., Wright, J. C., & Jaeger, E. F.. Fullwave simulations of ICRF heating regimes in toroidal plasma with nonMaxwellian distribution functions. United States. doi:10.1088/17414326/aa66db.
Bertelli, N., Valeo, E. J., Green, D. L., Gorelenkova, M., Phillips, C. K., Podestà, M., Lee, J. P., Wright, J. C., and Jaeger, E. F.. 2017.
"Fullwave simulations of ICRF heating regimes in toroidal plasma with nonMaxwellian distribution functions". United States.
doi:10.1088/17414326/aa66db. https://www.osti.gov/servlets/purl/1353395.
@article{osti_1353395,
title = {Fullwave simulations of ICRF heating regimes in toroidal plasma with nonMaxwellian distribution functions},
author = {Bertelli, N. and Valeo, E. J. and Green, D. L. and Gorelenkova, M. and Phillips, C. K. and Podestà, M. and Lee, J. P. and Wright, J. C. and Jaeger, E. F.},
abstractNote = {At the power levels required for significant heating and current drive in magneticallyconfined toroidal plasma, modification of the particle distribution function from a Maxwellian shape is likely (Stix 1975 Nucl. Fusion 15 737), with consequent changes in wave propagation and in the location and amount of absorption. In order to study these effects computationally, both the finiteLarmorradius and the highharmonic fast wave (HHFW), versions of the fullwave, hotplasma toroidal simulation code TORIC (Brambilla 1999 Plasma Phys. Control. Fusion 41 1 and Brambilla 2002 Plasma Phys. Control. Fusion 44 2423), have been extended to allow the prescription of arbitrary velocity distributions of the form f(v(parallel to), v(perpendicular to) , psi, theta). For hydrogen (H) minority heating of a deuterium (D) plasma with anisotropic Maxwellian H distributions, the fractional H absorption varies significantly with changes in parallel temperature but is essentially independent of perpendicular temperature. On the other hand, for HHFW regime with anisotropic Maxwellian fast ion distribution, the fractional beam ion absorption varies mainly with changes in the perpendicular temperature. The evaluation of the wavefield and power absorption, through the full wave solver, with the ion distribution function provided by either a MonteCarlo particle and FokkerPlanck codes is also examined for Alcator CMod and NSTX plasmas. NonMaxwellian effects generally tend to increase the absorption with respect to the equivalent Maxwellian distribution.},
doi = {10.1088/17414326/aa66db},
journal = {Nuclear Fusion},
number = 5,
volume = 57,
place = {United States},
year = {2017},
month = {4}
}