Transport modeling of Alcator C-Mod H-mode Magnetic Field Scan
POSTER
Abstract
The GACODE transport modeling suite is used to predict core temperature and density profiles
for a set of Alcator C-Mod H-mode discharges with on-axis magnetic fields varying from 2.7 to
7.8 Tesla, in order to assess the fidelity of these tools as a function of magnetic field strength.
Assessing their fidelity at high field is particularly important given recent interest in compact
fusion devices. The GACODE tools include NEO (a multi-species drift-kinetic solver that
calculates neoclassical transport), TGLF (a quasilinear gyro-Landau-fluid model which predicts
turbulent transport), and the TGYRO transport solver which utilizes both TGLF and NEO to
predict steady state temperature and density profiles for a given equilibrium and external heating
and current drive sources (taken from TRANSP runs in these cases). Established metrics will be
used to quantify the fidelity of the models as a function of magnetic field strength and TGLF
saturation rules. Uncertainties in both heating source calculations and profiles will be included.
Additional physics studies such as impact of magnetic fluctuations will be included as time
permits.
for a set of Alcator C-Mod H-mode discharges with on-axis magnetic fields varying from 2.7 to
7.8 Tesla, in order to assess the fidelity of these tools as a function of magnetic field strength.
Assessing their fidelity at high field is particularly important given recent interest in compact
fusion devices. The GACODE tools include NEO (a multi-species drift-kinetic solver that
calculates neoclassical transport), TGLF (a quasilinear gyro-Landau-fluid model which predicts
turbulent transport), and the TGYRO transport solver which utilizes both TGLF and NEO to
predict steady state temperature and density profiles for a given equilibrium and external heating
and current drive sources (taken from TRANSP runs in these cases). Established metrics will be
used to quantify the fidelity of the models as a function of magnetic field strength and TGLF
saturation rules. Uncertainties in both heating source calculations and profiles will be included.
Additional physics studies such as impact of magnetic fluctuations will be included as time
permits.
Presenters
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Blake M Carter
Rutgers University
Authors
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Blake M Carter
Rutgers University
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Christopher G Holland
University of California - San Diego, University of California, San Diego
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Nathan T Howard
Massachusetts Institute of Technology MIT, MIT PSFC, Massachusetts Institute of Technology MI
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Pablo Rodriguez-Fernandez
Massachusetts Institute of Technology MI, MIT PSFC, Massachusetts Institute of Technology MIT, MIT, Massachusetts Institute of Technology, MIT Plasma Science and Fusion Center, Cambridge, MA02139, USA
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Dmitriy M Orlov
University of California, San Diego