Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session BP11: Poster Session I:
BEAMS - Coherent radiation and intense laser-driven x-ray sources; Laser-plasma ion accelerators; Relativistic high-energy-density physics and high field physics
MFE - Low Aspect Ratio Tokamaks
9:30 AM - 12:30 PM
Monday, November 8, 2021
Room: Hall A
Abstract: BP11.00026 : Transport Modeling of NSTX/NSTX-U discharges*
Presenter:
Galina Avdeeva
(General Atomics - San Diego)
Authors:
Galina Avdeeva
(General Atomics - San Diego)
Kathreen E Thome
(General Atomics - San Diego)
Sterling P Smith
(General Atomics - San Diego)
Orso-Maria O Meneghini
(General Atomics - San Diego)
Joseph Mcclenaghan
(General Atomics)
Devon J Battaglia
(Princeton Plasma Physics Laboratory)
Walter Guttenfelder
(Princeton Plasma Physics Laboratory)
Stanley M Kaye
(Princeton Plasma Physics Laboratory)
design and operation of steady-state compact fusion pilot plants (CFPP). The National
Spherical Torus Experiment Upgrade (NSTX-U) will advance the physics basis by producing
unique non-inductive regimes at low-aspect ratio that operate at large normalized beta,
bootstrap fraction and toroidal field utilization. However, in order to extrapolate the results
obtained on current STs to next-step devices, a better physics understanding of transport,
stability, and non-inductive start-up is required, as well as the development of predictive
capabilities that span aspect ratio. This work describes the results of plasma transport
modeling performed using the OMFIT framework on previous relevant NSTX/NSTX-U
discharges. Simulations are carried out with the TRANSP and TGYRO modules of OMFIT,
and comparisons between calculated and measured plasma quantities indicate the validity of
these predictive tools. To better understand the underlying transport mechanisms, we have
performed linear turbulence mode analysis using the TGLF model and identified conditions
where this model might be applicable for NSTX plasmas.
*Work supported by US DOE under DE-SC0021113.
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