34 citations · 77 across the 19 of their papers we have counts for
19 papers
Steady state, core, operational optimization of an ARC-like tokamak via plasma composition and shape
A. Saltzman, P. Rodriguez-Fernandez, A. Ho +8
Impurity composition, plasma shape, and pedestal density all provide strong levers on fusion power. Here, we explore the ways in which their variation changes fusion power and seek…
Impact of energetic alpha particles on core turbulence in an ARC-class fusion power plant
J. Hall, N. T Howard, P. Rodriguez-Fernandez +7
In this work, we investigate the impact of fusion-born alpha particles on core turbulence and transport in the ARC tokamak fusion power plant using linear and nonlinear gyrokinetic…
Core-edge integrated modeling of ARC: on the effect of impurity transport and detachment conditions
Marco Muraca, Pablo Rodriguez-Fernandez, Nathaniel T. Howard +5
Integrated modeling of ARC H-modes has been conducted to assess the feasibility of high-performance scenarios compatible with divertor detachment. The analysis incorporates self-co…
How Fusion-Born Alpha Particles Suppress Microturbulence in Burning Plasmas
Alessandro Di Siena, Alejandro Banon Navarro, Pablo Rodriguez-Fernandez +13
A central unresolved question in fusion energy research is whether energetic alpha particles, the primary products of deuterium-tritium fusion reactions, enhance or degrade plasma…
Accelerating integrated modeling with surrogate-based optimization: the MAESTRO workflow
P. Rodriguez-Fernandez, N. T. Howard, J. Hall +14
This paper introduces the MAESTRO workflow, that enables the coupling of the PORTALS framework [P. Rodriguez-Fernandez et al, Nucl. Fusion 2024] with external solvers for the plasm…
Effects of Tungsten Radiative Cooling on Impurity, Heat and Momentum Transport in DIII-D Plasmas
A. Tema Biwole, T. Odstrčil, X. Litaudon +21
A first-of-its-kind experiment was conducted in the DIII-D tokamak under WEST similarity constraints on plasma shape and core parameters. This work presents a detailed transport st…
Efficient dataset construction using active learning and uncertainty-aware neural networks for plasma turbulent transport surrogate models
Aaron Ho, Lorenzo Zanisi, Bram de Leeuw +3
This work demonstrates a proof-of-principle for using uncertainty-aware architectures, in combination with active learning techniques and an in-the-loop physics simulation code as…
Impact of model uncertainty on SPARC operating scenario predictions with empirical modeling
A. Saltzman, P. Rodriguez-Fernandez, T. Body +2
Understanding and accounting for uncertainty helps to ensure next-step tokamaks such as SPARC will robustly achieve their goals. While traditional Plasma OPerating CONtour (POPCON)…
Integrated Modeling of SPARC H-mode Scenarios: Exploration of the Impact of Modeling Assumptions on Predicted Performance
Marco Muraca, Pablo Rodriguez-Fernandez, Nathaniel T. Howard +3
In this paper an extensive database of SPARC H-modes confinement predictions has been provided, to assess its variability with respect to few input assumptions. The simulations hav…
Characterizing the negative triangularity reactor core operating space with integrated modeling
H. S. Wilson, A. O. Nelson, J. McClenaghan +3
NT experiments have demonstrated core performance on par with positive triangularity (PT) H-mode without edge-localized modes (ELMs), encouraging further study of an NT reactor cor…
MANTA: A Negative-Triangularity NASEM-Compliant Fusion Pilot Plant
MANTA Collaboration, G. Rutherford, H. S. Wilson +38
The MANTA (Modular Adjustable Negative Triangularity ARC-class) design study investigated how negative-triangularity (NT) may be leveraged in a compact, fusion pilot plant (FPP) to…
Prediction of Performance and Turbulence in ITER Burning Plasmas via Nonlinear Gyrokinetic Profile Prediction
N. T. Howard, P. Rodriguez-Fernandez, C. Holland +1
Burning plasma performance, transport, and the effect of hydrogen isotope on confinement has been predicted for ITER baseline scenario (IBS) conditions using nonlinear gyrokinetic…
Core performance predictions in projected SPARC first-campaign plasmas with nonlinear CGYRO
P. Rodriguez-Fernandez, N. T. Howard, A. Saltzman +7
This work characterizes the core transport physics of SPARC early-campaign plasmas using the PORTALS-CGYRO framework. Empirical modeling of SPARC plasmas with L-mode confinement in…
Enhancing predictive capabilities in fusion burning plasmas through surrogate-based optimization in core transport solvers
P. Rodriguez-Fernandez, N. T. Howard, A. Saltzman +6
This work presents the PORTALS framework, which leverages surrogate modeling and optimization techniques to enable the prediction of core plasma profiles and performance with nonli…
Predictions of improved confinement in SPARC via energetic particle turbulence stabilization
A. Di Siena, P. Rodriguez-Fernandez, N. T. Howard +8
The recent progress in high-temperature superconductor technologies has led to the design and construction of SPARC, a compact tokamak device expected to reach plasma breakeven wit…
Radiative pulsed L-mode operation in ARC-class reactors
S. J. Frank, C. J. Perks, A. O. Nelson +8
A new ARC-class, highly-radiative, pulsed, L-mode, burning plasma scenario is developed and evaluated as a candidate for future tokamak reactors. Pulsed inductive operation allevia…
Inference of Experimental Radial Impurity Transport on Alcator C-Mod: Bayesian Parameter Estimation and Model Selection
F. Sciortino, N. T. Howard, E. S. Marmar +11
We present a fully Bayesian approach for the inference of radial profiles of impurity transport coefficients and compare its results to neoclassical, gyrofluid and gyrokinetic mode…
Effect of plasma elongation on current dynamics during tokamak disruptions
T. Fülöp, P. Helander, O. Vallhagen +6
Plasma terminating disruptions in tokamaks may result in relativistic runaway electron beams with potentially serious consequences for future devices with large plasma currents. In…
Neutron diagnostics for the physics of a high-field, compact, tokamak
R. A. Tinguely, A. Rosenthal, R. Simpson +18
Advancements in high temperature superconducting technology have opened a path toward high-field, compact fusion devices. This new parameter space introduces both opportunities and…