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Computational challenges in magnetic-confinement fusion physics
Magnetic-fusion plasmas are complex self-organized systems with an extremely wide range
of spatial and temporal scales, from the electron-orbit scales (∼ 10− 11 s,∼ 10− 5 m) to the …
of spatial and temporal scales, from the electron-orbit scales (∼ 10− 11 s,∼ 10− 5 m) to the …
Real-time physics-model-based simulation of the current density profile in tokamak plasmas
A new paradigm is presented to reconstruct the plasma current density profile in a tokamak
in real-time. The traditional method of basing the reconstruction on real-time diagnostics …
in real-time. The traditional method of basing the reconstruction on real-time diagnostics …
Real-time capable modeling of neutral beam injection on NSTX-U using neural networks
MD Boyer, S Kaye, K Erickson - Nuclear Fusion, 2019 - iopscience.iop.org
A new model of heating, current drive, torque and other effects of neutral beam injection on
NSTX-U that uses neural networks has been developed. The model has been trained and …
NSTX-U that uses neural networks has been developed. The model has been trained and …
Non-linear model-based optimization of actuator trajectories for tokamak plasma profile control
A computational method is presented to determine the tokamak actuator time evolution
(trajectories) required to optimally reach a given point in the tokamak operating space while …
(trajectories) required to optimally reach a given point in the tokamak operating space while …
Real-time-capable prediction of temperature and density profiles in a tokamak using RAPTOR and a first-principle-based transport model
F Felici, J Citrin, AA Teplukhina, J Redondo… - Nuclear …, 2018 - iopscience.iop.org
The RAPTOR code is a control-oriented core plasma profile simulator with various
applications in control design and verification, discharge optimization and real-time plasma …
applications in control design and verification, discharge optimization and real-time plasma …
[HTML][HTML] Novel aspects of plasma control in ITER
ITER plasma control design solutions and performance requirements are strongly driven by
its nuclear mission, aggressive commissioning constraints, and limited number of …
its nuclear mission, aggressive commissioning constraints, and limited number of …
First-principles-driven model-based current profile control for the DIII-D tokamak via LQI optimal control
In tokamak fusion plasmas, control of the spatial distribution profile of the toroidal plasma
current plays an important role in realizing certain advanced operating scenarios. These …
current plays an important role in realizing certain advanced operating scenarios. These …
Control of the tokamak safety factor profile with time-varying constraints using MPC
A controller is designed for the tokamak safety factor profile that takes real-time-varying
operational and physics limits into account. This so-called model predictive controller (MPC) …
operational and physics limits into account. This so-called model predictive controller (MPC) …
Design and simulation of extremum-seeking open-loop optimal control of current profile in the DIII-D tokamak
In a magnetic fusion reactor, the achievement of a certain type of plasma current profiles,
which are compatible with magnetohydrodynamic stability at high plasma pressure, is key to …
which are compatible with magnetohydrodynamic stability at high plasma pressure, is key to …
Sequential linear quadratic control of bilinear parabolic PDEs based on POD model reduction
We present a framework to solve a finite-time optimal control problem for parabolic partial
differential equations (PDEs) with diffusivity-interior actuators, which is motivated by the …
differential equations (PDEs) with diffusivity-interior actuators, which is motivated by the …