Accès ouvert
2024
article
OpenAlex
Álvaro Sánchez-Villar, Zhe Bai, N. Bertelli, E. W. Bethel et autres
Abstract A real-time capable core Ion Cyclotron Range of Frequencies (ICRF) heating model on NSTX and WEST is developed. The model is based on two nonlinear regression algorithms, the random forest ensemble of decision trees and the multilayer perceptron neural network. The …
us, fr
(code pays fourni par la source)
Accès ouvert
2023
conference-paper
OpenAlex
G. M. Wallace, Zhe Bai, N. Bertelli, E. W. Bethel et autres
Three machine learning techniques (multilayer perceptron, random forest, and Gaussian process) provide fast surrogate models for lower hybrid current drive (LHCD) simulations. A single GENRAY/CQL3D simulation without radial diffusion of fast electrons requires several minutes of wall-clock time to complete, which is …
us
(code pays fourni par la source)
Accès ouvert
2020
conference-paper
OpenAlex
N. Bertelli, S. Shiraiwa, G. Krämer, Xiaokang Yang et autres
This paper reports the significant advancement of our ability to model and to understand how RF waves interact with the SOL plasma, by simulating the full torus 3D SOL plasma together with the antenna and core plasma. We introduce and use a …
us
(code pays fourni par la source)