Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Gerald Navratil"'
Autor:
William Boyes, Francesca Turco, Jeremy M Hanson, Alessandro Marinoni, Alan D Turnbull, Max E Austin, Gerald Navratil
Publikováno v:
Nuclear Fusion.
Negative triangularity experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptive n=2 tearing modes, which experience qmin ≥ 1 similar to the positive triangularity hybrid scenario. Plasmas exhi
Publikováno v:
Plasma Physics and Controlled Fusion.
We present a new algorithm to track the amplitude and phase of rotating MHD modes in tokamak plasmas using high speed imaging cameras and deep learning. This algorithm uses a convolutional neural network (CNN) to predict the amplitudes of the n=1 sin
Autor:
Rian Chandra, Jeffrey Levesque, Yumou Wei, Boting Li, Alex Saperstein, Ian Stewart, Christopher Hansen, Michael Mauel, Gerald Navratil
Publikováno v:
SSRN Electronic Journal.
Publikováno v:
Nuclear Fusion. 62:026044
Halo current (HC) rotation during disruptions can be potentially dangerous if resonant with the structures surrounding a tokamak plasma. We propose a drift-frequency-based scaling law for the rotation frequency of the asymmetric component of the HC a
Autor:
J.P. Levesque, Nikolaus Rath, B. Li, B. DeBono, D.A. Maurer, Gerald Navratil, Michael E. Mauel, Daisuke Shiraki, J.M. Bialek, P.J. Byrne
Publikováno v:
Fusion Engineering and Design. 87:1895-1899
We report on the design of a new plasma control system for the HBT-EP tokamak that utilizes a graphical processing unit (GPU) to magnetically control the 3D perturbed equilibrium state [1] of the plasma. The control system achieves cycle times of 5
Publikováno v:
Nuclear Fusion. 58:126009
Publikováno v:
Nuclear Fusion. 58:046017
Autor:
Gerald Navratil, T. Sunn Pedersen, R. James, J.M. Bialek, Jeremy Hanson, O. Katsuro-Hopkins, A. Klein, Y. Liu, D.A. Maurer, Michael E. Mauel
Publikováno v:
Nuclear Fusion. 47:1293-1299
We report on recent advances in modelling and experiments on resistive wall mode feedback control. The first experimental demonstration of feedback suppression of rotating external kink modes near the ideal wall limit in a tokamak is described [1]. T
Publikováno v:
Nuclear Fusion. 47:1157-1165
In order to achieve the highest plasma pressure limits in ITER, resistive wall kink mode stabilization is required. A novel resistive wall mode linear observer and feedback controller designed using model reduction and optimal control theory and empl
Autor:
John Sheffield, Riccardo Betti, Rajesh Maingi, S. F. Knowlton, Dennis Whyte, Gerald Navratil, Jill P. Dahlburg, Steven L. Allen, James W. Van Dam, Steven Sabbagh
Publikováno v:
Journal of Fusion Energy. 24:173-254
This is Volume 2 of a report of a panel established by the U.S. Department of Energy Fusion Energy Sciences Advisory Committee (FESAC) charged to review the three major U.S. fusion facilities. The Panel requested input from each of the three major U.