Current drive and current profile control studies in the Tokamak Physics Experiment (TPX)

1996 ◽  
Author(s):  
P. T. Bonoli ◽  
M. Porkolab ◽  
L. Sugiyama ◽  
C. Kessel
Keyword(s):  
Current Drive ◽  
Current Profile ◽  
Profile Control ◽  
Physics Experiment

Current profile control and stability studies in the tokamak physics experiment (TPX)

1994 ◽  
Author(s):  
M. Porkolab ◽  
P. T. Bonoli ◽  
J. J. Ramos ◽  
M. E. Fenstermacher
Keyword(s):  
Stability Studies ◽  
Current Profile ◽  
Profile Control ◽  
Physics Experiment

scholarly journals Low EffortLiNuclear Fusion Plasma Control Using Model Predictive Control Laws

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Izaskun Garrido ◽  
Aitor J. Garrido ◽  
Jesús A. Romero ◽  
Edorta Carrascal ◽  
Goretti Sevillano-Berasategui ◽  
...  
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Fusion Energy ◽  
Current Drive ◽  
Current Profile ◽  
Fusion Plasma ◽  
Successful Operation ◽  
Control Laws ◽  
Internal Inductance ◽  
Profile Control

One of the main problems of fusion energy is to achieve longer pulse duration by avoiding the premature reaction decay due to plasma instabilities. The control of the plasma inductance arises as an essential tool for the successful operation of tokamak fusion reactors in order to overcome stability issues as well as the new challenges specific to advanced scenarios operation. In this sense, given that advanced tokamaks will suffer from limited power available from noninductive current drive actuators, the transformer primary coil could assist in reducing the power requirements of the noninductive current drive sources needed for current profile control. Therefore, tokamak operation may benefit from advanced control laws beyond the traditionally used PID schemes by reducing instabilities while guaranteeing the tokamak integrity. In this paper, a novel model predictive control (MPC) scheme has been developed and successfully employed to optimize both current and internal inductance of the plasma, which influences the L-H transition timing, the density peaking, and pedestal pressure. Results show that the internal inductance and current profiles can be adequately controlled while maintaining the minimal control action required in tokamak operation.

Steady-state fully noninductive operation with electron cyclotron current drive and current profile control in the tokamak à configuration variable (TCV)

2001 ◽  
Vol 8 (5) ◽  
pp. 2199-2207 ◽  
Author(s):  
O. Sauter ◽  
C. Angioni ◽  
S. Coda ◽  
P. Gomez ◽  
T. P. Goodman ◽  
...  
Keyword(s):  
Steady State ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Current Profile ◽  
Profile Control

scholarly journals Tests of advanced RF off-axis current drive techniques on DIII-D

2019 ◽  
Vol 203 ◽  
pp. 02008 ◽  
Author(s):  
R.I. Pinsker ◽  
X. Chen ◽  
J.M. Lohr ◽  
C.P. Moeller ◽  
M. Porkolab ◽  
...  
Keyword(s):  
High Field ◽  
Power Level ◽  
Current Drive ◽  
Lower Hybrid ◽  
Current Profile ◽  
Tokamak Reactor ◽  
Radiofrequency Heating ◽  
Profile Control ◽  
Bootstrap Current ◽  
Fast Waves

The establishment of reactor-relevant radiofrequency heating and current drive techniques is a focus of work on DIII-D in the next five-year period. This paper gives an overview of the planned experimental work in the areas of (1) nearly vertically launched ECCD, (2) ‘helicon’ (whistlers or fast waves in the lower hybrid range of frequencies) current drive, and (3) high-field-side-launch (HFS) lower hybrid (slow wave) current drive. Each of these techniques addresses the need for efficient off-axis current drive for a steady-state tokamak reactor to supplement the bootstrap current and to provide current profile control, and each will be experimentally assessed at a coupled power level of ~1 MW on DIII-D in the next few years.

Current Profile Control for ITER with RF Current Drive

1992 ◽  
Author(s):  
David A. Ehst ◽  
Donald L. Pearlstein
Keyword(s):  
Current Drive ◽  
Current Profile ◽  
Profile Control

Current profile control and improvement of current drive efficiency by combined lower hybrid waves in TRIAM-1M

2000 ◽  
Vol 40 (3Y) ◽  
pp. 453-459 ◽  
Author(s):  
M Sakamoto ◽  
S Itoh ◽  
K.N Sato ◽  
K Nakamura ◽  
H Zushi ◽  
...  
Keyword(s):  
Current Drive ◽  
Lower Hybrid ◽  
Current Profile ◽  
Profile Control ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

Numerical simulation of current profile flattening during lower hybrid current drive in JT-60

1990 ◽  
Vol 30 (4) ◽  
pp. 771-775 ◽  
Author(s):  
R. Yoshino ◽  
K. Ushigusa ◽  
T. Imai ◽  
H. Shirai ◽  
K. Shimizu
Keyword(s):  
Numerical Simulation ◽  
Current Drive ◽  
Lower Hybrid ◽  
Current Profile ◽  
Lower Hybrid Current Drive
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