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  4. Real time plasma current and elongation control using ECRH actuators
 
conference paper

Real time plasma current and elongation control using ECRH actuators

Paley, J. I.  
•
Coda, S.  
•
Camenen, Y.  
2007
34th EPS Conference on Plasma Physics
<b>34th EPS Conference on Plasma Physics</b>

Experiments have been carried out on TCV using Electron Cyclotron Resonance Heating (ECRH) actuators to control the plasma current and elongation in real time. In fully non-inductive plasmas, the plasma current may be driven entirely by ECCD on TCV. By replacing the Ohmic coils with the gyrotron power supplies, we were able to control the plasma current in real time. In tokamak plasmas, the elongation is usually controlled by the quadrupole magnetic field from the poloidal field coils. Applying off-axis ECRH, the current profile is flattened reducing the plasma internal inductance, and at constant quadrupole field, the plasma elongates (κ ~ 2.4) [1]. This paper reports on experiments to control the plasma elongation using a real time elongation observer and the ECRH power actuator to control the current profile. As the plasma elongates, the ECRH deposition becomes more central. Therefore a deposition tracking control was developed which tracked the ECRH deposition at constant ρ by controlling the ECRH launcher mirror position.

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Type
conference paper
Author(s)
Paley, J. I.  
Coda, S.  
Camenen, Y.  
Date Issued

2007

Published in
34th EPS Conference on Plasma Physics
Subjects

control

•

elongation

•

current

•

fusion

•

plasma

URL

URL

http://crpplocal.epfl.ch/pinboard/papers/075001410.pdf
Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
CRPP  
SPC  
Event nameEvent placeEvent date
<b>34th EPS Conference on Plasma Physics</b>

Warsaw Congress Centre, Poland

2-6 July 2007

Available on Infoscience
December 8, 2009
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/44726
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