Speaker
Adriano Mele
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.1080.pdf
Shape reconstruction and eddy currents estimation via Kalman Filter at
the EAST tokamak
G. De Tommasi1,2, A. Mele1,2, A. Pironti1,2, B.J. Xiao3
1
Dipartimento di Ingegneria Elettrica e Tecnologie dell’Informazione, Università degli
Studi di Napoli Federico II, via Claudio 21, 80125, Napoli, Italy
2
Consorzio CREATE, via Claudio 21, 80125, Napoli, Italy
3
Institute of Plasma Physics, Chinese Academy of Sciences, 350 Shushanhu Rd., 230031,
Hefei, Anhui, P.R. China
Plasma shape control is a core issue for thermonuclear
fusion reactors. In order to achieve high control
performances, the magnetic control system of a
tokamak device must rely on a fast and accurate shape
reconstruction algorithm, which is capable of precisely
estimating the poloidal flux map that best fits the
available experimental measurements at every control
cycle. In this work, a possible solution to this problem
is discussed, based on the well known Kalman filtering
theory. The CREATE equilibrium codes [1], [2] have
been used to generate linearized models of the plasma
response, which can be embedded in an optimal state
observer in order to achieve a fast and accurate
reconstruction of the
plasma shape, plus an estimate of the eddy currents 1. Comparison between the flux map of the
EAST tokamak reconstructed using Kalman
induced in the passive structures. This reconstruction is filtering (in gray) and the one computed by
EFIT (in red).
also suitable for a real-time implementation, as it entails
only matrix multiplications and a single matrix inversion. As a testbed, the proposed solution
has been applied to experimental data coming from the EAST tokamak.
[1] R. Albanese e F. Villone, «The linearized CREATE-L plasma response model for the control of current,
position and shape in Tokamaks,» Nuclear Fusion, vol. 38, 1998.
[2] R. Albanese, G. Calabrò, M. Mattei e F. Villone, «Plasma response model for current, shape and position
control at JET,» Fusion Engineering Design, vol. 66, pp. 725-728, 2003.
