energy department the mhd control system for the ftu tokamak gabriele d’antona, sante cirant,...

Energy Department

The MHD Control System for the FTU Tokamak

Gabriele D’Antona, Sante Cirant, Mohsen Davoudi

RTC 2010

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Controller MirrorsDrive

Mirrorangles

Reference signal

Plasma

a mirrors

model rdep

model rtarget Equilibrium

CODE

Ray tracingCODE

Btor

Bpol

ne(r)J(r)

ECE

Mirnov

ECRHMod.

Correlation

Correlation

Correlation

Fusion

Assimilation

Assimilation

rdep

rtarget

Assimilation

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Real-time Controller

The objective:To control MHD plasma instabilities in FTU using EC power deposition. This requires:-Mode detection-Mode tracking by EC deposition

Actuators:2 Antennas (each with 3 degree of freedom) and 2 EC Power Gyrotrons

Sensors:

12 ECE, 5 Mirnov coils and 6 encoders for each launcher axis

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Each launcher is moved by three AC brushless motors. The two launchers will scan rDEP in the range 0<rDEP/a<0.75 with an accuracy of 0.5 cm and a dynamical performance of 1 cm to be scanned in 10 ms.

Antennas

The Application

Motors