Speaker
Carlo Neri
(ENEA CR Frascati)
Description
The plasma pulse phase of Frascati Tokamak Upgrade (FTU) is driven by the dedicated system FSC (Fast Sequence Control), which has been developed in order to send all the necessary commands to the different power plants feeding the toroidal and poloidal coils during the plasma discharge, meanwhile controlling the correct outcome. In case of incorrect execution of the sequence the system is able to emit an alternative recovery sequence in order to safely shutdown the power plants and the plasma pulse. Furthermore the FSC has an embedded event recording feature to record and timestamp all the commands, states and possible alarms.
The FSC system has been recently upgraded porting it to an up to date off the shelf hardware platform, taking this opportunity to revise and update the basic concepts of the system and increase its flexibility in view of applications to future fusion machines.
In detail the system is equipped with an integrated configurator in order to set it for the different sub-plants using modular concepts. A specially developed sequence programming language allows to program the sequences referring to logical names, as defined in configuration. The logical variables representing the global times that are stored in the real-time database of the FTU supervisory control system can be used in the sequence to relate it to the plasma discharge to be executed. The sequence programming language provides an abstraction level allowing the user to symbolically represent the actuation times of the different commands and the state verifications that can be linked in different ways.
During the plasma discharge preparatory phase the global time parameters are transferred to the FSC control system, which performs a compilation of the sequence generating the absolute times and the binary files representing the full sequence; these are then loaded and implemented by the FSC Hardware.
Co-authors
Carlo Neri
(ENEA CR Frascati, FRASCATI (ROME), Italy)
Chiara Monti
(ENEA CR Frascati, FRASCATI (ROME), Italy)
Cristina Centioli
(ENEA CR Frascati, FRASCATI (ROME), Italy)
Fabio Pollastrone
(ENEA CR Frascati, FRASCATI (ROME), Italy)
Maurizio Panella
(Consortium CREATE, Naples, Italy)
