| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| MOPPC058 | Design, Development and Implementation of a Dependable Interlocking Prototype for the ITER Superconducting Magnet Powering System | interface, software, PLC, controls | 230 |
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| Based on the experience with an operational interlock system for the superconducting magnets of the LHC, CERN has developed a prototype for the ITER magnet central interlock system in collaboration with ITER. A total energy of more than 50 Giga Joules is stored in the magnet coils of the ITER Tokamak. Upon detection of a quench or other critical powering failures, the central interlock system must initiate the extraction of the energy to protect the superconducting magnets and, depending on the situation, request plasma disruption mitigations to protect against mechanical forces induced between the magnet coils and the plasma. To fulfil these tasks with the required high level of dependability the implemented interlock system is based on redundant PLC technology making use of hardwired interlock loops in 2-out-of-3 redundancy, providing the best balance between safety and availability. In order to allow for simple and unique connectivity of all client systems involved in the safety critical protection functions as well as for common remote diagnostics, a dedicated user interface box has been developed. | |||
TUCOAAB03 |
Approaching the Final Design of ITER Control System | controls, network, interface, operation | 490 |
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| The control system of ITER (CODAC) is subject to a final design review early 2014, with a second final design review covering high-level applications scheduled for 2015. The system architecture has been established and all plant systems required for first plasma have been identified. Interfaces are being detailed, which is a key activity to prepare for integration. A built to print design of the network infrastructure covering the full site is in place and installation is expected to start next year. The common software deployed in the local plant systems as well as the central system, called CODAC Core System and based on EPICS, has reached maturity providing most of the required functions. It is currently used by 55 organizations throughout the world involved in the development of plant systems and ITER controls. The first plant systems are expected to arrive on site in 2015 starting a five-year integration phase to prepare for first plasma operation. In this paper, we report on the progress made on ITER control system over the last two years and outline the plans and strategies allowing us to integrate hundreds of plant systems procured in-kind by the seven ITER members. | |||
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Slides TUCOAAB03 [5.294 MB] | ||
TUCOCA02 |
The ITER Interlock System | controls, interlocks, operation, neutral-beams | 910 |
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| ITER is formed by systems which shall be pushed to their performance limits in order to successfully achieve the scientific goals. The scientists in charge of exploiting the tokamak will require enough operational flexibility to explore as many plasma scenarios as possible while being sure that the integrity of the machine and safety of the environment and personnel are not compromised. The I&C Systems of ITER has been divided in three separate tiers: the conventional I&C, the safety system and the interlock system. This paper focuses on the latter. The design of the ITER interlocks has to take into account the intrinsic diversity of ITER systems, which implies a diversity of risks to be mitigated and hence the impossibility to implement a unique solution for the whole machine. This paper presents the chosen interlock solutions based on PLC, FPGA, and hardwired technologies. It also describes how experience from existing tokamaks has been applied to the design of the ITER interlocks, as well as the ITER particularities that have forced the designers to evaluate some technical choices which historically have been considered as non-suitable for implementing interlock functions. | |||
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Slides TUCOCA02 [3.303 MB] | ||
| FRCOBAB03 | The New Multicore Real-time Control System of the RFX-mod Experiment | controls, real-time, Linux, framework | 1493 |
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| The real-time control system of RFX-mod nuclear fusion experiment has been in operation since 2004 and has been used to control the plasma position and the MagnetoHydroDinamic (MHD) modes. Over time new and more computing demanding control algorithm shave been developed and the system has been pushed to its limits. Therefore a complete re-design has been carried out in 2012. The new system adopts radically different solutions in Hardware, Operating System and Software management. The VME PowerPc CPUs communicating over Ethernet used in the former system have been replaced by a single multicore server. The VxWorks Operating System , previously used in the VME CPUs has now been replaced by Linux MRG, that proved to behave very well in real-time applications. The previous framework for control and communication has been replaced by MARTe, a modern framework for real-time control gaining interest in the fusion community. Thanks to the MARTe organization, a rapid development of the control system has been possible. In particular, its intrinsic simulation ability of the framework gave us the possibility of carrying out most debugging in simulation, without affecting machine operation. | |||
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Slides FRCOBAB03 [1.301 MB] | ||