The feedback control of fusion experiments in tokamak devices is entering a new area driven by the increase of control requirements for obtaining burning plasmas under safe operation conditions. A ...project aiming at setting up a flight simulator for the development of advanced controllers has recently started at CEA. This simulator reuses most of the components of the European integrated tokamak modelling (ITM) simulation platform. Thus, it benefits from the development made by the task force and it will be able to offer a development platform for the new controllers of present day European tokamaks and future machines. The paper will report on the different software developments performed in order to set up a flexible and user friendly design and test of feedback control loops.
The long pulse operation of the Tore Supra tokamak, with 4
min pulses obtained in 2002, has required improvements of the data acquisition and retrieval systems. Physicists need to have pressure ...trends between pulses, accurate calorimetric accounting, and continuous diagnostic monitoring. So, new functionalities have been added to our DAS to acquire, store, and access continuous values 24
h a day, 365 days a year. This paper reports the current status of the system and presents an overview of the solutions we used to implement these upgrades.
The Infrastructure and Software Integration Project must provide the hardware and software environment for the European integrated tokamak modelling taskforce to build and simulate a comprehensive ...fusion device. Several frameworks have been evaluated in 2006 and this paper reports on the current status of the gateway, the data communication system, the Web portal and the various ITM applications. The first version will be delivered in 2007, prefiguring the next decades’ tools.
Long duration discharges are planned for Tore Supra in the near future. A study has been made to detect and correct all the possible limitations of the data acquisition system. Results and analysis ...of a few 1000 s ‘dry-run’ test pulses are presented in this paper as well as the solutions foreseen for Tore Supra.
The Tore Supra tokamak has been upgraded to explore long duration plasma discharges up to 1000s. Since summer 2001, the acquisition system operates in continuous mode apart of the data processing ...which is still done after the pulse. In the first part, we explore a few solutions to process continuously the data during the pulse, based on parallel processing on a Linux farm and then on a CONDOR system. The second part is devoted to the Web service exposing the Tore Supra operation. In the last part, the VME acquisition system has been redesigned to keep up with the high data rates required by a few diagnostics. The workflow is now distributed among a few computers. At the end, we give the current status of the realisation and the future planning.
The European Integrated Tokamak Modelling Task Force (ITM-TF) is developing a new type of fully modular and flexible integrated tokamak simulator, which will allow a large variety of simulation ...types. This ambitious goal requires new concepts of data structure and workflow organisation, which are described for the first time in this paper. The backbone of the system is a physics- and workflow-oriented data structure which allows for the deployment of a fully modular and flexible workflow organisation. The data structure is designed to be generic for any tokamak device and can be used to address physics simulation results, experimental data (including description of subsystem hardware) and engineering issues.
Tore Supra continuous acquisition system Guillerminet, B.; Buravand, Y.; Le Luyer, M. ...
Fusion engineering and design,
06/2002, Letnik:
60, Številka:
3
Journal Article, Conference Proceeding
Recenzirano
As part of the request to run 1000 s plasma discharges in the near future at Tore Supra, a study was launched in late 1998 to identify the limitations of the present acquisition system with respect ...to long pulse operation. Since our initial study and proposal, new requirements have arisen which lead us not just to long duration but to continuous operation. In the first part of this paper, we recall the specific problems with long duration discharges and the new requests. In the second part, the solutions for continuous operation are described and finally, we present the Tore Supra implementation and outline the current status and planning.
The Tore supra data acquisition system has been completely re-engineered (Guillerminet et al., 1996, Proceedings of the 19th Symposium on Fusion Technology, Lisbonne, 1996) over the last few years as ...part of the long duration discharge programme, and has been in operation since autumn 1996. It is based on a commercial package which provides all the basic modules required to build a distributed on-line software system, integrating the parameter loading, control, data acquisition, and real-time data displays. In this paper we examine the whole system, analyse the requirements to achieve continuous operation and discuss the favoured solution for Tore supra.
In order to support the heat-load of a continuous high power plasma, the upgrade of the first wall of the TORE SUPRA tokamak is now in progress and the first pulses are expected by July 2001. The ...TORE SUPRA acquisition system, originally conceived for long pulse data acquisition and processing, needs some improvements to meet new requirements such as fast and continuous data access, real time data processing where possible, more efficient post-pulse data processing.
The Integrated Tokamak Modelling Task Force (ITM-TF) is developing an infrastructure where the validation needs, as being formulated in terms of multi-device data access and detailed physics ...comparisons aiming for inclusion of synthetic diagnostics in the simulation chain, are key components. As the activity and the modelling tools are aimed for general use, although focused on ITER plasmas, a device independent approach to data transport and a standardized approach to data management (data structures, naming, and access) is being developed in order to allow cross-validation between different fusion devices using a single toolset. Extensive work has already gone into, and is continuing to go into, the development of standardized descriptions of the data (Consistent Physical Objects). The longer term aim is a complete simulation platform which is expected to last and be extended in different ways for the coming 30 years. The technical underpinning is therefore of vital importance. In particular the platform needs to be extensible and open-ended to be able to take full advantage of not only today's most advanced technologies but also be able to marshal future developments.
As a full level comprehensive prediction of ITER physics rapidly becomes expensive in terms of computing resources, the simulation framework needs to be able to use both grid and HPC computing facilities. Hence data access and code coupling technologies are required to be available for a heterogeneous, possibly distributed, environment. The developments in this area are pursued in a separate project—EUFORIA (EU Fusion for ITER Applications) which is providing about 15 professional person year (ppy) per annum from 14 different institutes.
The range and size of the activity is not only technically challenging but is providing some unique management challenges in that a large and geographically distributed team (a truly pan-European set of researchers) need to be coordinated on a fairly detailed project level. The 2009 Work programme of ITM-TF organizes 240 individuals from 24 different associations providing about 60
ppy in total. Remote participation and collaborative tools and facilities as the ENEA sponsored Gateway have proven indispensible to meet this challenge.The current status of ITM-TF and EUFORIA is presented and discussed.
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