Real-time plasma control at JET using an ATM network

Felton, R.; Blackler, K.; Dorling, S.; Goodyear, A.; Hemming, O.; Knight, P.; Lennholm, M.; Milani, F.; Sartori, F.; Young, I.

doi:10.1109/rtcon.1999.842597

Cited by 23 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At that time ad-hoc solutions, typically using DSP processors have been developed [7][8][9]. In this case no OS was used and the application consisted of a bare program taking data and computing output references in a loop.…”

Section: Linux For Real-time Applicationsmentioning

confidence: 99%

From distributed to multicore architecture in the RFX-mod real time control system

Manduchi

Luchetta

Soppelsa

et al. 2014

Fusion Engineering and Design

View full text Add to dashboard Cite

Section: Linux For Real-time Applicationsmentioning

confidence: 99%

From distributed to multicore architecture in the RFX-mod real time control system

Manduchi

Luchetta

Soppelsa

et al. 2014

Fusion Engineering and Design

View full text Add to dashboard Cite

“…At the very core of this maze of real-time nodes is the Asynchronous Transfer Mode (ATM) based Real-Time Data Network (RTDN) [10]. It provides the communication infrastructure that enables cooperation amongst all real-time systems.…”

Section: The Jet's Real-time Infrastructurementioning

confidence: 99%

A New Generation of Real-Time Systems in the JET Tokamak

Alves¹,

Neto²,

Valcárcel³

et al. 2014

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

Abstract-Recently a new recipe for developing and deploying real-time systems has become increasingly adopted in the JET tokamak. Powered by the advent of x86 multi-core technology and the reliability of the JET's well established Real-Time Data Network (RTDN) to handle all real-time I/O, an official Linux vanilla kernel has been demonstrated to be able to provide realtime performance to user-space applications that are required to meet stringent timing constraints. In particular, a careful rearrangement of the Interrupt ReQuests' (IRQs) affinities together with the kernel's CPU isolation mechanism allows to obtain either soft or hard real-time behavior depending on the synchronization mechanism adopted. Finally, the Multithreaded Application Real-Time executor (MARTe) framework is used for building applications particularly optimised for exploring multicore architectures. In the past year, four new systems based on this philosophy have been installed and are now part of the JET's routine operation. The focus of the present work is on the configuration and interconnection of the ingredients that enable these new systems' real-time capability and on the impact that JET's distributed real-time architecture has on system engineering requirements, such as algorithm testing and plant commissioning. Details are given about the common real-time configuration and development path of these systems, followed by a brief description of each system together with results regarding their real-time performance. A cycle time jitter analysis of a user-space MARTe based application synchronising over a network is also presented. The goal is to compare its deterministic performance while running on a vanilla and on a Messaging Real time Grid (MRG) Linux kernel.

show abstract

“…Many of the ITER requirements for the active feedback control of shaped and vertically unstable elongated plasmas stem from solutions already implemented on operating tokamaks such as: JET [1], JT-60U [2], D-IIID [3], ASDEX-U [4], TCV [5]. Moreover, feedback control of RF auxiliary power to stabilize MHD modes has been already explored in many tokamak experiments such as: ASDEX-U [6], FTU [7].…”

Section: Introductionmentioning

confidence: 99%