C. Taliercio

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We report on a set of performance measurements executed on VMEbus MVME5500 boards equipped with MPC7455 PowerPC processor, running four different operating systems: Wind River VxWorks, Linux, RTAI, and Xenomai. Some components of RTAI and Xenomai have been ported to the target architecture. Interrupt latency, rescheduling and inter-process communication(More)
The EPICS Channel Archiver is used to store data ex ported by EPICS I/O Controllers. The Channel Archiver acts as a Channel Access Client and stores recorded data, acquired via periodic scan or monitored, into indexed binary files. MDSplus is a data management system used in several Nuclear Fusion experiments to handle experimental and configuration data. A(More)
The paper describes the software architecture of the Real Time control system of the RFX-mod Nuclear Fusion experiment. Several units form a control network, in which data are exchanged during control. The system employs general-purpose processor boards, and uses isolated Ethernet for real time communication. The software is organized as a two-level(More)
A set of software metrics has been used to provide empirical evidence on how code organization changes when a software product evolves. A Java application for graphical data display used in experimental physics has been used as a test case. Exploiting common patterns in the way software applications evolve is desirable as it would give designers and(More)
Stable operation with control on magnetohydrodynamic modes has been obtained in the modified reversed field experiment employing a set of 192 feedback controlled saddle coils. Improvements of plasma temperature, confinement (twofold), and pulse length (threefold) and, as a consequence of the magnetic fluctuation reduction, strong mitigation of plasma-wall(More)
Optimization of machine operation, including plasma position control, density control and especially feedback control on multiple magnetohydrodynamic modes, has led RFX-mod to operate reliably at 1.5 MA, the highest current ever achieved on a reversed field pinch (RFP). At high current and low density the magnetic topology spontaneously self-organizes in an(More)
A system of electrostatic sensors has been designed for the SPIDER (Source for the production of Ions of Deuterium Extracted from RF plasma) experiment, prototype RF source of the ITER NBI (neutral beam injection). A prototype of the sensor system was manufactured and tested at the BATMAN (BAvarian Test MAchine for Negative ions) facility, where the plasma(More)
For ITER heating and current drive, two neutral beam injectors (NBIs) are planned, delivering a total of 33 MW in stationary conditions up to one hour; each injector will accelerate a 40 A D current up to 1 MV. Such requirements have never been achieved simultaneously. Hence the PRIMA (Padova Research on ITER Megavolt Accelerator) facility is under(More)
The paper discusses the requirements and presents an architectural overview of a new general-purpose framework for real-time control, currently under development at the RFX laboratory. This represents the third generation of control framework developed at RFX. It takes into account the experience gained in the development of the previous frameworks and(More)
SPIDER, the full-size prototype of the ITER heating neutral beams (HNBs) radio frequency (RF) ion source, has been designed and is under construction at Consorzio RFX in Padua, Italy. Several thermocouples will be installed in both SPIDER and HNB source to characterize and monitor the possibly severe thermal load on mechanical components. The presence of(More)