L. Boncagni
A5015207311- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Fusion materials and technologies
- Ionosphere and magnetosphere dynamics
- Plasma Diagnostics and Applications
- Atomic and Subatomic Physics Research
- Laser-Plasma Interactions and Diagnostics
- Nuclear reactor physics and engineering
- Advanced Data Storage Technologies
- Distributed and Parallel Computing Systems
- Network Time Synchronization Technologies
- Real-Time Systems Scheduling
- Real-time simulation and control systems
- Stability and Controllability of Differential Equations
- Petri Nets in System Modeling
- Laser-induced spectroscopy and plasma
- Parallel Computing and Optimization Techniques
- Solar and Space Plasma Dynamics
- Advanced Vision and Imaging
- Environmental Monitoring and Data Management
- Plasma and Flow Control in Aerodynamics
- Stability and Control of Uncertain Systems
- Iterative Learning Control Systems
- Teleoperation and Haptic Systems
National Agency for New Technologies, Energy and Sustainable Economic Development
2014-2025
ENEA Frascati Research Centre
2010
Culham Centre for Fusion Energy
2010
University of Rome Tor Vergata
2009
We present an overview of FTU experiments on runaway electron (RE) generation and control carried out through a comprehensive set real-time (RT) diagnostics/control systems newly installed RE diagnostics. An imaging spectrometer system detects visible infrared synchrotron radiation. A Cherenkov probe measures escaping the plasma. gamma camera provides hard x-ray radial profiles from bremsstrahlung interactions in Experiments onset suppression show that threshold electric field for is larger...
Since the 2012 IAEA-FEC Conference, FTU operations have been largely devoted to runaway electrons generation and control, exploitation of 140 GHz electron cyclotron (EC) system liquid metal limiter elements. Experiments on shown that measured threshold electric field for their is larger than predicted by collisional theory can be justified considering synchrotron radiation losses. A new control algorithm was developed tested in presence a current plateau, allowing minimize interactions with...
Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle role plasma fueling shape for onset small ELM regimes. On both devices, regimes with high confinement are achieved if only two conditions fulfilled at same time. Firstly, density separatrix must be large enough (), leading pressure profile flattening separatrix, which stabilizes type-I ELMs. Secondly, magnetic configuration close double null (DN), reduction shear in...
Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat particle loads on wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research ASDEX Upgrade (AUG), MAST TCV. This multi-machine approach within EU-MST, covering wide parameter range, instrumental progress in field, as ITER DEMO core/pedestal SOL parameters are not achievable simultaneously present day devices. A two prong adopted. On one...
The Multithreaded Application Real-Time executor (MARTe) is a data driven framework environment for the development and deployment of real-time control algorithms. main ideas which led to present version were standardize systems, while providing set strictly bounded standard interfaces outside world also accommodating collection facilities promote speed ease development, commissioning such systems. At core every MARTe based application, independent inter-communicating software blocks, named...
Post-disruption runaway electron (RE) beams in tokamaks with large current can cause deep melting of the vessel and are one major concerns for ITER operations. Consequently, a considerable effort is provided by scientific community order to test RE mitigation strategies. We present an overview results obtained at FTU TCV controlling position improve safety repeatability studies such as massive gas (MGI) shattered pellet injections (SPI). show that proposed beam controller (REB-C) implemented...
Recently, a new recipe for developing and deploying real-time systems has become increasingly adopted in the JET tokamak. Powered by advent of x86 multi-core technology reliability JET's well established Real-Time Data Network (RTDN) to handle all I/O, an official Linux vanilla kernel been demonstrated be able provide performance user-space applications that are required meet stringent timing constraints. In particular, careful rearrangement Interrupt ReQuests' (IRQs) affinities together...
The biorthogonal decomposition analysis of signals from an array Mirnov coils is able to provide the spatial structure and temporal evolution magnetohydrodynamic (MHD) instabilities in a tokamak. Such can be adapted data acquisition elaboration system suitable for fast real time applications such as instability detection disruption precursory markers computation. This paper deals with description this technique applied Frascati Tokamak Upgrade (FTU).
One of the main problems in tokamak fusion devices concerns capability to operate at a high plasma density, which is observed be limited by appearance catastrophic events causing loss confinement. The commonly used empirical scaling law for density limit Greenwald limit, predicting that maximum achievable line-averaged along central chord depends only on average current density. However, has been exceeded experiments case peaked profiles, indicating edge real parameter responsible limit....
In this paper we employ and extend the dynamic allocation theory first presented in a recent work by last author, L. Zuccarian, to guarantee asymptotic tracking of prescribed elongation plasma cross section Frascati Tokamak Upgrade (FTU). This task is hard accomplish because it can only be achieved using so-called poloidal coil, high bandwidth actuator needed perform performance horizontal position regulation. Another actuator, could used for positioning task, but its insufficient. Using...
Model-driven design is recently gaining a wide spreading in different fields, such as of mechatronics and embedded systems. Approaches based on either UML or SysML permit to efficiently manage the complex systems areas. In this paper modeling approach proposed for real-time applications MARTe framework. The framework has been adopted development several European experimental fusion reactors. allows achieve better standardization cycle documentation developed Furthermore, by using...
The Fusion Advanced Studies Torus (FAST) experiment is being proposed by the Italian laboratories as a European satellite Tokamak that will enhance and facilitate exploitation of ITER like scenarios technologies. Its size complexity comparable to largest fusion machine in world: JET. As such, its real time control system have meet basic requirements such modular distributed architecture, where different subsystems can be easily integrated at times operate either independently or cooperation...
Plasma properties can be useful in a wide spectrum of applications. Experimental projects on controlled nuclear fusion are the most challenging these applications and, at same time, best way to approach plasma science. Since reactors ensure large-scale, safe, environmentally-friendly and virtually inexhaustible source energy, several fusion-oriented megaprojects innovative companies appearing all over world. PROTO-SPHERA (Spherical for HElicity Relaxation Assessment) is first project with...
Abstract Tokamak à configuration variable (TCV), recently celebrating 30 years of near-continual operation, continues in its missions to advance outstanding key physics and operational scenario issues for ITER the design future power plants such as DEMO. The main machine heating systems changes are first described. Then follow five sections: plasma scenarios. Base-Line (IBL) discharges, triangularity studies together with X3 N2 seeding. Edge localised mode suppression, a high radiation...
Abstract Since the 2016 IAEA Fusion Energy Conference, FTU operations have been mainly devoted to experiments on runaway electrons and investigations into a tin liquid limiter; other involved studies of elongated plasmas dust. The tearing mode onset in high density regime has studied by means linear resistive code MARS, highly collisional regimes investigated. New diagnostics, such as electron imaging spectroscopy system for in-flight triple Cherenkov probe measurement escaping electrons,...
New FTU ohmic discharges with a liquid lithium limiter at I P = 0.7–0.75 MA, B T 7 and n e0 ⩾ 5 × 10 20 m −3 confirm the spontaneous transition to an enhanced confinement regime, 1.3–1.4 times ITER-97-L, when density peaking factor is above threshold value of 1.7–1.8. The improved derives from reduction electron thermal conductivity (χ e ) as increases, while ion i remains close neoclassical values. Linear microstability reveals importance in triggering turbulent inward flux for electrons...
Abstract Since the 2018 IAEA FEC Conference, FTU operations have been devoted to several experiments covering a large range of topics, from investigation behaviour liquid tin limiter runaway electrons mitigation and control stabilization tearing modes by electron cyclotron heating pellet injection. Other involved spectroscopy heavy metal ions, density peaking in helium doped plasmas, assisted start-up temperature measurements high plasmas. The effectiveness laser induced breakdown system has...
The capability of predicting the density limit a magnetically confined burning plasma is crucial importance to establish ultimate performance fusion power plant. Greenwald limit, commonly used as an empirical scaling law, predicts that maximum achievable central line-averaged given by relation , where average current and k elongation. However, several experiments have pointed out such can be overcome in presence peaked profiles. This paper proposes new law for limiter tokamak operating...