D. Carnevale
A5083999378- Magnetic confinement fusion research
- Adaptive Control of Nonlinear Systems
- Particle accelerators and beam dynamics
- Advanced Control Systems Optimization
- Stability and Control of Uncertain Systems
- Fusion materials and technologies
- Fault Detection and Control Systems
- Control Systems and Identification
- Plasma Diagnostics and Applications
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Target Tracking and Data Fusion in Sensor Networks
- Extremum Seeking Control Systems
- Stability and Controllability of Differential Equations
- Laser-Plasma Interactions and Diagnostics
- Robotics and Sensor-Based Localization
- Control and Stability of Dynamical Systems
- Piezoelectric Actuators and Control
- Iterative Learning Control Systems
- Magnetic Properties and Applications
- Distributed Control Multi-Agent Systems
- Nuclear reactor physics and engineering
- Advanced Vision and Imaging
- Dynamics and Control of Mechanical Systems
- Combustion and flame dynamics
University of Rome Tor Vergata
2016-2025
National Agency for New Technologies, Energy and Sustainable Economic Development
2022
National Centre for Nuclear Research
2021
Institute of Ionized Gas
2019
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2019
Universidad Carlos III de Madrid
2019
Institute of Plasma Physics
2019
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2008
Sapienza University of Rome
2006-2008
Simple Lyapunov proofs are given for an improved (relative to previous results that have appeared in the literature) bound on maximum allowable transfer interval guarantee global asymptotic or exponential stability networked control systems and also semiglobal practical with respect length of
The purpose of this note is to apply recent results on stabilization networked control systems obtain an explicit formula for the maximum allowable sampling period (MASP) that guarantees stability a nonlinear sampled-data system with emulated controller. Such formulas are great value practitioners.
Abstract The tokamak à configuration variable (TCV) continues to leverage its unique shaping capabilities, flexible heating systems and modern control system address critical issues in preparation for ITER a fusion power plant. For the 2019–20 campaign configurational flexibility has been enhanced with installation of removable divertor gas baffles, diagnostic capabilities an extensive set upgrades new dual frequency gyrotrons. baffles reduce coupling between main chamber allow detailed...
The problem of constructing globally convergent, reduced-order observers for general nonlinear systems is addressed. It shown that an asymptotic estimate the unknown states can be obtained by rendering attractive appropriately selected (invariant) manifold in extended state space. Current results on observer design require nonlinearities appearing system equations are either linear functions unmeasured or monotonic a combination states. In this paper we relax these two assumptions allowing...
Abstract A series of experiments have been executed at JET to assess the efficacy newly installed shattered pellet injection (SPI) system in mitigating effects disruptions. Issues, important for ITER disruption mitigation system, such as thermal load mitigation, avoidance runaway electron (RE) formation, radiation asymmetries during quench electromagnetic control and RE energy dissipation addressed over a large parameter range. The efficiency has examined various SPI strategies. paper...
The problem of output regulation for a class hybrid linear systems characterized by periodic jumps is considered in this paper. Necessary and sufficient conditions its solution are provided both the full information error feedback case. By detailed analysis such conditions, several interesting properties derived, including fact that regulator must contain (suitably defined) copy flow zero dynamics plant addition to usual exosystem dynamics, generically solvable fat plants (having more inputs...
Abstract The research program of the TCV tokamak ranges from conventional to advanced-tokamak scenarios and alternative divertor configurations, exploratory plasmas driven by theoretical insight, exploiting device’s unique shaping capabilities. Disruption avoidance real-time locked mode prevention or unlocking with electron-cyclotron resonance heating (ECRH) was thoroughly documented, using magnetic radiation triggers. Runaway generation high- Z noble-gas injection runaway dissipation...
Relativistic electron (RE) beams at high current density (low safety factor, qa) yet very low free-electron accessed with D2 secondary injection in the DIII-D and JET tokamak are found to exhibit large-scale MHD instabilities that benignly terminate RE beam. In JET, this technique has enabled termination of MA-level currents without measurable first-wall heating. This scenario thus offers an unexpected alternate pathway achieve mitigation collisional dissipation. Benign is explained by two...
In this paper the problem of generating zero error steady-state responses is addressed for a class hybrid linear systems whose jumps are determined by time only. The procedure design an automatic device response and input described. Once such compensator ensuring incremental stability (see companion paper) available, classical output regulation same can be immediately solved. Compared with previously available results, no assumption needed on plant about minimum phaseness, relative degree or...
This paper reports some stabilization results for a class of hybrid linear systems whose jumps are determined by time only. Linearity the resulting closed-loop system implies that global asymptotic and incremental stability achieved at same time. In turn, allows solution recently considered output regulation problem coupling suitable steady state generator (described in companion paper) stabilizer from this paper. It is remarked general MIMO plants without relying on minimum phase, relative...
In this paper, the problem of output regulation for a class hybrid linear systems is considered. Necessary and sufficient conditions its solution are provided, both in full information error feedback case, under additional constraint that regulator time invariant system from same class. A stronger version internal model principle also shown, requiring must contain copy zero dynamics plant addition to usual exosystem dynamics.
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...
Disruption-generated runaway electron (RE) beams represent a severe threat for tokamak plasma-facing components in high current devices like ITER, thus motivating the search of mitigation techniques. The application 3D fields might aid this purpose and recently was investigated also ASDEX Upgrade experiment by using internal active saddle coils (termed B-coils). Resonant magnetic perturbations (RMPs) with dominant toroidal mode number n = 1 have been applied B-coils, RE specific scenario,...
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 role of the COMPASS tokamak in research generation, confinement and losses runaway electron (RE) population is presented. Recently, two major groups experiments aimed at improved understanding control REs have been pursued. First, effects massive gas injection ( Ar/Ne particles) impurity seeding were studied systematically. observed phenomena include generation post-disruption RE beam current conversion from plasma to RE. Zero loop voltage was implemented order study decay simplified...
Abstract Runaway electrons (REs) created during tokamak disruptions pose a threat to the reliable operation of future larger machines. Experiments using shattered pellet injection (SPI) have been carried out at JET investigate ways prevent their generation or suppress them if avoidance is not sufficient. Avoidance possible SPI contains sufficiently low fraction high-Z material, it fired early in advance disruption prone runaway generation. These results are consistent with previous similar...
Simple Lyapunov proofs are given for an improved (relative to previous results that have appeared in the literature) bound on maximum allowable transfer interval guarantee global asymptotic or exponential stability networked control systems and also semiglobal practical with respect length of interval. We apply our emulation nonlinear controllers sampled-data systems.
In this paper, the problem of linear time invariant state feedback stabilization for a class hybrid systems is dealt with. The considered has received considerable attention in last years especially as benchmark output regulation, and context it turns out to be quite crucial have approaches working under minimal hypotheses meanwhile providing solutions. After showing that static stabilizers might not exist even simple setting, new solution provided by formulating solving quadratic optimal...
A complete procedure for the design of a robust output feedback regulator is proposed class uncertain linear hybrid systems with periodic jumps, using extension classical internal model principle. Simple conditions, testable on plant nominal data, problem solvability are given. The not restricted to be minimum phase, square, or single input output. has key feature containing an composed by two main units, flow model, in charge providing correct achieve regulation during flows, and jump...
Radiofrequency emission in the 0.4–3 GHz range from FTU tokamak presence of runaway electrons (REs) has been measured various plasma regimes. Rapid bursts associated with enhanced RE pitch-angle scattering reveal kinetic instabilities affecting evolution population buildup phase. Such measurements also provide a sensitive monitor for during early formation. The leading edge radio is much shorter than interleaving periods low emission; spectral broadening growth indicates nonlinear wave...