A5035977363- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Fusion materials and technologies
- CCD and CMOS Imaging Sensors
- Ionosphere and magnetosphere dynamics
- Diamond and Carbon-based Materials Research
- Radiation Effects in Electronics
- Particle physics theoretical and experimental studies
- Particle Accelerators and Free-Electron Lasers
- Electron and X-Ray Spectroscopy Techniques
- Ion-surface interactions and analysis
- Vacuum and Plasma Arcs
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Metal and Thin Film Mechanics
- Radioactive contamination and transfer
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Materials and Properties
National Agency for New Technologies, Energy and Sustainable Economic Development
2021-2025
Institute for the Science and Technology of Plasmas
2019-2024
University of Milano-Bicocca
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2014-2024
European Organization for Nuclear Research
2007-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2019-2024
Culham Centre for Fusion Energy
2024
Culham Science Centre
2013-2024
National Centre for Nuclear Research
2023
National Research Council
2020-2022
Abstract The most efficient and promising operational regime for the International Thermonuclear Experimental Reactor tokamak is high-confinement mode. In this regime, however, periodic relaxations of plasma edge can occur. These edge-localized modes pose a threat to integrity fusion device. Here we reveal strong impact energetic ions on spatio-temporal structure in tokamaks using nonlinear hybrid kinetic–magnetohydrodynamic simulations. A resonant interaction between fast at electromagnetic...
The ITER project requires additional heating by two neutral beam injectors, each accelerating to 1 MV a 40 A of negative deuterium ions, deliver the plasma power about 17 MW for one hour. As these requirements have never been experimentally met, it was recognized as necessary setup test facility, PRIMA (Padova Research on Megavolt Accelerator), in Italy, including full-size ion source, SPIDER, and prototype whole injector, MITICA, aiming develop injectors be installed ITER. This realization...
First simultaneous measurements of deuterium-deuterium (DD) and deuterium-tritium neutrons from deuterium plasmas using a Single crystal Diamond Detector are presented in this paper. The were performed at JET with dedicated electronic chain that combined high count rate capabilities energy resolution. deposited spectrum DD was successfully reproduced by means Monte Carlo calculations the detector response function simulations neutron emission plasma, including background contributions....
At present, magnetic confinement fusion devices rely solely on absolute neutron counting as a direct way of measuring power. Absolute deuterium-tritium gamma rays could provide the secondary neutron-independent technique required for validation scientific results and licensing tool future power plants. However, this approach necessitates an accurate determination gamma-ray-to-neutron branching ratio. The ratio reaction ^{3}H(^{2}H,γ)^{5}He/^{3}H(^{2}H,n)^{4}He was determined in plasmas at...
The ITER heating neutral beam (HNB) injector, based on negative ions accelerated at 1 MV, will be tested and optimized in the SPIDER source MITICA full injector prototypes, using a set of diagnostics not available HNB. RF source, where H−/D− production is enhanced by cesium evaporation, monitored with thermocouples, electrostatic probes, optical emission spectroscopy, cavity ring down, laser absorption spectroscopy. analyzed cooling water calorimetry, short pulse instrumented calorimeter,...
Single crystal Diamond Detectors (SDD) are being increasingly exploited for neutron diagnostics in high power fusion devices, given their significant radiation hardness and energy resolution capabilities. The geometrical efficiency of SDDs is limited by the size commercially available crystals, which often smaller than dimension beams along collimated lines sight tokamak devices. In this work, we present design fabrication a 14 MeV spectrometer consisting 12 diamond pixels arranged matrix,...
We here present the principles and main physics capabilities behind design of radial gamma ray spectrometers (RGRS) system for alpha particle runaway electron measurements at ITER. The diagnostic benefits from recent advances in gamma-ray spectrometry tokamak plasmas combines space high energy resolution a single device. RGRS as designed can provide information on particles time scale 1/10 slowing down ITER 500 MW full power DT scenario. Spectral observations 3.21 4.44 MeV peaks reaction...
SPIDER is one of the two projects ITER Neutral Beam Test Facility (NBTF) under construction in Padova, Italy, at Consorzio RFX premises; it will have a 100 keV beam source with full-size prototype radiofrequency (RF) ion for Injector (NBI), designed to operate pulse length up 3600 s, featuring ITER-like filter field configuration, caesium oven layout and wide set diagnostics.These features allow reproducing operation like as cannot be done any other existing test facility.SPIDER realization...
An overview of the recent operations and main results cesium injection in Source for Production Ions Deuterium Extracted from Rf plasma (SPIDER) negative ion source are described this contribution. In experiments without injection, all SPIDER plants were tested to verify basic expectations on operational parameters (e.g., electron cooling effectiveness magnetic filter field) determine its region. For beam properties, it was shown that current density varies across vertical direction....
Abstract Experiments on ASDEX Upgrade (AUG) in 2021 and 2022 have addressed a number of critical issues for ITER EU DEMO. A major objective the AUG programme is to shed light underlying physics confinement, stability, plasma exhaust order allow reliable extrapolation results obtained present day machines these reactor-grade devices. Concerning pedestal physics, mitigation edge localised modes (ELMs) using resonant magnetic perturbations (RMPs) was found be consistent with reduction linear...
The Alfvén instability nonlinearly excited the energetic-particle-driven geodesic acoustic mode on ASDEX-Upgrade tokamak, as demonstrated experimentally. mechanism of excitation and nonlinear evolution is not yet fully understood. In present work, a first-principles simulation using MEGA code investigated properties in both linear growth saturated phases. Here we show that successfully reproduced coexistence these two modes, agreed with experimental results well. Conclusive evidence showed...
Abstract On the basis of several recent breakthroughs in fusion research, many activities have been launched around world to develop power plants on fastest possible time scale. In this context, high-fidelity simulations plasma behavior large supercomputers provide one main pathways accelerating progress by guiding crucial design decisions. When it comes determining energy confinement a magnetic device, which is key quantity interest, gyrokinetic turbulence are considered approach choice –...
The development of a large size gaseous detector single photons, able to stably operate at high gain and rate, provide good time resolution insensitivity magnetic field would be beneficial future Cherenkov Imaging Counters.The could based on the use multilayer architecture THGEM electron multipliers coupled solid state CsI photocathode.A systematic study response THGEM-based counters versus geometrical
Abstract The ASDEX Upgrade (AUG) programme, jointly run with the EUROfusion MST1 task force, continues to significantly enhance physics base of ITER and DEMO. Here, full tungsten wall is a key asset for extrapolating future devices. high overall heating power, flexible mix comprehensive diagnostic set allows studies ranging from mimicking scrape-off-layer divertor conditions DEMO at density fully non-inductive operation ( q 95 = 5.5, ) low density. Higher installed electron cyclotron...
Single-crystal Diamond Detectors (SDDs), due to their high radiation hardness, fast response time and small size, are good candidates as neutron detectors in those environments where the flux is an issue, such spallation sources next generation thermonuclear fusion plasmas, i.e. ITER experiment. Neutron detection SDDs based on collection of electron-hole pairs produced by charged particles generated interactions with 12C. Recent measurements have demonstrated SDD capability measuring a...
A fast neutron beam monitor based on a triple Gas Electron Multiplier (GEM) detector was developed and tested for the ISIS spallation source in U.K. The test performed at VESUVIO line operating ISIS. 2D footprint recorded real time with spatial resolution of few millimeters thanks to patterned readout.
Gamma-ray spectroscopy measurements at MHz counting rates have been carried out, for the first time, with a compact spectrometer based on LaBr3 scintillator and silicon photomultipliers. The instrument, which is also insensitive to magnetic fields, has developed in view of upgrade gamma-ray camera diagnostic α particle deuterium-tritium plasmas Joint European Torus. Spectra were measured up 2.9 projected energy resolution 3%-4% 3-5 MeV range, interest fast ion physics studies fusion plasmas....
Abstract An overview of recent results obtained at the tokamak ASDEX Upgrade (AUG) is given. A work flow for predictive profile modelling AUG discharges was established which able to reproduce experimental H-mode plasma profiles based on engineering parameters only. In center, theoretical predictions current redistribution by a dynamo effect were confirmed experimentally. For core transport, stabilizing fast ion distributions turbulent transport shown be important explain isotope and...