M. Barbisan
A5039078062- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Fusion materials and technologies
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Electrostatic Discharge in Electronics
- Laser-Plasma Interactions and Diagnostics
- Cryptographic Implementations and Security
- Ion-surface interactions and analysis
- Gyrotron and Vacuum Electronics Research
- High voltage insulation and dielectric phenomena
- Radiation Effects in Electronics
- Bluetooth and Wireless Communication Technologies
- Nuclear reactor physics and engineering
- Ionosphere and magnetosphere dynamics
- Laser-induced spectroscopy and plasma
- Advanced Sensor Technologies Research
- Electron and X-Ray Spectroscopy Techniques
- Scientific Measurement and Uncertainty Evaluation
- Ultrasonics and Acoustic Wave Propagation
National Agency for New Technologies, Energy and Sustainable Economic Development
2015-2024
University of Padua
2015-2024
École Polytechnique Fédérale de Lausanne
2023
Innova (Italy)
2020
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
2013-2019
National Institutes for Quantum Science and Technology
2017
University of Liverpool
2017
Institute of Market Economy, Social Policy and Law
2013-2015
Istituto Nazionale di Fisica Nucleare
2015
University of Milan
2013
The ITER Neutral Beam Test Facility (NBTF), called PRIMA (Padova Research on Megavolt Accelerator), is hosted in Padova, Italy and includes two experiments: MITICA, the full-scale prototype of heating neutral beam injector, SPIDER, full-size radio frequency negative-ions source. NBTF realization exploitation SPIDER MITICA have been recognized as necessary to make future operation injectors efficient reliable, fundamental achievement thermonuclear-relevant plasma parameters ITER. This paper...
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...
Abstract The negative-ion based neutral beam injector for heating and current drive of the ITER plasma (ITER HNB) is under development, at present focusing on optimization full-scale source in SPIDER test stand. production H − or D ions ion low work function surfaces obtained by caesium evaporation. This paper describes conditioning procedure corresponding performances during first operation with caesium. Technical solutions to overcome limitations stand are described. influence parameters...
The European DEMO is a pulsed device with pulse length of 2 hours. functions devoted to the heating and current drive system are: plasma breakdown, ramp-up flat-top where fusion reactions occur, control during phase, finally ramp-down. EU-DEMO project was in Pre-Concept Design Phase 2014-2020, meaning that some cases, design values precise requirements from physics point view were not yet frozen. A total 130 MW considered for all phases plasma: flat top, 30 required neoclassical tearing...
Heating neutral beam (HNB) injectors, necessary to achieve burning conditions and control plasma instabilities in ITER, are characterized by such demanding parameters that a test facility (NBTF) dedicated their development optimization is being realized Padua (Italy) with direct contributions from the Italian government (through Consorzio RFX as host entity) ITER international organization (with kind domestic agencies of Europe, Japan India) technical scientific support various European...
The requirements of ITER neutral beam injectors (1 MeV, 40 A negative deuterium ion current for 1 h) have never been simultaneously attained; therefore, a dedicated Neutral Beam Test Facility (NBTF) was set up at Consorzio RFX (Padova, Italy). NBTF includes two experiments: SPIDER (Source the Production Ions Deuterium Extracted from Rf plasma), full-scale prototype source injectors, with 100 keV accelerator, to investigate and optimize properties source; MITICA, entire injector, devoted...
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...
Giant negative ion sources for neutral beam injectors deliver huge currents, thanks to their multi-beamlet configuration. As the single-beamlet optics defines transmission losses along beamline, extraction of a similar current all beamlets is extremely desirable, in order facilitate source operation (i.e., around perveance match). This Review investigates correlation between vertical profile intensity and profiles plasma properties at region source, focusing on influence increasing cesium...
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....
Neutral beam injection is one of the most important methods plasma heating in thermonuclear fusion experiments, allowing attainment conditions as well driving current. beams are generally produced by electrostatically accelerating ions, which neutralised before into magnetised plasma. At particle energy required for advanced devices and particularly ITER, neutralisation positive ions very inefficient so that negative used. The present paper devoted to description phenomena occurring when a...
Neutral Beam Injectors (NBIs), which need to be strongly optimized in the perspective of DEMO reactor, request a thorough understanding negative ion source used and multi-beamlet optics. A relatively compact radio frequency (rf) source, named NIO1 (Negative Ion Optimization 1), with 9 beam apertures for total H− current 130 mA, 60 kV acceleration voltage, was installed at Consorzio RFX, including high voltage deck an X-ray shield, provide test bench optimizations activities support ITER NBI...
This paper reports the main recent results of RFX-mod fusion science activity.The device is characterized by a unique flexibility in terms accessible magnetic configurations.Axisymmetric and helically shaped Reversed-field pinch equilibria have been studied, along with tokamak plasmas wide range q(a) regimes (spanning from 4 down to 1.2 values).The full configurations between two, so-called ultra low-q ones, has explored, aim studying specific physical issues common all equilibria, such as,...
The ITER project requires additional heating provided by two neutral beam injectors using 40 A negative deuterium ions accelerated at 1 MV. As the requirements have never been experimentally met, a test facility is under construction Consorzio RFX, which hosts experiments: SPIDER, full-size 100 kV ion source prototype, and MITICA, MeV injector prototype. Since diagnostics in will be mainly limited to thermocouples, due neutron gamma radiation access, it crucial thoroughly investigate...
Optical Emission Spectroscopy (OES) on the SPIDER negative ion source has been collecting data since beginning of operation in Summer 2018. The first few months were devoted to complete diagnostic commissioning and its integration with control acquisition system. Consistent sets spectroscopic have acquired under different experimental conditions, not only varying plasma filling pressure injected power but also changing RF generator frequencies strength magnetic field acting as a filter front...
A facility will be built in Padova (Italy) to develop, commission, and optimize the neutral beam injection system for ITER. The full scale prototype negative ion radio frequency source SPIDER, featuring up 100 kV acceleration voltage, includes a set of diagnostics, required safe operation measure performance. Among them, emission spectroscopy (BES) used line integrated uniformity, divergence, neutralization losses inside accelerator (stripping losses). In absence stage, SPIDER is mainly...
The RFX-mod device is operated both as a reversed field pinch (RFP), where advanced regimes featuring helical shape develop, and tokamak. Due to its flexibility, contributing the solution of key issues in roadmap ITER DEMO, including MHD instability control, internal transport barriers, edge turbulence, isotopic effect, high density limit three-dimensional (3D) non-linear modelling. This paper reports recent advancements understanding self-organized states, strong electron barrier, RFP...
Cavity Ring Down Spectroscopy (CRDS) is used to measure the D− absolute density produced in helicon plasma reactor RAID (Resonant Antenna Ion Device) at Swiss Plasma Center. The birdcage geometry of antenna produces a homogeneous, high-density column (ne ≅ 1.5 × 1018 m−3 H2 and D2 0.3 Pa 3 kW input power) 1.4 m long. We present CRDS experimental setup, its positioning on reactor, how mechanical thermal effects affect measurement. First results deuterium confirm production negative ions (D−)...
Neutral beam injection (NBI) systems are required for heating and current drive in the next generation fusion experiment ITER, strict requirements placed on beamlet core divergence (<7 mrad) transmission into tokamak. The measurement of single is challenging due to multi-beamlet nature negative ion sources that such systems; diagnostic compatible with large high power beams can only provide spatially averaged measurements, leading mixing signals within results. To improve...