M. Cavenago
A5045840778- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Electrostatic Discharge in Electronics
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Laser-induced spectroscopy and plasma
- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Electron and X-Ray Spectroscopy Techniques
- Dust and Plasma Wave Phenomena
- Fusion materials and technologies
- Metal and Thin Film Mechanics
- Ion-surface interactions and analysis
- Ionosphere and magnetosphere dynamics
- Organ Transplantation Techniques and Outcomes
- Vacuum and Plasma Arcs
- Non-Destructive Testing Techniques
- Crystallography and Radiation Phenomena
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
2015-2024
Istituto Nazionale di Fisica Nucleare
2006-2024
University of Rome Tor Vergata
2024
University of Padua
2015-2022
National Agency for New Technologies, Energy and Sustainable Economic Development
2009-2021
University of Milan
2010-2017
Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico
2015-2017
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015
Institute of Market Economy, Social Policy and Law
2013-2015
Politecnico di Milano
2010
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 ITER Neutral Beam Test Facility (PRIMA) is presently under construction at Consorzio RFX (Padova, Italy). PRIMA includes two experimental devices: an ITER-size ion source with low voltage extraction, called SPIDER, and the full prototype of whole Heating Beams (HNBs), MITICA. purpose MITICA to demonstrate that all operational parameters HNB accelerator can be experimentally achieved, thus establishing a large step forward in performances neutral beam injectors comparison present...
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 ITER Neutral Beam Test Facility (PRIMA) is planned to be built at Consorzio RFX (Padova, Italy). PRIMA includes two experimental devices: a full size ion source with low voltage extraction called SPIDER and neutral beam injector power MITICA. the first device operated, aiming testing of negative (made H − in later stage D ions) from an source. main requirements this experiment are /D extracted current density larger than 355/285 A m −2 , energy 100 keV pulse duration up 3600 s. Several...
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...
Abstract The physics design of the accelerator for heating neutral beamline on ITER is now finished and this paper describes considerations choices which constitute basis design. Equal acceleration gaps 88 mm have been chosen to improve voltage holding capability while keeping beam divergence low. Kerbs (metallic plates around groups apertures, attached downstream surface grids) are used compensate beamlet–beamlet interaction point beamlets in right direction. A novel magnetic configuration...
Two linear trap devices for particle beam manipulation (including emittance reduction, cooling, control of instabilities, dust dynamics, and non-neutral plasmas) are here presented, namely, a radiofrequency quadrupole (RFQ) cooler compact Penning with injector. Both dynamics studies by means dedicated codes including the interaction ions buffer gas (up to 3 Pa pressure), electromagnetic design RFQ reported. The multipurpose is aimed study multispecies charged samples, primarily electron...
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....
An ultimate linac structure is realized by an appropriate crystal lattice (superlattice) that serves as a ``soft'' irised waveguide for x rays. High-energy (\ensuremath{\sim}40 keV) X rays are injected into the at Bragg angle to cause Bormann anomalous transmission, yielding slow-wave accelerating fields. Particles (e.g., muons) channeled along axis.
Two Neutral Beam Injectors (NBI) are foreseen to provide a substantial fraction of the heating power necessary ignite thermonuclear fusion reactions in ITER. The development NBI system at unprecedented parameters (40 A negative ion current accelerated up 1 MV) requires realization full scale prototype, be tested and optimized Test Facility under construction Padova (Italy). beam source is key component design multi-grid accelerator goal multi-national collaborative effort. In particular,...
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...
The ITER neutral beam test facility under construction in Padova will host two experimental devices: SPIDER, a 100 kV negative H/D RF source, and MITICA, full scale, 1 MeV deuterium injector. Detection of fusion neutrons be used as means to resolve the horizontal intensity profile. neutron detection system placed right behind SPIDER dump, close emitting surface possible thus providing map emission on dump surface. uses nGEM detectors. These are Gas Electron Multiplier detectors equipped with...
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...
The Divertor Tokamak Test facility (DTT) will be a new experimental located at Frascati, Rome, Italy, whose main goal to have better understanding on hot plasma interactions with plasma-facing components (PFCs) and aid in the development of ITER successively DEMO. improved conceptual design beamline for DTT neutral beam heating (NBH) system is here overviewed, particular focus technical solutions adopted fulfill requirements maximize performances. proposed features providing deuterium...
Deflection of negative ion beamlets due to the magnets embedded in first extraction electrode for purpose dumping co-extracted electrons is a serious issue multiaperture accelerators neutral beam injectors. Several kinds magnet arrays which offer possibility cancelling deflection, employing crossed rows or even more compact parallel row arrangements, are discussed. A general equation beamlet deflection presented here, and interference magnetic electrostatic lens steering carefully...
A 60 kV ion source (9 beamlets of 15 mA each H−) and plasma generators are being developed at Consorzio RFX INFN-LNL, for their versatility in experimental campaigns training. Unlike most sources, the design aimed continuous operation. Magnetic configuration can achieve a minimum |B| trap, smoothly merged with extraction filter. Modular allows quick substitution upgrading parts such as postacceleration grids or electrodes contact plasma. Experiments radio frequency generator Faraday cage...
Ion beam space charge compensation occurs by cumulating in the potential well charges having opposite polarity, usually generated collisional processes. In this paper we investigate case of a H− ion drift, bi-dimensional approximation NIO1 (Negative Optimization phase 1) negative source. transport and plasma formation are studied via particle-in-cell simulations. Differential cross sections sampled to determine velocity distribution secondary particles ionization residual gas (electrons slow...