A5040204479- Fusion materials and technologies
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Magnetic confinement fusion research
- Ion-surface interactions and analysis
- Plasma Diagnostics and Applications
- Nuclear Materials and Properties
- Nuclear Physics and Applications
- Boron and Carbon Nanomaterials Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Advanced Surface Polishing Techniques
- Advanced materials and composites
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Laser-induced spectroscopy and plasma
- Surface Roughness and Optical Measurements
- Silicon Nanostructures and Photoluminescence
- Superconducting Materials and Applications
- Copper Interconnects and Reliability
- Luminescence and Fluorescent Materials
- Ammonia Synthesis and Nitrogen Reduction
- Carbon Nanotubes in Composites
- Metallurgical Processes and Thermodynamics
- Electron and X-Ray Spectroscopy Techniques
Institute for the Science and Technology of Plasmas
2022
National Research Council
2015-2020
Institute of Plasma Physics
2012-2020
University of Milan
2008
The provision of a particle and power exhaust solution which is compatible with first-wall components edge-plasma conditions key area present-day fusion research mandatory for successful operation ITER DEMO. work package plasma-facing (WP PFC) within the European programme complements laboratory experiments, i.e. in linear plasma devices, electron ion beam loading facilities, studies performed toroidally confined magnetic such as JET, ASDEX Upgrade, WEST etc. connection both groups done via...
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...
Tungsten (W) will be used as material for plasma-facing components (PFCs) in the divertor of ITER and interact with Helium (He) ions either from initial He plasma operation or Deuterium-Tritium (DT) fusion reactions active phase.Laboratory experiments reported that a specific operational window impact energy, ion fluence, andmodification W surfaces occurs resulting formation He-induced nanostructures.Experiments ASDEX Upgrade H-mode plasmas (B t = 2.5T, I p 0.8M A, P aux ≃ 8.0M ) have been...
Research into valid alternatives to |$^{3}$|He detectors is fundamental the affordability of new neutron spallation sources like European Spallation Source (ESS). In case ESS it also essential develop high-rate that can fully exploit increase flux relative present sources. One technologies fulfilling these requirements gas electron multiplier (GEM), since combine a high rate capability (MHz|$/$|mm|$^{2}$|), coverage area up 1 m|$^{2}$| and space resolution better than 0.5 mm. Its use as...
Plasma-wall interactions have been studied in the full-W ASDEX Upgrade during its dedicated helium campaign. Relatively clean plasmas with a He content of >80% could be obtained by applying ion cyclotron wall conditioning (ICWC) discharges upon changeover from D to He. However, co-deposited layers significant amounts and were measured on W samples exposed ICWC at low-field side (outer) midplane. This is sign local migration accumulation materials residual fuel regions shadowed direct plasma...
Nitrogen (N) seeding is routinely applied in tokamaks with tungsten (W) walls to control the power exhaust toward divertor. Open questions, concerning interaction of N W, are influence ion energy and W temperature on retention implanted erosion by deuterium (D) nitride being formed. Moreover, extremely high particle fluxes ITER DEMO will erode tiles sputtered atoms re-deposit forming W-based layers a different behaviour seeded D plasmas. In this work, films morphology structure were exposed...
A comprehensive analysis of composition and morphology metallic micrometric particles collected in FTU during the 2013 shut-down is presented. The data-set analyzed result years experimental activity which a full metal machine since beginning operation with liquid lithium limiter (LLL) from 2005. It was found that population, consisting flakes, smashed spheroidally shaped plasma facing components (mainly SS Mo), exhibits an unexpectedly high, up to 70 wt%, fraction magnetic grains. change...
Iron-tungsten (Fe-W) mixed films were exposed to the low flux deuterium plasma of GyM in order study behavior sputtering yield with ion fluence and temperature samples. From literature, it is known that an increase former lowers Fe-W layers' as a consequence preferential Fe leading enrichment W outermost layers. An opposite trend was instead found for latter probably due inter-diffusion (effective from 200 °C) resulting suppression enrichment. Moreover, 500 °C, also segregation surface...
Plasma assisted CVD is now an established technique for the growth of a variety dielectrics and semiconductors. The versatility in-house developed direct-current (dc) microplasma deposition system demonstrated here wide range carbon-based materials. Diamond, nanodiamond, nanocrystalline graphite, single-wall carbon nanotubes, few-layer graphene have been deposited using same dc 0.5% CH4/H2 gas feed, but changing only substrate temperature (in 500–1150 °C) total pressure (0.3–200 Torr)....
Nitrogen used to reduce the power load onto divertor in tokamak fusion devices (JET, AUG) has drawback of ammonia formation. Non-negligible quantity tritiated could be a serious concern for ITER, since it cannot reduced through presently designed fuel cycle loop. In this paper we report study production ND3 as function electron temperature (Te) and neutral pressure N2/D2 plasma mixture linear machine GyM. The nitrogenized compounds were monitored by Optical Emission Spectroscopy (OES) Mass...
The process of deep texturization the crystalline silicon surface is intimately related to its promising diverse applications, such as bactericidal surfaces for integrated lab-on-chip devices and absorptive optical layers (black silicon-BSi). Surface structuring by a maskless appeals cost-effective approach, which up-scalable large-area production. In case silicon, it occurs means reactive plasma processes (RIE-reactive-ion etching) using fluorocarbon CF4 H2 reaction gases, leading...
Microplasma jets are now widely used for deposition, etching, and materials processing. The present study focuses on the investigation of influence cathode geometry deposition quality, microplasma jet systems in low vacuum. interest here is understanding hydrogen sputtering and/or evaporation electrodes. Samples obtained with two geometries tapered rectangular cross-sections have been investigated experimentally by scanning electron microscopy energy dispersion X-ray spectroscopy. a...
Due to the well-known problem of 3He shortage, a series different thermal neutron detectors alternative helium tubes are being developed, with goal find valid candidates for detection systems future spallation sources such as European Spallation Source (ESS). A possible 3He-free detector candidate is charged particle equipped three dimensional converter cathode (3D-C). The 3D-C currently under development composed by alumina (Al2O3) lamellas coated 1 μ m 10B enriched boron carbide (B4C). In...