A5005406873- Magnetic confinement fusion research
- Geological and Geochemical Analysis
- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- earthquake and tectonic studies
- Building materials and conservation
- Occupational and environmental lung diseases
- High-pressure geophysics and materials
- Laser-Plasma Interactions and Diagnostics
- Fusion materials and technologies
- Mineralogy and Gemology Studies
- Metal Extraction and Bioleaching
- Geology and Paleoclimatology Research
- Clay minerals and soil interactions
- Recycling and utilization of industrial and municipal waste in materials production
- Geological and Geophysical Studies Worldwide
- Radioactivity and Radon Measurements
- Geochemistry and Geologic Mapping
- Nuclear and radioactivity studies
- Geological formations and processes
- Mine drainage and remediation techniques
- Extraction and Separation Processes
- Mineral Processing and Grinding
- Nuclear Physics and Applications
University of Milano-Bicocca
2015-2024
Istituto Nazionale di Geofisica e Vulcanologia
2009-2018
Murata (United States)
2015
University of Milan
2004-2013
Princeton University
1986-2010
United States Department of Energy
1998
Princeton Plasma Physics Laboratory
1984-1993
Oak Ridge National Laboratory
1991
United States Department of Commerce
1991
Los Alamos National Laboratory
1991
Abstract The occurrence of crystallized and glassy melt inclusions (MI) in high‐grade, partially melted metapelites metagraywackes has opened up new possibilities to investigate anatectic processes. present study focuses on three case studies: khondalites from the Kerala Khondalite Belt (India), Ronda migmatites (Spain), Barun Gneiss (Nepal Himalaya). results a detailed microstructural investigation are reported, along with some microchemical data bulk composition MI. These were trapped...
The development of noninductive current drive is great importance in establishing the tokamak as a long-pulse or steady-state fusion reactor. Lower hybrid waves, carrying 200 kW power at 800 MHz, have been launched into Princeton Large Torus to initiate and discharge level excess 100 kA.
Abstract The presence of calcite in and near faults, as the dominant material, cement, or vein fill, indicates that mechanical behaviour carbonate-dominated material likely plays an important role shallow- mid-crustal faulting. To better understand calcite, under loading conditions relevant to earthquake nucleation, we sheared powdered gouge Carrara Marble, >98 per cent CaCO3, at constant normal stresses between 1 100 MPa water-saturated room temperature. We performed slide-hold-slide...
Research Article| January 01, 2014 Effect of water on the frictional behavior cohesive rocks during earthquakes M. Violay; Violay 1Istituto Nazionale di Geofisica e Vulcanologia, Via Vigna Murata 605, 00143 Rome, Italy *Current address: ETH D-ERDW, Sonnegstrasse, 5 CH-8092 Zürich, Switzerland; E-mail: marie.violay@ingv.it. Search for other works by this author on: GSW Google Scholar S. Nielsen; Nielsen Italy5Earth Sciences Department, University Durham, South Road, Durham DH13LE, UK B....
Measurements on the TFTR tokamak of electron-temperature-profile evolution and soft-x-ray emissivity a fast (10-\ensuremath{\mu}sec) time scale during sawtooth crash show that significant heat is deposited beyond mixing (or reconnection) radius within 200 \ensuremath{\mu}sec following crash. This extended region in which electron redistributed substantially complicates determination transport properties from subsequent pulse propagation. It shown relaxation this perturbation consistent with...
The evolution of the frictional strength along a fault at seismic slip rates (about 1 m/s) is key factor controlling earthquake mechanics. At mantle depths, friction‐induced melting and melt lubrication may influence seismological data. We report on laboratory experiments designed to investigate dynamic processes in rocks. performed 20 with Balmuccia peridotite high‐velocity rotary shear apparatus cylindrical samples (21.8 mm diameter) over wide range normal stresses (5.4–16.1 MPa),...
In this study, we have used electron-microprobe mapping to investigate plagioclase compositional evolution due cooling kinetics. We re-analyzed five run-products from a prior study (Iezzi et al. 2011), crystallized by natural andesitic melt 1300 800 °C at 25, 12.5, 3, 0.5, and 0.125 °C/ min under atmospheric pressure air redox state. As the rate decreases, texture of large plagioclases changes skeletal hollow nearly equant. use X‑ray map data obtain database 12 275 quantitative chemical...
Circular-limiter H modes are obtained on the TFTR tokamak during high-power neutral-beam heating. The transition is usually from supershot to mode rather than usual L transition, and thus in a low-recycling environment with core fueling mainly heating beams. As result, density pressure profiles highly peaked at center. global confinement time ${\mathrm{\ensuremath{\tau}}}_{\mathit{E}}$ enhanced over L-mode scaling by up \ensuremath{\approxeq}2.5 times. onset of edge-localized MHD shortly...
Effects of high-power ion-Bernstein-wave heating on the PLT tokamak plasmas have been investigated with up to 650 kW rf power coupled plasma. A significant improvement in deuterium particle confinement (as much as 300%) during has observed. Associated it, a longer injected-impurity-confinement time, reduced drift-wave turbulence activity, frequency shifts turbulence, and development large negative edge potential were The ion efficiency,...
The capability of ice-covered surfaces to reflect solar electromagnetic radiation is significantly influenced by mineral dust, one the primary components aerosols. This dust alters reflectance ice, causing a larger portion be absorbed, depending on properties layer.The aim this work apply novel hyperspectral, microphysical and mineralogical interdisciplinary approach for characterisation ice cores entrapped dust. More than 120 m 224 long ADA270 core drilled in 2021 from Adamello glacier...
Critical raw materials (CRM) supply is a challenge that EU countries face, also investing in domestic supplies from mineral ore deposits and anthropogenic (namely landfills extractive waste facilities).This research focuses on the possibilities related to of RM CRM, with focus rare earth elements (REE), through examination large number siliceous rocks Piedmont region (northern Italy). Recovery REE (EW) associated silicate ornamental rock quarries (gneiss, granites diorite) other (i.e. kaolin...
Coupling structures for lower hybrid current drive experiments have, until now, been smaller than a free space wavelength and have had correspondingly broad wavenumber spectrum. The paper reports the results of on PLT tokamak using 16-waveguide grill (2.2 wavelengths) which produces very narrow n∥ = k∥c/ω Experimental from are compared with three other grills less sharply defined n1 spectra. figure merit, , is approximately 40% higher coupler previously reported PLT, in spite larger...
High-resolution electron cyclotron emission and x-ray image reconstructions have been made simultaneously during the sawtooth crash in fast rotating plasma with neutral beam injection heating on TFTR. The measured is identical as metal impurity radiation. results suggest that a full reconnection process of TFTR sawteeth. crescent shaped ``hot spot'' emissivity found not to present flux surfaces. New features are observed crash, such an oval-shaped hot spot cooler region between island spot.
A 20-channel grating instrument based on the Ebert–Fastie monochromator has been built to measure electron temperature profiles and fluctuations in TFTR (tokamak fusion test reactor). Second-harmonic cyclotron emission for plasma over frequency range of 120–400 GHz is utilized; this corresponds a central tokamak magnetic field 2.9–5 T. System sensitivity typically 10-eV rms 2.5-kHz bandpass with 2.5-cm radial resolution 5-cm antenna spot size at center. The ratio largest smallest radius...
The Valmalenco serpentinite (Central Alps, Northern Italy) is marketed worldwide as dimension and decorative stone. However, the same area was once subject to chrysotile asbestos mining, from XIX century until 1975. Asbestos a well-known carcinogen, there possibility of releasing fibres during quarrying, subsequently exposing workers. From 2004 2011, extensive sampling monitoring quarry fronts, veins, commercial stones airborne carried out. Massive rock vein samples were analyzed by combined...