A5030191391- Fusion materials and technologies
- Nuclear Materials and Properties
- Graphite, nuclear technology, radiation studies
- Ion-surface interactions and analysis
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- Radiation Shielding Materials Analysis
- Nuclear materials and radiation effects
- Radiation Effects in Electronics
- Semiconductor materials and devices
- Non-Destructive Testing Techniques
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Silicon and Solar Cell Technologies
- Microstructure and Mechanical Properties of Steels
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- Superconducting Materials and Applications
- Metal Alloys Wear and Properties
- Magnetic confinement fusion research
- Graphene research and applications
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Boron and Carbon Nanomaterials Research
- Hydrogen embrittlement and corrosion behaviors in metals
National Centre of Scientific Research "Demokritos"
2012-2024
Institute of Nuclear and Particle Physics
2021-2024
Institute of Nuclear & Radiological Sciences and Technology, Energy & Safety
2016-2020
National and Kapodistrian University of Athens
2016-2019
In search of a low-Z pion production target for the Long Baseline Neutrino Facility (LBNF) Deep Underground Experiment (DUNE) four graphite grades were irradiated with protons in energy range 140--180 MeV, to peak fluence $\ensuremath{\sim}6.1\ifmmode\times\else\texttimes\fi{}{10}^{20}\text{ }\text{ }\mathrm{p}/{\mathrm{cm}}^{2}$ and irradiation temperatures between $120--200\text{ }\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. The test array included POCO ZXF-5Q, Toyo-Tanso IG 430,...
The NT-02 neutrino physics target made of the isotropic graphite grade produced neutrinos for MINOS and MINERVA high-energy experiments. segmented, 95-cm-long was bombarded with a 340 kW, Gaussian 1.1 mm sigma beam 120 GeV protons reaching $6.516\ifmmode\times\else\texttimes\fi{}{10}^{20}$ on peak fluence $8.6\ifmmode\times\else\texttimes\fi{}{10}^{21}\text{ }\text{ }\mathrm{protons}/{\mathrm{cm}}^{2}$. Reductions in detected events during experiment were attributed to radiation-induced...
The effects of proton beams irradiating materials considered for targets in high-power accelerator experiments have been studied using the Brookhaven National Laboratory's (BNL) 200 MeV linac. A wide array and alloys covering a range atomic number (Z) are being scoped by community prompting BNL studies to focus on representing each distinct range, i.e. low-Z, mid-Z high-Z. low includes such as beryllium graphite, midrange Ti-6Al-4V, gum metal super-Invar finally high-Z pure tungsten...
The effect of carbon on the point defect migration properties in Fe–Cr alloys with a concentration 11 at.% Cr is studied by means resistivity recovery measurements after low temperature proton irradiation. presence mainly affects features spectra ranges (a) 150–200 K, which are linked to self-interstitial defects, and (b) 400–500 probably due vacancy vacancy-carbon complexes. experimental results discussed terms possible interactions radiation defects its influence solute atom re-ordering.
A comprehensive study on the effects of energetic protons carbon-fiber composites and compounds under consideration for use as low-Z pion production targets in future high-power accelerators low-impedance collimating elements intercepting TeV-level at Large Hadron Collider has been undertaken addressing two key areas, namely, thermal shock absorption resistance to irradiation damage. Carbon-fiber various fiber weaves have widely used aerospace industries due their unique combination high...
Carbon fiber composites (CFC) are, among other applications, already in use as low-impedance collimating elements for intercepting TeV-level protons machines, like the CERN Large Hadron Collider. Towards a comprehensive understanding of these materials' properties and behavior, series radiation damage campaigns have been undertaken order to quantitively investigate response AC-150 K CFC high proton fluences. The CFCs dimensional changes, stability, micro-structural evolution, structural...
In recent years, amorphous metals in the form of nanostructured protective coatings on steel substrates have received substantial consideration for applications extreme environments comprised neutron fluxes, temperature and aggressively corrosive environments. Such are postulated to exhibit superior resistance radiation damage because microstructure offers a plethora sites which radiation-induced defects can migrate where they ultimately stopped.
Background: Calculations of $p$-nuclei abundances depend heavily on the Hauser-Feshbach (HF) theory to compute cross sections and, consequently, reaction rates entering a huge network encompassing nearly 2000 isotopes, vast majority which are unstable. Therefore, successful reproduction relies reliability nuclear parameters HF calculations, i.e., optical model potential (OMP), level density (NLD), and $\ensuremath{\gamma}$-ray strength function ($\ensuremath{\gamma}\mathrm{SF}$).Purpose: New...
One of the future multi-MW accelerators is LBNE Experiment where Fermilab aims to produce a beam neutrinos with 2.3 MW proton as part suite experiments associated Project X. Specifically, Neutrino Beam Facility for 2+ MW, 60 -120 GeV pulsed, high intensity produced in X accelerator intercepted by low Z solid target facilitate production energy neutrinos. The level will be characterized intensities order 1.6 e+14 p/pulse, σ radius 1.5 -3.5 mm and 9.8 microsecond pulse length. These parameters...
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Core SiO2 quartz fibers of the Large Hadron Collider (LHC) ATLAS Zero-degree Calorimeter (ZDC) are expected to experience integrated doses a few giga-Rad (Grad) at their closest position LHC beam. An array was irradiated with 200 MeV protons and spallation-generated mixed spectra (primarily fast neutrons) Brookhaven National Laboratory (BNL) Linac. Specifically, 1 mm- 2 mm-diameter (GE 124) rods 50 mm length were exposed direct leading peak dose ∼28 Grad (∼0.28 GGy). Exposure neutron flux...
High temperature refractory materials and alloys including Mo TZM have been considered studied to assess their applicability in fusion reactor applications addition spallation targets particle accelerators. The impacts of neutron, proton ion irradiation on the properties microstructure pure its combination evaluated through illumination damage studies. Cold- worked molybdenum (CW half), described by a comprising non-consistently extended grains, has for use Large Hadron Collider 7 TeV shaft...
As an important part of fusion materials research, evaluation radiation damage in has been emphasized more than a half century. In order to improve our understanding materials, upgrade performed the irradiation facility IR2, which is located at NCSR “Demokritos” 5.5 MV TANDEM accelerator. The upgraded allows higher ion beam currents while ensuring that target temperature remains below 10 K. It provides in-situ electrical resistivity measurements on several samples for real-time monitoring as...
Ferritic-martensitic steels are considered as prime candidates for the first wall and blanket structural materials in future Fusion Power Plants. They based on Fe-Cr alloys with Cr concentration up to 15%. Therefore, a step towards understanding irradiation behaviour of these steels, study pure model system plays an important role. The flexibility offered by ion beams accurately defining conditions, allows us perform controlled experiments that will aid validation recent theories radiation...