G. Fanourakis
A5031707195- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Photocathodes and Microchannel Plates
- Silicon Carbide Semiconductor Technologies
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Radiation Effects in Electronics
- Adaptive optics and wavefront sensing
National Centre of Scientific Research "Demokritos"
2011-2024
Institute of Nuclear and Particle Physics
2003-2024
The American College of Greece
2024
Istanbul University
2023-2024
The University of Adelaide
2022-2023
Boğaziçi University
2023
Institute of Experimental Physics of the Slovak Academy of Sciences
2020
Centre National de la Recherche Scientifique
2001-2020
Ludwig-Maximilians-Universität München
2020
Cukurova University
2020
Abstract The PICOSEC Micromegas (MM) detector is a precise timing gaseous based on MM operating in two-stage amplification mode and Cherenkov radiator. Prototypes equipped with cesium iodide (CsI) photocathodes have shown promising time resolutions as 24 picoseconds (ps) for Minimum Ionizing Particles. However, due to the high hygroscopicity susceptibility ion bombardment of CsI photocathodes, alternative photocathode materials are needed improve robustness MM. Diamond-like Carbon (DLC) film...
We present a study of antineutrino interactions in hydrogen obtained 138000-picture run at the BNL 7-ft bubble chamber. The beam had an energy distribution that peaked \ensuremath{\sim}1.1 GeV. cross section measured for charged-current is...
This paper describes a time-marking system that enables measurement of the in-plane (horizontal) polarization 0.97-GeV/c deuteron beam circulating in Cooler Synchrotron (COSY) at Forschungszentrum J\"ulich. The clock time each polarimeter event is used to unfold 120-kHz spin precession and assign events bins according direction horizontal polarization. After accumulation for one or more seconds, down-up scattering asymmetry can be calculated matched sinusoidal function whose magnitude...
Abstract The PICOSEC Micromegas (MM) detector is a precise timing gaseous consisting of Cherenkov radiator combined with photocathode and MM amplifying structure. A 100-channel prototype 10 × cm 2 active area equipped Cesium Iodide (CsI) demonstrated time resolution below σ = 18 ps. objective this work to improve the robustness aspects, i.e. integration resistive carbon-based photocathodes, while maintaining good resolution. prototypes have been tested in laboratory conditions successfully...
First experimental results are presented from a search for events with rapidity gap between jets. The D0 detector was used to examine produced by the Fermilab Tevatron pp\ifmmode\bar\else\textasciimacron\fi{} collider at \ensuremath{\surd}s =1.8 TeV. fraction of an observed two highest transverse energy (${\mathit{E}}_{\mathit{T}}$) jets is measured as function pseudorapidity separation jet edges (\ensuremath{\Delta}${\mathrm{\ensuremath{\eta}}}_{\mathit{c}}$). An upper limit 95% confidence...
We present results from the initial run of Fermilab experiment E706. The data include incident π− and p beams at 500 GeV/c on Be Cu targets, span kinematic ranges transverse momentum rapidity 3.5≤pT≤10 −0.7≤yc.m.≤0.7, respectively. have measured cross sections for π0 direct-photon production, as well ηπ0 production ratio. From Cu, we extracted nuclear dependence parametrized Aα. are compared with next-to-leading-log QCD predictions different choices scales several sets parton distribution...
In this paper, we study scalar mediator induced nonstandard interactions (SNSIs) in the context of ESSnuSB experiment. particular, capability to put bounds on SNSI parameters and also impact SNSIs measurement leptonic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> phase <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>δ</c:mi><c:mrow><c:mi>C</c:mi><c:mi>P</c:mi></c:mrow></c:msub></c:math>....
We have studied the production of J/\ensuremath{\psi} and \ensuremath{\psi}(2S) charmonium mesons in 515 GeV/c ${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$Be collisions Feynman-x range 0.1${\mathit{x}}_{\mathit{F}}$0.8. were detected via their decay into ${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$, both ${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$...
Micromegas technology is a promising candidate to replace Atlas forward muon chambers -tracking and trigger- for future HL-LHC upgrade of the experiment. The LHC accelerator luminosity will be ten times nominal one, increasing background pile-up event probability in same proportion. This requires detector performances which are currently under studies intensive RD activities.
Abstract The PICOSEC Micromegas precise timing detector is based on a Cherenkov radiator coupled to photocathode operating in semi-transparent mode and amplification structure. first proof of concept single-channel prototype was able achieve time resolution below 25 ps. One the crucial aspects development gaseous detectors applicable high-energy physics experiments modular design that enables large area coverage. 19-channel multi-pad with an active approximately 10 cm 2 suffered from...
With the tenfold luminosity increase envisaged at HL-LHC, background (photons, neutrons, ...) and event pile-up probability are expected to in proportion different experiments, especially forward regions like, for instance, muons chambers of ATLAS detector. Detectors based on Micromegas principle should be good alternatives detector upgrade HL-LHC framework because a spatial (<100 \mum) time (few ns) resolutions, high-rate capability, radiation hardness, robustness possibility build large...
We report on a sample of $\frac{J}{\ensuremath{\psi}}$ mesons coming from secondary vertices, characteristic heavyquark decay, detected in the Fermilab Meson West spectrometer. Based eight signal events which emerges vertex occurring an air-gap region, we obtain inclusive $b\overline{b}$ cross section 75 \ifmmode\pm\else\textpm\fi{} 31 26 nb/nucleon. This result is compared to recent QCD predictions. have also observed several exclusive decay modes...
We report new measurements of inclusive direct photon production at high transverse momenta (${\mathit{p}}_{\mathit{T}}$) for ${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$ and p interactions on Be 500 GeV/c. The yields as a function ${\mathit{p}}_{\mathit{T}}$ rapidity (y) are in good agreement with expectations from next-to-leading-log QCD calculations employing recently extracted quark gluon structure functions.
Detectors with a time resolution of few tens picoseconds and long-term durability in high particle fluxes are necessary for an accurate vertex separation future physics experiments. The PICOSEC-Micromegas detector concept is Micro-Pattern Gaseous Detector (MPGD) based solution addressing this particular challenge. It on Micromegas coupled to Cherenkov radiator photocathode. Primary electrons from the incident particles generated photocathode fluctuations due different primary ionisation...
The PICOSEC Micromegas detector is a precise timing gaseous based on Cherenkov radiator coupled to semi-transparent photocathode and amplifying structure. First single-pad prototypes demonstrated time resolution below σ= 25 ps, however, make the concept appropriate physics applications, several developments are required. objective of this work was achieve an equivalent for 10 × cm2 area detector. prototype designed, produced tested in laboratory successfully operated with 80 GeV/c muon beam....
We present results on the production of high transverse momentum charm mesons in collisions 515 GeV/c negative pions with beryllium and copper targets. The experiment recorded a large sample events containing (pT) showers detected an electromagnetic calorimeter. From these data, has been reconstructed via their decay into fully charged Kππ mode. A measurement single inclusive distribution D from 1 to 8 is presented. An extrapolation measured differential cross section yields integrated D±...