A5000046334- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Precipitation Measurement and Analysis
- Atomic and Subatomic Physics Research
- Electromagnetic Compatibility and Measurements
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
Hellenic Open University
2008-2022
We have searched for solar axions or other pseudoscalar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup. Whereas we previously reported results from CAST with evacuated magnet bores (Phase I), setting limits on lower mass axions, here report where were filled 4He gas II) of variable pressure. The introduction generates a refractive photon mγ, thereby achieving maximum possible conversion rate those axion masses ma match mγ. With 160 different...
Studying atmospheric neutrino oscillations in the few-GeV range with a multi-megaton detector promises to determine mass hierarchy. This is main science goal pursued by future KM3NeT/ORCA water Cherenkov Mediterranean Sea. In this paper, processes that limit obtainable resolution both energy and direction charged-current events ORCA are investigated. These include composition of hadronic fragmentation products, subsequent particle propagation photon-sampling fraction detector. GEANT...
Astroneu is an array of autonomous stations to detect Extensive Air Showers, which deployed at the Hellenic Open University campus on outskirts Patras in western Greece. Currently 9 scintillators detectors and 3 Radio Frequency (RF) antennas have been installed operated site. The detector units are arranged three each consisting scintillator one RF antenna. We present hardware components array, online software for remote control, monitor Data Acquisition, as well offline simulation...
The HELYCON project aims at the installation of cosmic air-shower detectors on roofs high-school buildings in western Greece. During last four years, made a substantial progress. Three stations were installed and are still operation Hellenic Open University (HOU) campus, while small-scale detector ( μ Cosmics detector), suitable for classroom operation, was developed. construction these detectors, many experimental tests calibration procedures established, offering framework educational...
The Astroneu array comprises 9 large charged particle detectors and 3 RF antennas arranged in three autonomous stations operating at the University Campus of Hellenic Open city Patras. Each station detects extensive air showers with primary energy threshold about 10 TeV, while double coincidence events select energies higher than TeV. In such an environment, radio detection is challenging. signals besides being extremely weak they also suffer from strong human made electromagnetic noise....
The Hellenic Open University (HOU) Cosmic Ray Telescope (ASTRONEU) consists of 9 large scintillator detectors and 3 RF antennas arranged in three autonomous stations operating at the campus city Patras. High energy showers that are detected simultaneously by two distant coincidence with used to study signature cosmic events. In previous studies we have shown timing signals as well measured electric field position very good agreement simulation predictions. this work concentrate on transfer...
The Hellenic Open University extensive air shower array (also known as Astroneu array) is a small scale hybrid detection system operating in an area with high levels of electromagnetic noise from anthropogenic activity. In the present study we report latest results data analysis concerning estimation direction using spectrum RF system. recent layout array, 4 antennas were receiving common trigger autonomous station 3 particle detectors. directions estimated are very good agreement...
High-energy cosmic rays are one of the primary sources information for scientists investigating elementary properties matter. The need to study with energies many orders magnitude larger than those encountered in particle accelerators led development modern detection hardware and experimental methodologies. We present a low power, complexity data acquisition (DAQ) system 100 ps resolution, suitable radiation experiments. uses multiple-time-over-threshold (MToT) technique treatment output...
Three autonomous HELYCON stations have been installed, calibrated and operated at the Hellenic Open University campus, detecting cosmic ray air showers. A software package for detailed simulation of detectors' response stations' operation has developed. In this work we present results analysis data collected by during a period one year half. The performance telescope is compared found in very good agreement with predictions package. angular resolution each station 3 to 5 degrees depending on...
High energy cosmic rays, with energies thousands of times higher than those encountered in particle accelerators, offer scientists the means investigating elementary properties matter. In order to detect high new detection hardware and experimental methods are being developed. this work, we describe network HELYCON (HEllenic LYceum Cosmic Observatories Network) autonomous stations for directional reconstruction Extended Atmospheric Showers (EAS) particle-fronts. hybrid consisting three large...
In this document the simulation part of Hellenic Open University Reconstruction & Simulation (HOURS) software package is described in detail. HOURS can be used for generation, simulation, pattern recognition and reconstruction high energy neutrino produced events a very large volume telescope. The objective to provide as accurate possible representation event properties wide range telescope configurations medium optical properties. Moreover, contains Extensive Air Showers (EAS) using...