A5062194878- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Magnetic confinement fusion research
- Nuclear physics research studies
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Fusion materials and technologies
- Superconducting Materials and Applications
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Astronomical and nuclear sciences
- Medical Imaging Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Spectroscopy and Laser Applications
- Scientific Computing and Data Management
- Muon and positron interactions and applications
- Advanced Data Storage Technologies
- Ionosphere and magnetosphere dynamics
- Nuclear Materials and Properties
- Advanced Chemical Physics Studies
- Radiation Therapy and Dosimetry
- Neutrino Physics Research
Culham Science Centre
2024
Culham Centre for Fusion Energy
2024
University of Rome Tor Vergata
2024
National Centre for Nuclear Research
2007-2022
Royal Military Academy
2020
Centrum Badań Jakości
2016-2018
Uppsala University
2009
Forschungszentrum Jülich
1996-2001
University of Zurich
2001
RWTH Aachen University
2001
The pp→pK+Y0 reaction has been studied for hyperon masses m(Y0)⩽1540MeV/c2 at COSY-Jülich by using a 3.65 GeV/c circulating proton beam incident on an internal hydrogen target. Final states comprising two protons, one positively charged kaon and negatively pion have identified with the ANKE spectrometer. Such configurations are sensitive to production of ground state Λ Σ0 hyperons as well Σ0(1385) Λ(1405) resonances. Applying invariant- missing-mass techniques, overlapping excited could be...
We here present the principles and main physics capabilities behind design of radial gamma ray spectrometers (RGRS) system for alpha particle runaway electron measurements at ITER. The diagnostic benefits from recent advances in gamma-ray spectrometry tokamak plasmas combines space high energy resolution a single device. RGRS as designed can provide information on particles time scale 1/10 slowing down ITER 500 MW full power DT scenario. Spectral observations 3.21 4.44 MeV peaks reaction...
Gamma-ray spectroscopy measurements at MHz counting rates have been carried out, for the first time, with a compact spectrometer based on LaBr3 scintillator and silicon photomultipliers. The instrument, which is also insensitive to magnetic fields, has developed in view of upgrade gamma-ray camera diagnostic α particle deuterium-tritium plasmas Joint European Torus. Spectra were measured up 2.9 projected energy resolution 3%-4% 3-5 MeV range, interest fast ion physics studies fusion plasmas....
In this work, we describe the solution developed by gamma ray camera upgrade enhancement project to improve spectroscopic properties of existing JET γ-ray camera. Aim is enable gamma-ray spectroscopy in deuterium-tritium plasmas. A dedicated pilot spectrometer based on a LaBr3 crystal coupled silicon photo-multiplier has been developed. proper pole zero cancellation network able shorten output signal length 120 ns implemented allowing for at MHz count rates. The system characterized...
Abstract LaBr 3 :Ce,CeBr and GAGG:Ce scintillators were investigated the determined characteristics compared with those obtained for well-known widely used CsI:Tl NaI:Tl crystals. All detectors of same size 10 × 5 mm . The aim this test study was to single out scintillation most suitable γ-ray spectrometry emission radial profile measurements in high-temperature plasma experiments. Decay time, energy resolution, non-proportionality full peak detection efficiency ere measured energies up 1770...
The JET gamma-ray cameras have been recently upgraded within the camera upgrade project in support of development high performance deuterium plasma scenarios and preparation deuterium-tritium experiments. New, dedicated detectors based on a LaBr3 crystal silicon photo-multipliers developed replaced pre-existing CsI all 19 channels. new instrument gives opportunity making two-dimensional measurements with counting rate capability exceeding 1 MCounts/s (MCps) energy resolution better than 5%...
The recoil shadow method for the detection of fission fragments has been used to investigate delayed very heavy \ensuremath{\Lambda} hypernuclei produced in $p$-U interaction at projectile energy 1.5 GeV. From measured distribution events region and calculated momenta leaving target lifetime hyperon was determined be $\ensuremath{\tau}=2.40\ifmmode\pm\else\textpm\fi{}60$ ps. comparison number with that prompt leads an estimation cross section production $p+$U collisions GeV...
In forthcoming deuterium-tritium (DT) experiments on JET a significant population of alpha-particles will be produced. For operating alpha-particle diagnostics at high DT neutron fluxes, specific improvements have to made. Proposed new detectors for gamma-ray measurements based CeBr3 and LaBr3:Ce scintillators. They are characterized by good energy resolution, relatively detection efficiency few MeV gamma-rays fast response time. An overview scintillator parameters is presented. A...
A new tangential gamma-ray spectrometer has been developed for fast ion measurements in deuterium and deuterium–tritium plasmas of the Joint European Torus (JET). The instrument is based on a LaBr3 crystal with photo-multiplier tube replaces pre-existing bismuth germanate detector, providing enhanced energy resolution counting rate capability MHz range. line sight equipped LiH attenuator, which reduces background due to 14 MeV neutron interactions by more than two orders magnitude enables...
The reaction $pp\ensuremath{\rightarrow}d{K}^{+}{\overline{K}}^{0}$ has been investigated at an excess energy of $Q=46\text{ }\mathrm{M}\mathrm{e}\mathrm{V}$ above the ${K}^{+}{\overline{K}}^{0}$ threshold with ANKE cooler synchrotron COSY-J\"ulich. From detected coincident $d{K}^{+}$ pairs, about 1000 events a missing ${\overline{K}}^{0}$ were identified, corresponding to total cross section...
Indications for the production of a neutral excited hyperon in reaction pp --> pK+Y0* are observed an experiment performed with ANKE spectrometer at COSY-Jülich p(beam) = 3.65 GeV/c. Two final states were investigated simultaneously, viz. Y0* pi+X- and pi-X+, consistent results obtained spite quite different experimental conditions. The parameters state M(Y0*) (1480 +/-15) MeV/c2 gamma(Y0*) (60 +/- 15) MeV/c2. cross section decaying through these channels is order few hundred nanobarns....
The JET tangential gamma-ray spectrometer is undergoing an extensive upgrade in order to make it compatible with the forthcoming deuterium-tritium (DT) experiments. paper presents results of design for main components beam-line: tandem collimators, shields, and neutron attenuators. existing collimators will be upgraded by installing two additional collimator modules. Two shields define field-of-view at detector end line-of-sight. A set three lithium hydride attenuators used control level...
A new compact gamma-ray spectrometer based on a Silicon Photo-Multiplier (SiPM) coupled to LaBr3(Ce) crystal has been developed for the upgrade of Gamma Camera (GC) JET, where it must operate in high intensity neutron/gamma-ray admixed field. The work presents results an experiment aimed at characterizing effect 14 MeV neutron irradiation both and SiPM that compose full detector. pulse height spectrum from interactions with measured is successfully reproduced by MCNP simulations. It...
Basic concepts and the development of a high counting rate digital spectrometry system based on efficient ADCs latest available FPGA are presented with aim using such system, coupled to fast scintillators, in plasma experiments. The prototype is 1 channel 12-bit GSPS digitizer 2 Vpp input voltage. Preliminary results tested different radioactive sources shown for low (0.03 Mcps) (2.2 rates. A comparison energy spectra resolution what obtained by commercial device also shown.
The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new detectors, based on LaBr3(Ce) scintillation crystals, which add spectroscopic capability to existing system allowing measurements good energy resolution (5% at 0.622 MeV), a dynamic range from hundreds keV up about 30 MeV, and high counting rate capabilities MCps. First during C38 campaign JET have successfully carried out, in particular, D–3He plasmas three-ion ion cyclotron resonance...