A5078033973- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Cold Fusion and Nuclear Reactions
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Nuclear physics research studies
- X-ray Spectroscopy and Fluorescence Analysis
National Research Council
2024
Institute for the Science and Technology of Plasmas
2021-2024
At present, magnetic confinement fusion devices rely solely on absolute neutron counting as a direct way of measuring power. Absolute deuterium-tritium gamma rays could provide the secondary neutron-independent technique required for validation scientific results and licensing tool future power plants. However, this approach necessitates an accurate determination gamma-ray-to-neutron branching ratio. The ratio reaction ^{3}H(^{2}H,γ)^{5}He/^{3}H(^{2}H,n)^{4}He was determined in plasmas at...
The spectral 𝛾 ray emission from the reaction 3H(2H,𝛾)5He has been measured for first time in a magnetic confinement deuterium-tritium plasma experiment at Joint European Torus. A custom developed gamma spectrometer system based on LaBr3 scintillator combined to LiH neutron attenuator and zero dead fast digital data acquisition allowed measure weak under ≈105 more intense 14MeV field. 𝑅-matrix analysis of 5He nucleus used predict expected spectrum which compared with measurement, but...
Dedicated nuclear diagnostics have been designed, developed, and built within EUROFUSION enhancement programs in the last ten years for installation at Joint European Torus capable of operation high power Deuterium-Tritium (DT) plasmas. The recent DT Experiment campaign, called DTE2, has successfully carried out second half 2021 provides a unique opportunity to evaluate performance new an understanding their behavior record 14 MeV neutron yields (up 4.7 × 1018 n/s) total number neutrons 2...
In the frame of design activities Divertor Tokamak Test (DTT) facility development a comprehensive set neutron and gamma-ray diagnostics is on-going in order to enable measurements of: yield, yield rate, emissivity over poloidal section through plasma; emission spectrum; runaway electrons induced bremsstrahlung radiation from reactions between fast ions plasma impurities. The present paper provides an overview DTT describes status their including main components interfaces, detector types...
Abstract Unfolding techniques are employed to reconstruct the 1D energy distribution of runaway electrons from Bremsstrahlung hard X-ray spectrum emitted during plasma disruptions in tokamaks. Here we compare four inversion methods: truncated singular value decomposition, which is a linear algebra technique, maximum likelihood expectation maximization, an iterative method, and Tikhonov regularization applied χ 2 Poisson statistics, two minimization approaches. The reconstruction fidelity...