A5102964741- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Luminescence Properties of Advanced Materials
- High-pressure geophysics and materials
- Nuclear physics research studies
- Glass properties and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Graphite, nuclear technology, radiation studies
- Radioactivity and Radon Measurements
- Advanced X-ray and CT Imaging
- Law and Political Science
- Radiation Shielding Materials Analysis
- Enhanced Oil Recovery Techniques
- Superconducting Materials and Applications
- Geophysical Methods and Applications
- Field-Flow Fractionation Techniques
- Advanced Manufacturing and Logistics Optimization
- NMR spectroscopy and applications
- Criminal Law and Policy
- Hydrocarbon exploration and reservoir analysis
Forschungszentrum Jülich
2012-2023
European Spallation Source
2020
Heinrich Heine University Düsseldorf
2018
IPS Elektroniklabor (Germany)
2003
Ernst Ruska Centre
1997
The KWS-1 small-angle neutron scattering (SANS) instrument operated by the Jülich Centre for Neutron Science (JCNS) at research reactor FRM II of Heinz Maier-Leibnitz Zentrum in Garching near Munich has been recently upgraded. was updated, from its active collimation apertures to detector cabling. Most parts were installed first time, including a broadband polarizer, large-cross-section radio-frequency spin flipper, chopper and lenses. A custom-designed hexapod sample position allows heavy...
An overview is provided of the 15 neutron beam instruments making up initial instrument suite European Spallation Source (ESS), and being made available to user community. The ESS source consists a high-power accelerator target station, providing unique long-pulse time structure slow neutrons. design considerations behind structure, moderator geometry layout are presented. 15-instrument two small-angle instruments, reflectometers, an imaging beamline, single-crystal diffractometers; one for...
The PREFER (Polarization REsearch for Fusion Experiments and Reactors) collaboration was born to address the know–how in different fields techniques challenging bet on fusion energy production with polarized fuel. Efforts are focused a variety of tasks objectives, which under responsibility institutes. Starting from open questions reaction physics, such as study D+D spin–dependent cross–sections measurements nuclear polarization conservation laser–induced plasmas, there is still unexplored...
For high resolution positron emission tomographs based on scintillation detectors a fast, dense, and bright scintillator is required. A sample of new scintillator, Lu/sub 0.8/Y/sub 0.2/AlO/sub 3/:Ce (LuYAP) with density 7.7 g/cm/sup 3/ decay time 20 160 ns compared LSO BGO crystals the same size to estimate potential crystal for PET detectors. Special attention was paid use an application specific measurement setup respect PET. The light yield using polished as well PTFE tape BaSO/sub 4/...
There are no efficient Eu2+ doped glass neutron scintillators reported due to low doping concentrations of and the amorphous nature matrix. In this work, an CaF2:Eu ceramic scintillator was prepared by forming nanocrystals in a 6Li-containing Through appropriate thermal treatments, scintillation light yield transparent increased factor at least 46 compared as-cast glass. This improvement attributed more energy transfer from CaF2 crystals emitting centers. Further is expected if refractive...
The KWS-2 SANS diffractometer is dedicated to the investigation of soft matter and biophysical systems covering a wide length scale, from nm µm.The instrument optimized for exploration momentum transfer Q range between 1x10-4 0.5 Å -1 by combining classical pinhole, focusing (with lenses), time-of-flight chopper) methods, while simultaneously providing high-neutron intensities with an adjustable resolution.Because its ability adjust intensity resolution within limits during experiment,...
Following demand from the user community regarding possibility of improving experimental resolution, dedicated high-intensity/extended Q-range SANS diffractometer KWS-2 Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Center in Garching was equipped with a double-disc chopper variable opening slit window and time-of-flight (TOF) data acquisition option. The used concert high-intensity velocity selector enables tuning will wavelength resolution Δλ/λ within broad range, 20% (standard)...
Small-K Advanced DIffractometer (SKADI is a Small-Angle Neutron Scattering (SANS) instrument to be constructed at the European Spallation Source (ESS). SANS instruments allow investigations of structure materials in size regime between Angstroms up micrometers. As very versatile instruments, they usually cater scientific needs communities, such as chemists, biologists, and physicists, ranging from material food sciences archeology. They can offer analysis micro- mesoscopic samples, well an...
A new detection system based on an array of 3 He tubes and innovative fast electronics has been installed the high-intensity small-angle neutron scattering (SANS) diffractometer KWS-2 operated by Jülich Centre for Neutron Science (JCNS) at Heinz Meier-Leibnitz Zentrum in Garching, Germany. The is composed 18 eight-pack modules that work independently one another (each unit its own processor electronics). To improve read-out characteristics reduce noise, are mounted a closed case rear tubes'...
A new two-dimensional position-sensitive detector system for small-angle neutron scattering experiments is under development. It based on a 60/spl times/60 cm/sup 2/ large /sup 6/Li-glass scintillator the capture and dispersion of emitted light an array photomultiplier tubes derivation event position. For subthermal neutrons 8 /spl Aring/, efficiency 96% spatial resolution mm are to be achieved. Major improvements have been made in signal- data-processing branch, which aims at electronic...
Neutron radiation is a highly penetrating probe, routinely used for non-destructive testing of engineering components and analysis the structure dynamics novel advanced materials. The same analytical techniques can be employed chara
New high-flux and high-brilliance neutron sources demand a higher count-rate capability in detectors. In order to achieve that goal, the Solid-State Neutron Detector (SoNDe) project is developing scintillation-based detector. It will be capable of fully exploiting available flux at small-angle scattering (SANS) instruments high brilliance sources, such as SKADI European Spallation Source (ESS). The read-out scintillator based on pixelized multi-anode PMT (MaPMT), where each pixel treated...
During the upgrade of small-angle neutron scattering instrument KWS-1 at research reactor FRJ-2, 15-yr-old detector system has been replaced. While Anger camera-based concept remained unchanged, signal and data processing branch completely revised. Because higher count rate requirements, a highly configurable parallel readout electronics developed aiming counting rates several hundred kilohertz. The whole recently installed measurements to study performance have carried out. linearity...
High Current Accelerator driven Neutron Sources (HiCANS) are a cost-efficient alternative for future large scale neutron facilities. They excel in transforming neutrons released by the primary nuclear reaction into spectral range usable applications. In particular, cost of target station represents only minor fraction overall construction due to lower energy neutrons, which requires less shielding. can be designed provide optimized pulse and properties applications scattering, analytics...
The software package ANTS (Anger-camera type Neutron detector: Toolkit for Simulations), developed simulation of Anger-type gaseous detectors thermal neutron imaging was extended to include a module experimental data processing. Data recorded with sensor array containing up 100 photomultiplier tubes (PMT) or silicon photomultipliers (SiPM) in custom configuration can be loaded and the positions energies events reconstructed using Center-of-Gravity, Maximum Likelihood Least Squares algorithm....
This are the cumulated reports of SoNDe detector Project as July 2017. The contained are: - Report on 1x1 module technical demonstrator used materials radiation hardness components potential additional applications 2x2 test results
The response of a position-sensitive Li-glass scintillator detector being developed for thermal-neutron detection with 6 mm position resolution has been investigated using collimated beams thermal neutrons. was moved perpendicularly through the neutron in 0.5 to 1.0 horizontal and vertical steps. Scintillation detected an 8 × pixel multi-anode photomultiplier tube on event-by-event basis. In general, several pixels registered large signals at each neutron-beam location. number registering...
A custom and fully interactive simulation package ANTS (Anger-camera type Neutron detector: Toolkit for Simulations) has been developed to optimize the design operation conditions of secondary scintillation Anger-camera gaseous detectors thermal neutron imaging. The code accounts all physical processes related capture, energy deposition pattern, drift electrons primary ionization scintillation. photons are traced considering wavelength-resolved refraction transmission output window....
The response of a position-sensitive Li-glass scintillator detector to $\alpha$-particles from collimated $^{241}$Am source scanned across the face has been measured. Scintillation light was read out by an 8 X pixel multi-anode photomultiplier and signal amplitude for each recorded every position on scan. is strongly dependent in general several pixels will register (a hit) above given threshold. effect this threshold hit multiplicity studied, with view optimize single-hit efficiency detector.
The response of a position-sensitive Li-glass based scintillation detector to focused beams 2.5 MeV protons and deuterons has been investigated. were scanned across the in 0.5 mm horizontal vertical steps perpendicular beams. Scintillation light was registered using an 8 by pixel multi-anode photomultiplier tube. signal amplitudes recorded for each on event-by-event basis. Several pixels generally considerable signals at beam location. number above set thresholds investigated, with...