A5063004261- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Scientific Research and Discoveries
- Mechanical and Optical Resonators
- Advanced MRI Techniques and Applications
- Nuclear physics research studies
- Physics of Superconductivity and Magnetism
- Magnetic confinement fusion research
- Fusion materials and technologies
- Advanced Condensed Matter Physics
- Radiation Therapy and Dosimetry
- Experimental and Theoretical Physics Studies
- Quantum chaos and dynamical systems
- Advanced X-ray Imaging Techniques
- High-Energy Particle Collisions Research
- Advanced Fiber Laser Technologies
- Magnetic Field Sensors Techniques
Heinz Maier-Leibnitz Zentrum
2008-2021
Technical University of Munich
2007-2021
Forschungszentrum Jülich
2002-2019
Kurchatov Institute
1996-2004
In this paper we show a first approach to the three dimensional reconstruction of spatially resolved neutron depolarization data. We will measurements with position sensitive CCD detector on longitudinal polarization analysis setup using 3He polarizers and analyzers installed at radiography beamline ANTARES FRM II, Munich. A tomographic data acquired an inhomogeneous Pd1−xNix sample shows that method is powerful tool identify regions different magnetic properties inside sample.
3D vector polarisation analysis called also SNP (Spherical Neutron Polarimetry) is a powerful method for the detailed investigation of complex magnetic structures. The precise control incoming and scattered neutron polarisations essential this technique. Here we show an instrumental setup, that was recently implemented on new single crystal diffractometer POLI-HEiDi at FRM II performing experiments using two 3He spin filters production polarisation. design optimisation procedure used filter...
Gaseous 3He neutron spin filters (NSF) are simple transmission devices, with predictable characteristics, that do not require any special optical adjustments on a beam. Since polarized nuclei of possess very high spin-dependent absorption efficiency over wide range energies, the NSF can be used as broadband polarizer or analyzer, possibility to optimize its for nearly all wavelengths. In 2005 facility large-scale production highly gas, HELIOS, was put into operation at FRM-II.
In the paper we present results obtained for effect of rotation (ROT) in angular distribution prompt $\ensuremath{\gamma}$ rays from fission $^{235}\mathrm{U}$ induced by monochromatic polarized ``warm'' neutrons (${E}_{n}$ = 60 meV). The polarization vector direction is determined at target position order to correctly determine sign measured effect. asymmetry parameter was found be equal...
Abstract In this article, we describe a neutron polarizer for new time-of-flight spectrometer with the polarization analysis TOPAS. This instrument will use convergent focused incoming beam of thermal neutrons energies up to 150 meV (wavelength down 0.74Å). The employs high opacity 3 He spin filter continuous provided by two laser array bars frequency narrowed an ultra-compact volume Bragg grating. system was successfully prototyped, and tested. course first experimental test at polarized...
The TRI and ROT asymmetries in fission of heavy nuclei have been extensively studied during more than a decade. effects were first discovered the ternary series experiments performed at ILL reactor (Grenoble) by collaboration Russian European institutes, carefully measured for number fissioning nuclei. Later on, effect has observed emission prompt gamma rays neutrons 235 U 233 U, although its value was an order magnitude smaller α-particle from fission. All so far are done with cold...
Originating from the demand for obtaining depth‐resolved magnetization profiles thin films and heterostructures, polarized neutron reflectometry (PNR) has developed into a unique research tool, which also finds application in analysis of superconducting or soft matter films. While certain situ sample environments such as gas‐loading humidity cells were quickly realized after PNR first emerged, preparing growing magnetic directly beam could only be recent years. Herein, dedicated insight is...
The experience in manufacturing and testing of neutron multilayer structures, interference filters, is described. Construction a gravity UCN spectrometer based on the use such devices also reported. Some results test experiment dispersion law performed with are presented. Among them resonant mode mixing effect due to scattering by roughness. possibilities new experiments similar method investigated.
We describe an experimental setup used to measure the T-odd asymmetry effects for prompt fission neutrons and γ-rays in binary of some heavy nuclei induced by polarized with resonance energy. The overall as well details design performance key components like fragment detectors, neutron γ electronics data acquisition processing system are presented. on beam line POLI FRM II reactor (Garching, Germany), characteristics, polarization measurements described, too.
A new design of a magnetostatic cavity for housing neutron spin filter with spin-polarized 3He gas at instrument is proposed. Movable components made soft magnetic materials allow an accurate tuning the homogeneity holding field within and, thus, ensure long relaxation time. In addition, this enables to correct in presence external source near cavity, which usually case experiments polarization analysis.
We propose geometric tools that are suitable for studying the behavior of a billiard trajectory in homogeneous force field. Two examples considered: vertical plane with an open top and parabolic or right angle boundary at bottom. In either case, we obtain equations describe envelope trajectory. These good agreement those found earlier use other calculation methods. addition, present some new properties trajectories. show case sequence impact points can be easily constructed by multiple...