A5034478185- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Cold Atom Physics and Bose-Einstein Condensates
Institut Laue-Langevin
2015-2022
University of Coimbra
2019
Université Grenoble Alpes
2015
Centre National de la Recherche Scientifique
2013
Institut de Physique Théorique
2013
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2013
We consider different methods to probe the chameleon scalar field with slow neutrons. Chameleons modify potential of bouncing neutrons over a flat mirror in terrestrial gravitational field. This induces shift energy levels which could be detected current experiments like GRANIT. between parallel plates have profile is bubblelike and would phase interferometric experiments. show that this new method detection competitive neutron one, hopefully providing an efficient chameleons when strongly...
The GRANIT facility is a follow-up project, which motivated by the recent discovery of gravitational quantum states ultracold neutrons. goal project to approach ultimate accuracy in measuring parameters such and also apply this phenomenon related experimental techniques broad range applications particle physics as well surface nanoscience studies. We overview current status facility, test measurements, nearest prospects.
We present characterization results of a neutron Anger camera based on lithium-6 loaded cerium activated silicate glass scintillator (33.3 × 33.3 1 mm3) and an array 64 silicon photomultipliers. Reconstruction the scintillation events is performed with statistical method, implemented graphics processing unit (GPU). demonstrate that light response model detector can be obtained from flood irradiation calibration data using unsupervised iterative procedure. The useful field view 28 mm2....
A detector upgrade was carried out on the PLATYPUS instrument dedicated to neutron reflectometry at Australian Nuclear Science and Technology Organisation (ANSTO). The new detector, developed in framework of a research collaboration between ILL ANSTO, is based Monoblock Aluminium Multi-tube (MAM) design already use several reflectometers SANS instruments ILL. This article provides technical description mechanical read-out electronics its commissioning instrument. main performance parameters...
A time-of-flight device was developed to characterize wavelength distribution and uniformity of a cold neutron beam. This is very compact -- the distance flight $60$ cm but achieves high resolution intrinsic $\Delta \lambda/\lambda=2.4\cdot 10^{-3}$ at $\lambda=0.89$ nm. The composed fixed slit, disk rotating up $216$ Hz detector with thin spherical conversion layer chopper slit in its focus. accepts complete angular divergence initial efficiency detection constant over area. Systematic...
The bouncing neutron is one of the rare system where gravity can be studied in a quantum framework. To this end it crucial to able select some specific gravitational state (GQS). GRANIT apparatus first physics experiment connected superthermal helium UCN source. We report on methods developed for instrument showing how GQS favored using step between mirrors and an absorbing slit. explore increase separation efficiency by increasing absorber roughness amplitude, find feasible but requires...