A5028496727- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Nuclear Physics and Applications
- Noncommutative and Quantum Gravity Theories
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Neutrino Physics Research
- Astrophysical Phenomena and Observations
- Advanced Differential Geometry Research
- Quantum Mechanics and Applications
- Ionosphere and magnetosphere dynamics
- Relativity and Gravitational Theory
- Advanced Neuroimaging Techniques and Applications
- Quantum chaos and dynamical systems
- Cultural Heritage Materials Analysis
- Radiation Therapy and Dosimetry
- Advanced X-ray and CT Imaging
- High-pressure geophysics and materials
IRCCS Ospedale San Raffaele
2024
European Institute of Oncology
2021
Istituti di Ricovero e Cura a Carattere Scientifico
2021
Ripamonti
2021
University of Mississippi
2005-2021
LGL Electronics (Italy)
2012-2020
John Wiley & Sons (United States)
2019
National Museum in Kraków
2019
Max Planck Institute for Physics
2018
Politecnico di Milano
2006-2017
We associate to any quantum field propagating in the background metric of a black hole an effective density matrix whose statistical entropy can be interpreted as contribution total hole. By evaluating this simplified case, we show that general it expected finite and proportional area As by-product our calculation obtain expression for real Gaussian matrix.
One century after its formulation, Einstein's general relativity (GR) has made remarkable predictions and turned out to be compatible with all experimental tests. Most of these tests probe the theory in weak-field regime, there are theoretical reasons believe that GR should modified when gravitational fields strong spacetime curvature is large. The best astrophysical laboratories strong-field gravity black holes neutron stars, whether isolated or binary systems. We review motivations...
We propose that space-time at the smallest scales is in reality a causal set: locally finite set of elements endowed with partial order corresponding to macroscopic relation defines past and future. explore how Lorentzian manifold can approximate set, noting particular thereby defined effective dimensionality given vary length scale. Finally, we speculate briefly on quantum dynamics sets, indicating why an appropriate choice action reproduce general relativity classical limit.
In this work, we present experimental results of a prompt gamma camera for real-time proton beam range verification. The detection system features pixelated Cerium doped lutetium based scintillation crystal, coupled to Silicon PhotoMultiplier arrays, read out by dedicated electronics. uses knife-edge slit collimator produce 1D projection the path in target on detector. We designed detector provide high counting statistics and photo-detection efficiency rays several MeV. design favours could...
<?Pub Dtl=""?> We present the development of DSSC instrument: an ultra-high speed detector system for new European XFEL in Hamburg. The will be able to record X-ray images with a maximum frame rate 4.5 MHz. is based on silicon pixel sensor DEPFET as central amplifier structure and has detection efficiency close 100% X-rays from 0.5 keV up 10 keV. have size approximately 210 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The authors apply the Melnikov method for identifying chaos in near integrable systems to relativistic particle motion around a Schwarzschild black hole. They start by giving self-contained introduction together with some relevant background on dynamical systems. Then they show that was unstable circular orbits hole, and each one of these gives rise homoclinic orbit phase space, which tends t +or- infinity . Finally, use conclude that, under most periodic perturbations black-hole metric,...
This paper concerns sprinklings into Minkowski space (Poisson processes). It proves that there exists no equivariant measurable map from to spacetime directions (even locally). Therefore, if a discrete structure is associated sprinkling in an intrinsic manner, then the will not pick out preferred frame, locally or globally. implies discreteness of sprinkled causal set give rise ``Lorentz breaking'' effects like modified dispersion relations. Another consequence way associate finite-valency...
Abstract Sterile neutrinos appear in minimal extensions of the Standard Model particle physics. If their mass is keV regime, they are viable dark matter candidates. One way to search for sterile a laboratory-based experiment via analysis β -decay spectra, where new neutrino eigenstate would manifest itself as kink-like distortion spectrum. The objective TRISTAN project extend KATRIN setup with multi-pixel silicon drift detector system keV-scale signal. In this paper we describe requirements...
We present a monolithic CMOS charge preamplifier named "CUBE". It is specifically designed to be used with Silicon Drift Detectors (SDD). will show that the use MOSFET as input transistor allows superior noise performances at very short shaping times respect state-of-the-art externally connected JFET devices. achievable energy resolutions using 10mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> reference SDD different count-rates and...
In this work we present the results of experimental characterization Silicon Drift Detectors (SDDs) readout by CUBE preamplifiers for X-ray spectroscopy measurements. One specific goal was to characterize SDDs different sizes cooled at low temperature in view their use upgrade SIDDHARTA nuclear physics experiment. Beside target application, are also interest a more extended other applications. The have been designed as single units with square shape areas, 64 mm <sup...
CRONO is a new portable and easy reconfigurable macro X‐ray fluorescence scanner based on the energy dispersive technique, which has been specifically designed for in‐situ , fast, non‐invasive elemental mapping of polychrome surfaces. The main components are fully integrated into detection head includes an tube, large area silicon drift detector, microscope camera, two pointing lasers, Helium gas purging set, fast acquisition electronics. This very compact mounted motorized stages (with...
The notion of semiclassical states is first sharpened by clarifying two issues that appear to have been overlooked in the literature. Systems with linear and quadratic constraints are then considered group averaging procedure applied kinematical coherent obtain physical states. In specific examples considered, technique turns out be surprisingly efficient, suggesting it may well possible use structures analyze behavior an interesting class constrained systems.
The kaonic (3)He and (4)He X-rays emitted in the [Formula: see text] transitions were measured SIDDHARTA experiment. widths of 2p states determined to be text], respectively. Both results are consistent with theoretical predictions. width is much smaller than value by experiments performed 70's 80's, while was for first time.
ARDESIA is an SDD-based, X-ray spectrometer, optimized for synchrotron measurements that require high count rates (>1 Mcounts/s/channel) and good energy resolution (<130 eV of FHWM Mn-Kα line at optimum shaping time, ⩽ 200 short times). The main target applications are XRF XAFS techniques. detection module consists 2×2 pixel monolithic SDD (5 mm pitch) coupled with a 4-channel version the CUBE CMOS preamplifier. mechanical structure instrument has been realized to fit inside sample chamber...