M. Romagnoni
A5082792045- Crystallography and Radiation Phenomena
- Particle physics theoretical and experimental studies
- Advanced X-ray Imaging Techniques
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear materials and radiation effects
- Particle Accelerators and Free-Electron Lasers
- Quantum Chromodynamics and Particle Interactions
- Muon and positron interactions and applications
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Superconducting and THz Device Technology
- Liver Disease Diagnosis and Treatment
- Computational Physics and Python Applications
- Advanced Electron Microscopy Techniques and Applications
- Hepatitis C virus research
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Hepatitis B Virus Studies
- Dialysis and Renal Disease Management
- High-Energy Particle Collisions Research
- Microstructure and mechanical properties
- Urinary Bladder and Prostate Research
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2017-2025
University of Ferrara
2017-2024
Aix-Marseille Université
2023-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2024
Roma Tre University
2024
Centre National de la Recherche Scientifique
2023-2024
University of Milan
1966-2023
European X-Ray Free-Electron Laser
2023
European Organization for Nuclear Research
2023
University of Insubria
2022
The high-luminosity requirement in future lepton colliders imposes a need for high-intensity positron source. In the conventional scheme, beams are obtained by conversion of bremsstrahlung photons into electron-positron pairs through interaction between high-energy electron beam and high-Z amorphous target. One method to enhance number produced positrons is boosting incident power. However, maximum heat load thermo-mechanical stresses bearable target severely limit power electrons. To...
A sample of 3984 candidates the K+→π+γγ decay, with an estimated background 291±14 events, was collected by NA62 experiment at CERN during 2017–2018. In order to describe observed di-photon mass spectrum, next-to-leading contribution in chiral perturbation theory found be necessary. The decay branching ratio full kinematic range is measured (9.61±0.17)×10−7. first search for production and prompt axion-like particle gluon coupling process K+→π+a, a→γγ also reported.
Coherent elastic neutrino-nucleus scattering and low-mass dark matter detectors rely crucially on the understanding of their response to nuclear recoils. We report first observation a recoil peak at around 112 eV induced by neutron capture. The measurement was performed with CaWO_{4} cryogenic detector from NUCLEUS experiment exposed ^{252}Cf source placed in compact moderator. identify expected structure single-γ de-excitation ^{183}W 3σ its origin capture 6σ significance. This result...
Cryogenic phonon detectors are adopted in experiments searching for dark matter interactions or coherent elastic neutrino-nucleus scattering, thanks to the low energy threshold they can achieve. The phonon-mediated sensing of particle passive silicon absorbers has been demonstrated with kinetic inductance (KIDs). Targets neutron number larger than silicon, however, feature a higher cross section neutrinos, while multi-target would provide stronger evidence possible signal. In this work, we...
A setup of two bent crystals and a fixed target in the CERN Large Hadron Collider (LHC) could enable study magnetic (MDM) electric (EDM) dipole moments short-lived charm baryons with unprecedented accuracy. At core experiment is crystal which particles interest, such as $\Lambda_c^+$ $\Xi_c^+$ particles, can be confined between crystalline planes, inducing deflection that enforces spin precession measurable by detectors. The requires inside LHC vacuum to create charmed baryons. first serves...
Although inorganic scintillators are widely used in the design of electromagnetic calorimeters for high-energy physics and astrophysics, their crystalline nature and, hence, lattice orientation generally neglected detector design. However, general, features field experienced by particles impinging on a crystal at small angle with respect to axis affect interaction mechanisms. In particular, case electrons/photons (10 GeV) or higher high- Z an ≲ 1 mrad, so-called strong regime is attained:...
The design of next-generation calorimeters for accelerator-borne experiments at the intensity frontier poses unprecedented challenges with regard to timing performance and radiation resistance, while rivaling current state art in terms energy resolution. A significant role may be played by quantum dots, i.e., light-emitting semiconductor nanocrystals high yield rather easy manufacture. Quantum dots can cast into an optically transparent polymer matrix obtain nanocomposite scintillators,...
We report the observation of steering 855 MeV electrons by bent silicon and germanium crystals at MAinzer MIkrotron. 15 $\mu $m long crystals, along (111) planes, were exploited to investigate orientational coherent effects. By using a piezo-actuated mechanical holder, which allowed remotely change crystal curvature, it was possible study capability planar channeling volume reflection vs. curvature radius atomic number, Z. For silicon, efficiency exceeds 35 %, record for negatively charged...
We measured a considerable increase of the emitted radiation by $120\text{ }\text{ }\mathrm{GeV}/c$ electrons in an axially oriented lead tungstate scintillator crystal, if compared to case which sample was not aligned with beam direction. This enhancement resulted from interaction particles strong crystalline electromagnetic field. The data collected at external lines CERN Super Proton Synchrotron were critically Monte Carlo simulations based on Baier-Katkov quasiclassical method,...
Electromagnetic dipole moments of short-lived particles are sensitive to physics within and beyond the Standard Model particle but have not been accessible experimentally date. To perform such measurements it has proposed exploit spin precession channeled in bent crystals at LHC. Progress that enables first measurement charm baryon is reported. In particular, design characterization on beam silicon germanium crystal prototypes, optimization experimental setup, advanced analysis techniques...
The characterisation of fast phenomena at the microscopic scale is required for understanding catastrophic responses materials to loads and shocks, processing by optical or mechanical means, processes involved in many key technologies such as additive manufacturing microfluidics, mixing fuels combustion. Such are usually stochastic nature occur within opaque interior volumes samples, with complex dynamics that evolve all three dimensions speeds exceeding meters per second. There therefore a...
Crilin (Crystal Calorimeter with Longitudinal Information) is a semi-homogeneous, longitudinally segmented electromagnetic calorimeter based on high- Z , ultra-fast crystals UV-extended SiPM readout. The design has been proposed as candidate solution for both future Muon Collider barrel ECAL and the Small Angle of HIKE experiment. As part development program, we have carried out beam tests small (10 × 10 40 mm 3 ) lead fluoride (PbF 2 tungstate (PbWO 4 PWO-UF) 120 GeV electrons at CERN SPS...
Abstract We have observed a significant enhancement in the energy deposition by 25– $$100~\textrm{GeV}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>100</mml:mn> <mml:mspace /> <mml:mtext>GeV</mml:mtext> </mml:mrow> </mml:math> photons $$1~\textrm{cm}$$ <mml:mn>1</mml:mn> <mml:mtext>cm</mml:mtext> thick tungsten crystal oriented along its $$\langle 111 \rangle $$ <mml:mo>⟨</mml:mo> <mml:mn>111</mml:mn> <mml:mo>⟩</mml:mo> lattice axes. At , this enhancement,...
A bstract The NA62 experiment at CERN, designed to study the ultra-rare decay K + → π $$ \nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> , has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a volume beginning 80 m downstream. search for decaying flight μ − pairs is reported, based sample of 1 . 4 × 10 17...
X-ray multi-projection imaging (XMPI) has the potential to provide rotation-free 3D movies of optically opaque samples. The absence rotation enables superior speed and preserves fragile sample dynamics by avoiding centrifugal forces introduced conventional rotary tomography. Here, we present our XMPI observations at ID19 beamline (ESRF, France) in melted aluminum with 1000 frames per second 8 µ m resolution projection using full dynamical range detectors. Since is a method under development,...
We observed a substantial increase of the scintillation light output lead tungstate (PbWO$_4$) at small incidence angle with respect to two main lattice axes. This reflects acceleration electromagnetic shower development that occurs in crystalline Strong Field. measured generated by $120$-$\mathrm{GeV}$ electrons and $10$-$100$-$\mathrm{GeV}$ $\gamma$ rays on thick samples. result deepens knowledge mechanisms crystal scintillators could pave way innovative accelerator- space-borne calorimeters.
OBJECTIVE--To compare the effectiveness and safety of spontaneous ascites filtration reinfusion total paracentesis plus intravenous albumin infusion in cirrhotic patients with tense ascites. DESIGN--Randomised trial two treatments. SETTING--Teaching hospital district general Milan. PATIENTS--45 consecutive recurrent urinary sodium excretion rate less than 20 mmol/day. 35 fulfilled admission criteria completed study. 17 received 18 infusion. MAIN OUTCOME MEASURES--Body weight; volume; serum...
This paper is devoted to an experimental study of focusing and defocusing positively charged particle beams with the help specially bent single crystals. Four crystals have been fabricated for this purpose. The studies performed at CERN SPS in $400\text{ }\text{ }\mathrm{GeV}/c$ proton $180\text{ pion beams. results measurements beam envelopes are presented. rms size horizontal profile focus was 5--8 times smaller than exit measured focal lengths were 4--21 m. good agreement calculations....
Abstract We report on the measurements of spectra gamma radiation generated by 855 MeV electrons in bent silicon and germanium crystals at MAMI (MAinzer MIkrotron). The were 15 $$\upmu \text {m}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>μ</mml:mi><mml:mtext>m</mml:mtext></mml:mrow></mml:math> thick along beam direction to ensure high deflection efficiency. Their (111) crystalline planes means a piezo-actuated mechanical holder, which allowed remotely change...
We introduce BULLKID, a phonon detector consisting of an array dices acting as particle absorbers sensed by multiplexed Kinetic Inductance Detectors (KIDs). The are carved in thick crystalline wafer and form monolithic structure. carvings leave thin common disk intact the wafer, both holder for substrate KID lithography. prototype presented consists 64 5.4 × 5 mm3 3˝ diameter, mm silicon with 0.5 thick, hosting 60 nm patterned aluminum layer. resulting is highly segmented but avoids use...