L. P. Rignanese
A5086697194- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Radiation Therapy and Dosimetry
- X-ray Spectroscopy and Fluorescence Analysis
- CCD and CMOS Imaging Sensors
- Scientific Research and Discoveries
- Superconducting Materials and Applications
- Spacecraft and Cryogenic Technologies
- Advanced X-ray and CT Imaging
- Planetary Science and Exploration
- Inorganic Fluorides and Related Compounds
- Intensive Care Unit Cognitive Disorders
- Advanced Chemical Physics Studies
- COVID-19 diagnosis using AI
- Advanced Optical Sensing Technologies
- Astrophysics and Cosmic Phenomena
- Photocathodes and Microchannel Plates
- High-Energy Particle Collisions Research
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2015-2024
Istituto Nazionale di Fisica Nucleare
2016-2023
University of Bologna
2014-2023
Enrico Fermi Center for Study and Research
2020-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2018
Politecnico di Milano
2018
Zambon (Italy)
2016
Abstract The FAMU experiment aims to measure for the first time hyperfine splitting of muonic hydrogen ground state. From this measurement proton Zemach radius can be derived and will shed light on determination charge radius. In paper, we describe scientific goal, method detailed preparatory work. This includes outcome preliminary measurements, subsequent refined simulations evaluation expected results. experimental setup being built performed at RAL laboratory muon facility is also described.
The high precision measurement of the hyperfine splitting muonic-hydrogen atom ground state with pulsed and intense muon beam requires careful technological choices both in construction a gas target detectors. In June 2014, pressurized FAMU experiment was exposed to low energy at RIKEN RAL facility. objectives test were characterization target, hodoscope X-ray apparatus consisted X-rays detectors made purity Germanium Lanthanum Bromide crystals. this paper experimental setup is described...
We report the experimental determination of collision-energy dependence muon transfer rate from ground state muonic hydrogen to oxygen at near-thermal energies. A sharp increase by nearly an order magnitude in energy range 0--70 meV was found that is not observed other gases. The results set a reliable reference for quantum-mechanical calculations low-energy processes with exotic atoms and provide firm measurement hyperfine splitting Zemach radius proton FAMU collaboration.
Abstract The ePIC experiment at the future Electron-Ion Collider (EIC) aims to use silicon photomultipliers (SiPMs) as photodetector technology for dual-radiator ring-imaging Cherenkov detector (dRICH). Despite their advantages this low light application and insensitivity high magnetic fields, SiPMs are sensitive radiation require rigorous testing ensure that single-photon counting capabilities dark count rate kept under control over years of operation. presented results show successful a...
Abstract In this work we will document the design and performances of a SiPM-based photo-detector with surface area 100 cm 2 conceived to operate as replacement for PMTs. The signals from 94 SiPMs are summed up produce an aggregated output that exhibits in liquid nitrogen dark count rate (DCR) lower than cps over entire surface, signal noise ratio better 13, timing resolution 5.5 ns. module feeds about 360 mW at 5 V dynamic range excess 500 photo-electrons on Ω differential line. unit can...
SiPMs are the baseline photodetector technology for dual-radiator Ring-Imaging Cherenkov (dRICH) detector of ePIC experiment at future Electron-Ion Collider (EIC). offer significant advantages being cheap devices, highly efficient and insensitive to high magnetic field (∼ 1 T) expected location sensors in experiment. However, they not radiation tolerant one has test whether increase dark count rate (DCR) can be mitigated maintain single-photon performance with current SiPM a moderately...
The aim of the FAMU (Fisica degli Atomi Muonici) experiment is to realize first measurement hyperfine splitting (hfs) in 1S state muonic hydrogen Δ Ehfs1S, by using RIKEN-RAL intense pulsed muon beam and a high-energy mid-infrared tunable laser. This requires detailed study transfer mechanism at different temperatures hence epithermal states system. experimental setup involves cryogenic pressurized gas target detection system based on silicon photomultipliers-fiber hodoscopes high purity...
Abstract In this paper, different Silicon PhotoMultiplier (SiPM) sensors have been tested with charged particles to characterize the Cherenkov light produced in sensor protection layer. A careful position scan of SiPM response has performed prototypes, confirming large number firing cells and proving almost full efficiency, filling factor essentially negligible. This study also allowed us time resolution such devices as a function cells, reaching values below 20 ps. These measurements...
A future compact and modular X gamma-ray spectrometer (XGS) has been designed a series of prototypes have developed tested. The experiment envisages the use CsI scintillator bars read out at both ends by single-cell 25 mm2 Silicon Drift Detectors. Digital algorithms are used to discriminate between events absorbed in layer (lower energy rays) crystal (higher rays gamma-rays). prototype characterization is shown design for experiments with possible astrophysical applications (e.g. THESEUS...
The FAMU experiment is devoted to the high precision measurement of hyperfine splitting muonic-hydrogen atom ground state using a pulsed and intense muon beam; it requires careful technological choices both in construction gas target detectors. In last three years, cryogenic was developed used for experimental sessions, with low energy beam (55–65 MeV), at RIKEN-RAL (U.K.) facility. At same time, eight LaBr3(Ce) based detectors have been be accommodated circular support surrounding target....
Abstract In this paper, evidence that the increased response of SiPM sensors to passage charged particles is related mainly Cherenkov light produced in protection layer reported. The and timing properties with different layers have been studied.
The FAMU experiment aims to accurately measure the hyperfine splitting of ground state muonic hydrogen atom. A measurement transfer rate muons from heavier gases is necessary for this purpose. In June 2014, within a preliminary experiment, pressurized gas-target was exposed pulsed low-energy muon beam at RIKEN RAL facility (Rutherford Appleton Laboratory, U.K.). main goal test characterization both noise induced by and X-ray detectors. apparatus, some extent rudimental, has served admirably...