A5028269370- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Big Data Technologies and Applications
- Nuclear Physics and Applications
- Advanced Data Storage Technologies
- Lung Cancer Diagnosis and Treatment
- Hepatocellular Carcinoma Treatment and Prognosis
- Spacecraft and Cryogenic Technologies
- Superconducting Materials and Applications
- Calibration and Measurement Techniques
- Urban and sociocultural dynamics
- Electrostatic Discharge in Electronics
European Organization for Nuclear Research
2019-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2023-2024
University of Milan
2023-2024
A. Alikhanyan National Laboratory
2024
SR Research (Canada)
2024
Federación Española de Enfermedades Raras
2024
Weizmann Institute of Science
2010-2023
The University of Adelaide
2018-2023
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Udine
2023
Centre de physique des particules de Marseille
2023
Radiation-induced proportional-electroluminescence UV signals, emitted from the holes of a Thick Gas Electron Multiplier (THGEM) electrode immersed in liquid xenon, were recorded with PMT for first time. Significant photon yields observed gamma photons and alpha particles using 0.4 mm thick 0.3 diameter holes; at 2 kV across THGEM yield was estimated to be ∼ 600 photons/electron over 4π. This may pave way towards realization novel single-phase noble-liquid radiation detectors incorporating...
The time-dependent gain variation of detectors incorporating Thick Gas Electron Multipliers (THGEM) electrodes was studied in the context charging-up processes electrode's insulating surfaces. An experimental study performed to examine model-simulation results aforementioned phenomena, under various conditions. indicate that a stable detector's environment, stabilization process is mainly affected by surfaces caused avalanche charges. transient effect, occurring during initial operation...
In this work we discuss the mechanism behind large electroluminescence signals observed at relatively low electric fields in holes of a Thick Gas Electron Multiplier (THGEM) electrode immersed liquid xenon. We present strong evidence that scintillation light is generated xenon bubbles trapped below THGEM holes. The process shown to be remarkably stable over months operation, providing—under specific thermodynamic conditions—energy resolution similar dual-phase experiments. may serve as basis...
We discuss recent advances in the development of cryogenic gaseous photomultipliers (GPM), for possible use dark matter and other rare-event searches using noble-liquid targets. present results from a 10 cm diameter GPM coupled to dual-phase liquid xenon (LXe) TPC, demonstrating—for first time—the feasibility recording both primary (``S1'') secondary (``S2'') scintillation signals. The detector comprised triple Thick Gas Electron Multiplier (THGEM) structure with cesium iodide photocathode...
In-beam evaluation of a fully-equipped medium-size 30 × cm2 Resistive Plate WELL (RPWELL) detector is presented. It consists here single element gas-avalanche multiplier with Semitron ESD225 resistive plate, 1 readout pads and APV25/SRS electronics. Similarly to previous results small prototypes, stable operation at high detection efficiency (> 98%) low average pad multiplicity (∼ 1.2) were recorded 150 GeV muon high-rate pion beams, in Ne/(5%CH4), Ar/(5%CH4) Ar/(7%CO2). This an important...
THGEM investigations in Ne mixtures focused so far atmospheric pressures. However, the applications of GPMs operating at cryogenic temperatures result operation neon with gas densities higher than those pressure room temperature. In addition, X-ray and charged particle detection would benefit from densities. this work we studied temperature Single Double-THGEM detectors Ne/CF4 pressures up to 3bar. Measurements soft X-rays obtained gains 7 × 104 3 a Double-THGEM, 1bar 3bar (95:5),...
Gamma-ray and fast-neutron imaging was performed with a novel liquid xenon (LXe) scintillation detector read out by Gaseous Photomultiplier (GPM). The 100 mm diameter prototype comprised capillary-filled LXe converter/scintillator, coupled to triple-THGEM imaging-GPM, its first electrode coated CsI UV-photocathode, operated in Ne/5%CH4 cryogenic temperatures. Radiation localization 2D derived from scintillation-induced photoelectron avalanches, measured on the GPM's segmented anode....
Dual-phase noble-liquid TPCs are presently the most sensitive instruments for direct dark matter detection. Scaling up existing ton-scale designs to multi-ton regime may prove be technologically challenging. This includes both large-area coverage with affordable high-QE UV-photon detectors, and maintaining high precision in measuring charge light signals of rare events keV-scale energy depositions. We present our recent advances two complementary approaches these problems: cryogenic gaseous...
This work presents the first results dealing with THGEMs coupled to submillimetric multiplication gaps, operated in an atmospheric pressure of Ne/CF4. The experimental studies done so far a THGEM gaps achieved charge-gains 4 × 104 and 1 105 Ne/CF4 (95:5), for 0.4 mm 0.8 respectively, values that are one order magnitude higher than those obtained single-THGEM configuration approximately half from cascaded-THGEM configuration. present evaluate performance operation terms charge-gain...
A study of the localization properties a single-element Resistive Plate WELL (RPWELL) detector is presented. The comprises single-sided THick Gaseous Electron Multiplier (THGEM) coupled to segmented readout anode through doped silicate-glass plate 1010 Ω⋅cm bulk resistivity. Operated in ambient \nech gas, has been investigated with 150 GeV muons at CERN-SPS. Signals induced resistive on strips were recorded APV25/SRS electronics. experimental results are compared that Monte Carlo...
This work presents the experimental measurements obtained for UV-induced photo-electron extraction efficiency from a CsI photocathode into He with CF4 and CH4 gas mixtures. A 1000Å was deposited on gold plated THGEM conversion. Charge-gain were Single-THGEM detector operating in these mixtures using continuous UV lamp of photo-electrons. Charge-gains excess 105 containing percentages quencher higher than 20% while achieved ∼ 50% He/CF4 30% He/CH4. Single photon electron also performed to...
Abstract Digital and Semi-Digital Hadronic Calorimeters ((S)DHCAL) were suggested for future Colliders as part of the particle-flow concept. Though studied mostly with Resistive Plate Chambers (RPC), studies focusing on Micro-Pattern Gaseous Detector (MPGD)-based sampling elements have shown potential advantages using such techniques. In 2018, eight 48x48 cm 2 based resistive Micromegas WELL (RPWELL) technologies assembled. They tested within a small MPGD-based SDHCAL prototype incorporating...
The coupling of a THGEM to an induction region having thickness below 1 mm allows the application intense electric fields, resulting in more efficient extraction avalanche electrons into anode electrode and extension charge amplification region. In present work, we investigate performance such configuration, operating Ne-5% CH4 Ar-20% mixtures, terms gain characteristics energy resolution for 5.9 keV X-rays. Gains above 105 can be achieved both mixtures without jeopardizing gaps 0.8 0.5 mm,...
A system is described for in-situ monitoring of VUV- photocathode response in gas-avalanche and noble-liquid photon detectors. It consists a VUV light source, optical-fiber-based optics reference photodiode. The permits real-time detector photosensitivity variations due to atmospheric conditions, impurities or aging effects by photons avalanche ions. We present the system's parameters such as, spectral response, transmission operation photodiode at cryogenic temperatures. demonstrate...