A. Candela
A5019509397- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Scientific Research and Discoveries
- Astronomy and Astrophysical Research
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Semiconductor materials and devices
- Quantum, superfluid, helium dynamics
- Muon and positron interactions and applications
- Atmospheric Ozone and Climate
- Advancements in Semiconductor Devices and Circuit Design
- High voltage insulation and dielectric phenomena
- Laser Design and Applications
- GNSS positioning and interference
- Superconducting and THz Device Technology
- Lightning and Electromagnetic Phenomena
- High-Energy Particle Collisions Research
- Electrical Fault Detection and Protection
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2010-2022
Technical University of Denmark
2018
Princeton University
2015
University of L'Aquila
1993
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
1993
University of Michigan
1993
California Institute of Technology
1993
Istituto Nazionale di Fisica Nucleare
1992
We present the results of a search for dark matter WIMPs in mass range below 20 GeV/c^2 using target low-radioactivity argon. The data were obtained DarkSide-50 apparatus at Laboratori Nazionali del Gran Sasso (LNGS). analysis is based on ionization signal, which time projection chamber fully efficient 0.1 keVee. observed rate detector 0.5 keVee about 1.5 events/keVee/kg/day and almost entirely accounted by known background sources. obtain 90% C.L. exclusion limit above 1.8 spin-independent...
We report the first results of DarkSide-50, a direct search for dark matter operating in underground Laboratori Nazionali del Gran Sasso (LNGS) and searching rare nuclear recoils possibly induced by weakly interacting massive particles (WIMPs). The detector is Liquid Argon Time Projection Chamber with (46.4+-0.7) kg active mass, operated inside 30 t organic liquid scintillator neutron veto, which turn installed at center 1 kt water Cherenkov veto residual flux cosmic rays. here null...
The DarkSide-50 direct-detection dark matter experiment is a dual-phase argon time projection chamber operating at Laboratori Nazionali del Gran Sasso. This paper reports on the blind analysis of (16,660+-270) kg d exposure using target low-radioactivity extracted from underground sources. We find no events in selection box and set 90% C.L. upper limit matter-nucleon spin-independent cross section 1.14E-44 cm^2 (3.78E-44 cm^2, 3.43E-43 cm^2) for WIMP mass 100 GeV/c^2 (1 TeV/c^2, 10 TeV/c^2).
We present new constraints on sub-GeV dark matter particles scattering off electrons in argon based an analysis of ionization signal data from the DarkSide-50 detector.
Liquid argon is a bright scintillator with potent particle identification properties, making it an attractive target for direct-detection dark matter searches. The DarkSide-50 search here reports the first WIMP results obtained using of low-radioactivity argon. detector, two-phase liquid time projection chamber, located at Laboratori Nazionali del Gran Sasso. underground shown to contain Ar-39 level reduced by factor (1.4 +- 0.2) x 10^3 relative atmospheric We report background-free null...
In this paper the design, construction and performance of lower part first supermodule MACRO detector is described.
Nuclear recoil events produced by neutron scatters form one of the most important classes background in WIMP direct detection experiments, as they may produce nuclear recoils that look exactly like interactions. In DarkSide-50, we both actively suppress and measure rate neutron-induced using our veto, composed a boron-loaded liquid scintillator detector within water Cherenkov detector. This paper is devoted to description veto system including structure, fundamentals event reconstruction...
The DarkSide staged program utilizes a two-phase time projection chamber (TPC) with liquid argon as the target material for scattering of dark matter particles. Efficient background reduction is achieved using low radioactivity underground well several experimental handles such pulse shape, ratio ionization over scintillation signal, 3D event reconstruction, and active neutron muon vetos. DarkSide-10 prototype detector has proven high light yield, which particularly important parameter it...
A Geant4-based Monte Carlo package named G4DS has been developed to simulate the response of DarkSide-50, an experiment operating since 2013 at LNGS, designed detect WIMP interactions in liquid argon. In process searches, DarkSide-50 achieved two fundamental milestones: rejection electron recoil background with a power ~10^7, using pulse shape discrimination technique, and measurement residual 39Ar contamination underground argon, ~3 orders magnitude lower respect atmospheric These results...
A scintillating bolometer based on a large cubic Li$_{2}$$^{100}$MoO$_4$ crystal (45 mm side) and Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at Canfranc underground laboratory Spain. The dual-readout detector is prototype of technology that will be used next-generation $0\nu2\beta$ experiment CUPID. measurements were performed 18 12 mK temperature pulse tube dilution refrigerator. This setup utilizes same as CUORE cryostat host CUPID so represents an...
Although the existence of dark matter is supported by many evidences, based on astrophysical measurements, its nature still completely unknown. One major candidate represented weakly interacting massive particles (WIMPs), which could in principle be detected through their collisions with ordinary nuclei a sensitive target, producing observable low-energy (<100 keV) nuclear recoils. The DarkSide program aims at WIPMs detection using liquid argon time projection chamber (LAr-TPC). In this...
We report on the cryogenic characterization of Red Green Blue - High Density (RGB-HD) SiPMs developed at Fondazione Bruno Kessler (FBK) as part DarkSide program dark matter searches with liquid argon time projection chambers. A dedicated setup was used to measure primary noise, correlated and gain varying temperatures. custom-made data acquisition system analysis software were precisely characterize these parameters. demonstrate that FBK RGB-HD low quenching resistance (RGB-HD-LR$_q$) can be...
The DarkSide-50 experiment at the Laboratori Nazionali del Gran Sasso is a search for dark matter using dual phase time projection chamber with 50 kg of low radioactivity argon as target. Light signals from interactions in are detected by system 38 photo-multiplier tubes (PMTs), 19 above and below TPC volume inside cryostat. We describe electronics which processes photo-multipliers, trigger identifies events interest, data-acquisition records data further analysis. include resistive voltage...
We reanalyze data collected with the DarkSide-50 experiment and recently used to set limits on spin-independent interaction rate of weakly interacting massive particles (WIMPs) argon nuclei an effective field theory framework. The dataset corresponds a total $(16660\ifmmode\pm\else\textpm\fi{}270)\text{ }\mathrm{kg}\text{ }\mathrm{d}$ exposure using target low-radioactivity extracted from underground sources. obtain upper couplings 12 leading operators in nonrelativistic systematic...
DarkSide-50 is a two phase argon TPC for direct dark matter detection which installed at the Gran Sasso underground laboratory, Italy. has 50-kg active volume and will make use of low in 39Ar. The inside an neutron veto made with boron-loaded high radiopurity liquid scintillator. 1000 m3 water Cherenkov muon veto. cryostat are assembled radon-free clean rooms to reduce radioactive contaminants. overall design aims background free exposure after selection cuts applied. expected sensitivity...
OPERA is part of the CNGS project and it an experiment dedicated to observation long-baseline nu <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mu</sub> into xmlns:xlink="http://www.w3.org/1999/xlink">tau</sub> oscillations through tau appearance. Resistive Plate Chambers (RPCs) with bakelite electrodes are used instrument 2 cm gaps between magnetized iron slabs two spectrometers. The RPC installation ended in may 2004 on first spectrometer...
This paper describes the design, fabrication, commissioning and use of a CALibration source Insertion System (CALIS) in DarkSide-50 direct dark matter search experiment. CALIS deploys radioactive sources into liquid scintillator veto to characterize detector response detection efficiency Liquid Argon Time Projection Chamber, surrounding 30 t organic neutron veto. It was commissioned September 2014 has been used successfully several gamma campaigns since then. A description hardware an...
DarkSide-50 is a detector for dark matter candidates in the form of weakly interacting massive particles. It utilizes liquid argon time projection chamber inner main detector, surrounded by scintillator veto (LSV) and water Cherenkov (WCV). The LSV WCV act as neutron cosmogenic muon detectors DarkSide-50. This paper describes electronics data acquisition system used these two detectors. made custom built front end commercial National Instruments high speed digitizers. electronics, DAQ,...