A5089689616- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atmospheric Ozone and Climate
- Particle accelerators and beam dynamics
- Spectroscopy and Laser Applications
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear physics research studies
- CCD and CMOS Imaging Sensors
- Muon and positron interactions and applications
- Advanced NMR Techniques and Applications
University of Liverpool
2018-2024
University of Oxford
2015-2021
SNO+ is a large liquid scintillator-based experiment located 2km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of 12m diameter acrylic vessel which will be filled with about 780 tonnes ultra-pure scintillator. Designed as multipurpose neutrino experiment, primary goal search for neutrinoless double-beta decay (0$\nu\beta\beta$) 130Te. In Phase I, detector loaded 0.3% natural tellurium, corresponding to nearly 800 kg 130Te, an expected...
Liquid Argon (LAr) is one of the most widely used scintillators in particle detection, due to its low cost, high availability and excellent scintillation properties. A large number experiments neutrino sector are based around using LAr or more Time Projection Chambers (TPCs), leading resolution three-dimensional reconstruction. In this paper, we review summarise a these Chamber (LArTPC) experiments, briefly describe specific technologies that they currently employ. This includes single phase...
The ARIADNE project is developing innovative optical readout technologies for two-phase liquid Argon time projection chambers (LArTPCs). Optical presents an exciting alternative to the current paradigm of charge readout. simple, scalable and cost effective. This paper first demonstration 3D TPC, using CF4 gas as a proof principle. Both cosmic rays Americium-241 alpha source have been imaged in 100 mbar CF4. A single-photon sensitive camera was developed by combining Timepix3 (TPX3) based...
Abstract Argon gas doped with 1% wavelength-shifter (CF 4 ) has been employed in an optical time projection chamber (OTPC) to image cosmic radiation. We present results obtained during the system commissioning, performed two stacked glass thick gaseous electron multipliers (THGEMs) and electron-multiplying charge coupled device (EMCCD camera) at 1 bar. Preliminary estimates indicate that combined gain was of order 10 6 (ph/e), producing sharp high-contrast raw images without resorting any...
The ARIADNE Experiment, utilising a 1-ton dual-phase Liquid Argon Time Projection Chamber (LArTPC), aims to develop and mature optical readout technology for large scale LAr detectors. This paper describes the characterisation, using cosmic muons, of Timepix3-based camera mounted on detector. raw data from are natively 3D zero suppressed, allowing straightforward event reconstruction, gallery reconstructed interaction events is presented. Taking advantage 1.6 ns time resolution readout,...
Optical readout of large scale dual-phase liquid Argon TPCs is an attractive alternative to charge and has been successfully demonstrated on a 2 × m active region within the CERN protoDUNE cold box. ARIADNE+ uses four Timepix3 cameras imaging S2 light produced by 16 novel, patent pending, glass THGEMs. takes advantage raw data coming natively 3D zero suppressed with 1.6 ns timing resolution. Three THGEM quadrants implement readouts in visible range through wavelength shifting, fourth...
This paper details a novel, patent pending, abrasive machining manufacturing process for the formation of sub-millimetre holes in THGEMs, with intended application gaseous and dual-phase TPCs. Abrasive favours non-ductile substrate such as glasses or ceramics. innovative allows unprecedented versatility THGEM substrates, electrodes, hole geometry pattern. Consequently, THGEMs produced via can be tailored specific properties, example: high stiffness, low total thickness variation,...
ARIADNE is a 1-ton (330 kg fiducial mass) dual-phase liquid argon (LAr) time projection chamber (TPC) featuring novel optical readout. Four electron-multiplying charge-coupled device (EMCCD) cameras are mounted externally, and these capture the secondary scintillation light produced in holes of thick electron gas multiplier (THGEM). Track reconstruction using this readout approach demonstrated. Optical has potential to be cost effective alternative charge future LArTPCs. In paper, technical...
There is a significant R\&D effort ongoing in the liquid argon (LAr) time projection chamber (TPC) community. Due to scintillation and ionisation properties of LAr, coupled with its low cost, it possible construct detectors immense fiducial volume at modest cost. It for this reason that LAr TPCs are fast becoming detector choice long baseline neutrino physics experiments. Using provide large targets required make direct observation interactions statistically reasonable prospect. Experiments...
This paper describes a new method for optical readout of Time Projection Chambers (TPCs), based on the Linearly Graded Silicon Photomultiplier (LG-SiPM). is single photon-sensitive detector with excellent timing and 2D position resolution developed at Fondazione Bruno Kessler, Trento (FBK). The LG-SiPM produces time-varying voltage signals that are used to reconstruct 3D energy ionisation tracks generated inside TPC. TPC in this work contained room-temperature CF4 gas pressure 100 mbar, two...
SNO+ is a multipurpose detector built to investigate neutrinoless double-beta decay and neutrino oscillations. The Scattering Module part of the calibration program, designed measure its scattering properties using laser pulses sent into at different wavelengths. We describe modules hardware outline general strategy for measuring length cut based analysis selecting direct in-beam photons Rayleigh scattered photons. verification process water-filled presented. efficiency found be > 60% with...
SNO+ is a multi-purpose neutrino detector with number of physics goals, one which to investigate the existence Neutrinoless Double Beta Decay. The potential rarity this process means that other radioactive decays occurring in and around can become major background sources. Two such backgrounds are β 214Bi 212Bi, followed by their respective daughters: 214Po 212Po. These daughters have relatively short half-lives, so these β-α coincidences form pileup events detector. methods presented here...
Optical readout of large scale dual-phase liquid Argon TPCs is an attractive alternative to charge and has been successfully demonstrated on a 2x2m active region within the CERN protoDUNE cold box. ARIADNE+ uses four Timepix3 cameras imaging S2 light produced by 16 novel, patent pending, glass THGEMs. takes advantage raw data coming natively 3D zero suppressed with 1.6ns timing resolution. Three THGEM quadrants implement in visible range through wavelength shifting, fourth featuring VUV...
Argon gas doped with 1% wavelength-shifter (CF$_4$) has been employed in an optical time projection chamber (OTPC) to image cosmic radiation. We present results obtained during the system commissioning, performed two stacked glass-THGEMs and EMCCD camera at 1 bar. Preliminary estimates indicate that combined gain was of order 10$^6$ (ph/e), producing sharp high-contrast raw images without resorting any filtering or post-processing. A first assessment impact pressurization showed no change...
ARIADNE is a 1-ton dual-phase Time Projection Chamber (TPC) with novel optical readout. The secondary scintillation light produced in the holes of THick Gas Electron Multiplier (THGEM) captured by Multiplying Charge Coupled Device (EMCCD) cameras or fast TPX3Cams mounted externally via glass viewports. Optical readout has potential to be cost effective alternative charge future LArTPCs. First ever images argon interactions from operation detector at CERN T9 testbeam are presented. 3D track...
The ARIADNE Experiment, utilising a 1-ton dual-phase Liquid Argon Time Projection Chamber (LArTPC), aims to develop and mature optical readout technology for large scale LAr detectors. This paper describes the characterisation, using cosmic muons, of Timepix3-based camera mounted on detector. raw data from are natively 3D zero suppressed, allowing straightforward event reconstruction, gallery reconstructed interaction events is presented. Taking advantage 1.6 ns time resolution readout,...