A5106468194- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- CCD and CMOS Imaging Sensors
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Radiation Effects in Electronics
- Stochastic processes and statistical mechanics
- Cosmology and Gravitation Theories
- Particle accelerators and beam dynamics
- Astrophysics and Cosmic Phenomena
- Algorithms and Data Compression
- International Science and Diplomacy
- Silicon and Solar Cell Technologies
- Advanced Data Storage Technologies
University of Manchester
2016-2025
European Organization for Nuclear Research
2011-2024
University of Oxford
1995-2023
Lakehead University
2016-2022
Central China Normal University
2020
Institute of High Energy Physics
2020
University of Chinese Academy of Sciences
2020
Tsinghua University
2020
Peking University
2020
State Key Laboratory of Nuclear Physics and Technology
2020
The Vertex Locator (VELO) is a silicon microstrip detector that surrounds the proton-proton interaction region in LHCb experiment. performance of during first years its physics operation reviewed. system operated vacuum, uses bi-phase CO2 cooling system, and sensors are moved to 7 mm from LHC beam for data taking. stability these characteristic features described, details material budget given. calibration timing processing algorithms implemented FPGAs described. fully characterised. have...
Charm mixing and CP violation observables are examined in light of the recently reported evidence from LHCb for charm sector. If result is confirmed as being due to direct at 1% level, its effect will need be taken into account interpretation observables. The contributions indirect decay rate asymmetry difference ΔACP ratios effective lifetimes AΓ yCP considered here. Terms relevant future high-precision measurements which have been neglected previous literature identified.
For the planned luminosity upgrade of CERN LHC to sLHC new radiation hard technologies for tracking detectors are investigated. Corresponding increase, dose will be approximately a factor ten higher than currently installed in experiments. One option tolerant 3D silicon with columnar electrodes penetrating into bulk. This article reports results beam test measurements performed 3D-DDTC (Double-Sided, Double Type Column) strip detectors, where columns do not pass through detector completely....
A new ldquodouble sidedrdquo 3-D solid-state detector structure, intended to simplify the fabrication process, is proposed. In this electrode columns of different doping types are etched from opposite sides substrate, with neither set passing through full substrate thickness. The finite-element simulation package ISE-TCAD used determine performance structure. double-sided shows similar electrostatic behavior a standard detector, giving low depletion voltage and fast charge collection....
The LHCb Vertex Locator (VELO) is a silicon strip detector designed to reconstruct charged particle trajectories and vertices produced at the interaction region. During first two years of data collection, 84 VELO sensors have been exposed range fluences up maximum value approximately 45 × 1012 1 MeV neutron equivalent (1 neq). At operational sensor temperature −7 °C, average rate current increase 18 μA per fb−1, in excellent agreement with predictions. effective bandgap has determined using...
Three-dimensional (3D) silicon detectors offer advantages over standard planar devices as more radiation hard sensors. These and their applications in the upgrades of LHC experiments are discussed. 3D with a double-sided geometry have been fabricated very short strip similar inter-column spacing proposed for ATLAS pixel detector LHCb vertex locator upgrades. The irradiated up to fluence 2 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Three-dimensional (3D) silicon sensors offer potential advantages over standard planar for radiation hardness in future high energy physics experiments and reduced charge-sharing X-ray applications, but may introduce inefficiencies due to the columnar electrodes. These are probed by studying variations response across a unit pixel cell 55μm pitch double-sided 3D sensor bump bonded TimePix Medipix2 readout ASICs. Two complementary characterisation techniques discussed: first uses custom built...
Precise knowledge of the location material in LHCb vertex locator (VELO) is essential to reducing background searches for long-lived exotic particles, and identifying jets that originate from beauty charm quarks. Secondary interactions hadrons produced beam-gas collisions are used map VELO. Using this map, along with properties a reconstructed secondary its constituent tracks, $p$-value can be assigned hypothesis originates interaction. A validation procedure presented using photon...
Three-dimensional (3D) photodiode detectors offer advantages over standard planar photodiodes in a range of applications, including X-ray detection for synchrotrons and medical imaging. The principal advantage these sensors imaging is their low charge sharing between adjacent pixels, which could improve spatial spectral resolution. A 'double-sided' 3D detector has been bonded to Medipix2 single-photon-counting readout chip, tested monochromatic beam at the Diamond synchrotron. Tests...
Abstract The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I facilitates operation at higher luminosity and utilises full-detector information the collision rate, critically including use of vertex information. A new locator system, VELO Upgrade, been constructed. core element are double-sided pixelated hybrid silicon modules which operate in vacuum close to beam high radiation environment. construction quality assurance tests these described this paper. incorporate...
The planned luminosity upgrade of the CERN LHC to super (sLHC) requires investigation new radiation hard tracking detectors. Compared LHC, detectors must withstand a 5–10 times higher fluence. Promising options are planar silicon with n-side readout and in 3D technology, where columnar electrodes etched into substrate. This article presents beam test measurements performed n-in-p strip were irradiated different fluences, maximum fluence was <formula formulatype="inline"...