H. Pernegger
A5019282173- 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
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- CCD and CMOS Imaging Sensors
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Diamond and Carbon-based Materials Research
- Radiation Effects in Electronics
- Distributed and Parallel Computing Systems
- Advancements in Semiconductor Devices and Circuit Design
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Ion-surface interactions and analysis
- Advanced Data Storage Technologies
- Advanced Semiconductor Detectors and Materials
- High-pressure geophysics and materials
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- advanced mathematical theories
- Stochastic processes and statistical mechanics
- Particle Accelerators and Free-Electron Lasers
European Organization for Nuclear Research
2016-2025
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2014-2024
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Udine
2014-2024
Institute of High Energy Physics
1993-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2014-2024
University of Göttingen
2020-2024
A. Alikhanyan National Laboratory
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2014-2023
University of California, Santa Cruz
2023
For optimal operation of chemical-vapor deposition (CVD) diamonds as charged particle detectors it is important to have a detailed understanding the charge-carrier transport mechanism. This includes determination electron and hole drift velocities function electric field, charge carrier lifetimes, well effective concentration space in detector bulk. We use transient-current technique, which allows direct these parameters single measurement, investigate properties sample single-crystal CVD...
This Rapid Communication describes the measurement of elliptic flow for charged particles in Au+Au collisions at $\sqrt{{s}_{\mathit{NN}}}=200$ GeV using PHOBOS detector Relativistic Heavy Ion Collider. The measured azimuthal anisotropy is presented over a wide range pseudorapidity three broad collision centrality classes first time this energy. Two distinct methods extracting signal were used to reduce systematic uncertainties. falls sharply with increasing $|\ensuremath{\eta}|$ 200 all...
CMOS pixel sensors with a small collection electrode combine the advantages of sensor capacitance fully monolithic design. The results in large ratio signal-to-noise and low analogue power consumption, while design reduces material budget, cost production effort. However, electric field corners such an increased charge time, that makes efficient operation after irradiation timing resolution order nanoseconds challenging for sizes larger than approximately forty micrometers. This paper...
The PHOBOS experiment has measured the charged particle multiplicity at mid-rapidity in Au+Au collisions sqrt(s_NN) = 200 GeV as a function of collision centrality. Results on dN/deta(eta<1) divided by number participating nucleon pairs, , are presented . As was found from similar data 130 GeV, can be equally well described parton saturation models and two-component fits which include contributions that scale Npart binary collisions, Ncoll. We compare two energies means ratio R(200/130)...
The upgrade of the ATLAS [1] tracking detector for High-Luminosity Large Hadron Collider (LHC) at CERN requires novel radiation hard silicon sensor technologies. Significant effort has been put into development monolithic CMOS sensors but it a challenge to combine low capacitance sensing node with full depletion sensitive layer. Low brings analog power. Depletion layer causes signal charge be collected by drift sufficiently fast separate hits from consecutive bunch crossings (25 ns LHC) and...
Depleted Monolithic Active Pixel Sensor (DMAPS) prototypes developed in the TowerJazz 180 nm CMOS imaging process have been designed context of ATLAS upgrade Phase-II at HL-LHC. The pixel sensors are characterized by a small collection electrode (3 $\mu$m) to minimize capacitance, size ($36.4\times 36.4$ $\mu$m), and produced on high resistivity epitaxial p-type silicon. design targets radiation hardness $1\times10^{15}$ 1 MeV n$_{eq}$/cm$^{2}$, compatible with outermost layer ITK detector....
The upgrade of the ATLAS tracking detector (ITk) for High-Luminosity Large Hadron Collider at CERN requires development novel radiation hard silicon sensor technologies. Latest developments in CMOS processing offer possibility combining high-resistivity substrates with on-chip high-voltage biasing to achieve a large depleted active volume. We have characterised monolithic pixel sensors (DMAPS), which were produced modified imaging process implemented TowerJazz 180 nm framework ALICE...
We present a measurement of the pseudorapidity density primary charged particles near mid-rapidity in Au+Au collisions at sqrt(s_NN) = 130 GeV as function number participating nucleons. These results are compared to models an attempt discriminate between competing scenarios particle production heavy ion collisions.
Beam conditions and the potential detector damage resulting from their anomalies have pushed LHC experiments to build own beam monitoring devices. The ATLAS Conditions Monitor (BCM) consists of two stations (forward backward) detectors each with four modules. sensors are required tolerate doses up 500 kGy in excess 1015 charged particles per cm2 over lifetime experiment. Each module includes diamond read out parallel. located symmetrically around interaction point, positioning at z = ±184 cm...
This paper describes the evaporative system used to cool silicon detector structures of inner sub-detectors ATLAS experiment at CERN Large Hadron Collider. The motivation for an system, its design and construction are discussed. In detail particular requirements detector, technical choices qualification manufacture final components addressed. Finally results initial operational tests reported. Although entire described, focuses on on-detector aspects. Details cooling plant will be discussed...
Beam test results of the radiation tolerance study chemical vapour deposition (CVD) diamond against different particle species and energies is presented. We also present beam on independence signal size incident rate in charged detectors based un-irradiated irradiated poly-crystalline CVD over a range fluxes from 2 kHz/cm2 to 10 MHz/cm2. The pulse height sensors was measured with readout electronics peaking time 6 ns. In addition functionality 3D devices demonstrated tests are shown be...
MALTA2 is a depleted monolithic active pixel sensor (DMAPS) designed for tracking at high rates and typically low detection threshold of $\sim150\,\mathrm{e^-}$. A precise knowledge the crucial to understanding charge collection in specifying environment application. simple procedure developed calibrate unit electrons making use dedicated injection circuit an Fe-55 source with dominant deposition $1600\, \mathrm{e^-}$. The voltage determined which corresponds under exposure basis...
The ATLAS collaboration is currently investigating CMOS monolithic pixel sensors for the outermost layer of upgrade its Inner Tracker (ITk). For this application, two large scale prototypes featuring small collection electrode have been produced in a radiation-hard process modification standard 0.18 μm imaging technology: MALTA, with novel asynchronous readout, and TJ MONOPIX, based on well established "column-drain" architecture. MALTA chip first full-scale prototype suitable development...
MALTA is part of the Depleted Monolithic Active Pixel sensors designed in Tower 180nm CMOS imaging technology. A custom telescope with six planes has been developed for test beam campaigns at SPS, CERN, ability to host several devices under test. The system a dedicated readout, online monitoring integrated into DAQ realtime hit map, time distribution and event multiplicity. It hosts fully configurable trigger enabling on coincidence between timing reference from scintillator. excellent...
Two different depleted monolithic CMOS active pixel sensor (DMAPS) prototypes with a fully synchronous column-drain read-out architecture were designed and tested: LF-Monopix TJ-Monopix. These chips are part of R&D effort towards suitable implementation DMAPS for the HL-LHC ATLAS Inner Tracker. was developed using 150nm process on highly resistive substrate (>2 k$Ω\,$cm), while TJ-Monopix fabricated modified 180 nm 1 k$Ω\,$cm epi-layer depletion. The differ in their front-end design,...
This work presents the design and test results of a charged-particle solid-state detector with ultrafast signal response based on polycrystalline chemical-vapor-deposition (pCVD) diamond as active material high-bandwidth RF amplifier. We tested at Indiana University Cyclotron Facility Bloomington, IN, in proton beam kinetic energy ranging from 55 to 200 MeV. The signals showed an average pulsewidth 1.38 ns, which enables single-particle counting instantaneous rates approaching gigahertz...
Depleted monolithic active pixel sensors (DMAPS), which exploit high voltage and/or resistivity add-ons of modern CMOS technologies to achieve substantial depletion in the sensing volume, have proven radiation tolerance towards requirements ATLAS high-luminosity LHC era. DMAPS integrating fast readout architectures are currently being developed as promising candidates for outer layers future Inner Tracker, will be installed during phase II upgrade around year 2025. In this work, two...
In this article, a low-power, radiation-hard front-end circuit for monolithic pixel sensors, designed to meet the requirements of low noise and pixel-to-pixel variability, key features achieve high detection efficiencies, is presented. The sensor small collection electrode capacitance (<5 fF) allows full CMOS in-pixel circuitry. implemented in 180-nm imaging technology from TowerJazz foundry integrated into MALTA2 chip, which part development that targets specifications outer layer ATLAS...