A. Utrobicic
A5107883552- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Plasma Diagnostics and Applications
- Atomic and Subatomic Physics Research
- Photocathodes and Microchannel Plates
- Nuclear reactor physics and engineering
- Air Quality Monitoring and Forecasting
- Radiation Effects in Electronics
- Nuclear Physics and Applications
- Nanowire Synthesis and Applications
- advanced mathematical theories
- Magnetic Field Sensors Techniques
- Pulsars and Gravitational Waves Research
- Superconducting Materials and Applications
- Sensor Technology and Measurement Systems
- Muon and positron interactions and applications
- Cosmology and Gravitation Theories
- Gas Sensing Nanomaterials and Sensors
- Dark Matter and Cosmic Phenomena
- Semiconductor materials and interfaces
- Neutrino Physics Research
Rudjer Boskovic Institute
2023-2024
European Organization for Nuclear Research
2020-2023
European Spallation Source
2023
A. Alikhanyan National Laboratory
2017-2020
University of Zagreb
2015-2020
Abstract PICOSEC Micromegas (MM) is a precise timing gaseous detector based on Cherenkov radiator coupled with semi-transparent photocathode and an MM amplifying structure. The concept was successfully demonstrated through single-channel prototype, achieving sub-25 ps time resolution Minimum Ionizing Particles (MIPs). A series of studies followed, aimed at developing robust, large-area, scalable detectors high resolution, complemented by specialized fast-response readout electronics. This...
We report on the measurement of freeze-out radii for pairs identical-charge pions measured in Pb-Pb collisions at sNN=2.76 TeV as a function collision centrality and average transverse momentum pair kT. Three-dimensional sizes system (femtoscopic radii), well direction-averaged one-dimensional are extracted. The decrease with kT, following power-law behavior. This is qualitatively consistent expectations from collectively expanding system, produced hydrodynamic calculations. also scale...
Abstract The PICOSEC Micromegas (MM) detector is a precise timing gaseous consisting of Cherenkov radiator combined with photocathode and MM amplifying structure. A 100-channel prototype 10 × cm 2 active area equipped Cesium Iodide (CsI) demonstrated time resolution below σ = 18 ps. objective this work to improve the robustness aspects, i.e. integration resistive carbon-based photocathodes, while maintaining good resolution. prototypes have been tested in laboratory conditions successfully...
Abstract The PICOSEC Micromegas (MM) detector is a precise timing gaseous based on MM operating in two-stage amplification mode and Cherenkov radiator. Prototypes equipped with cesium iodide (CsI) photocathodes have shown promising time resolutions as 24 picoseconds (ps) for Minimum Ionizing Particles. However, due to the high hygroscopicity susceptibility ion bombardment of CsI photocathodes, alternative photocathode materials are needed improve robustness MM. Diamond-like Carbon (DLC) film...
Integrating the ATLAS/BNL VMM3a ASIC (Application Specific Integrated Circuit) into RD51/SRS (Scalable Readout System) provides a self-triggered continuous readout system for various gaseous detectors. Since allows flexible parameters, such as switching polarity, adjusting electronics gain or different peaking times, settings can be adjusted wide range of The particles to recorded with MHz interaction rate in energy, space, and time. will introduced beginning, short examples given...
The VMM3a is an Application Specific Integrated Circuit (ASIC), specifically developed for the readout of gaseous detectors. Originally within ATLAS New Small Wheel (NSW) upgrade, it has been successfully integrated into Scalable Readout System (SRS) RD51 collaboration. This allows, to use also in small laboratory set-ups and mid-scale experiments, which make Micro-Pattern Gaseous Detectors (MPGDs). As part integration SRS, data transfer scheme was optimised reach a high rate-capability...
We report on the formation of Ge/Si quantum dots with core/shell structure that are arranged in a three-dimensional body centered tetragonal dot lattice an amorphous alumina matrix. The material is prepared by magnetron sputtering deposition Al2O3/Ge/Si multilayer. inversion Ge and Si sequence results thin Si/Ge layers instead dots. Both materials show atomically sharp interface between parts layers. They have internal can be crystallized annealing treatment. light absorption properties...
Abstract The PICOSEC Micromegas precise timing detector is based on a Cherenkov radiator coupled to photocathode operating in semi-transparent mode and amplification structure. first proof of concept single-channel prototype was able achieve time resolution below 25 ps. One the crucial aspects development gaseous detectors applicable high-energy physics experiments modular design that enables large area coverage. 19-channel multi-pad with an active approximately 10 cm 2 suffered from...
The integration of the VMM3a Application-Specific Integrated Circuit (ASIC) into RD51's Scalable Readout System (SRS) provides a versatile tool for readout Micro-Pattern Gaseous Detectors (MPGDs). With its self-triggered high-rate readout, analogue part that allows to get information on deposited energy in detector, and so-called neighbouring-logic recover charge distribution, this new system has features particular interest digital X-ray imaging. In present article, we want emphasise...
The PICOSEC Micromegas detector is a precise timing gaseous based on Cherenkov radiator coupled to semi-transparent photocathode and amplifying structure. First single-pad prototypes demonstrated time resolution below σ= 25 ps, however, make the concept appropriate physics applications, several developments are required. objective of this work was achieve an equivalent for 10 × cm2 area detector. prototype designed, produced tested in laboratory successfully operated with 80 GeV/c muon beam....
The implementation of the VMM3a Application-Specific Integrated Circuit (ASIC) into Scalable Readout System (SRS) has opened a new domain for measurements with Micro-Pattern Gaseous Detectors (MPGDs). In presented studies we demonstrate capabilities this system, specifically time-resolution in nanosecond regime combination continuous multichannel readout and 10-bit ADC. We can now resolve interaction argon fluorescence X-ray photons created gaseous detector utilise these interactions to...
We describe the development of a position-sensitive Gas Electron Multiplier detector prototype, providing for each ionizing event three coordinates: cartesian X and Y, U at 45°. Simultaneous recording projections permits ambiguity-free reconstruction multiple tracks, aims operation in very high intensity radiation fields.
Abstract To enhance the performance of micro-patterned gaseous detectors (MPGDs) to meet challenging requirements future high energy physics (HEP) experiments, two-dimensional (2D) materials are attractive candidates address back flow positive ions, which affects detector by distorting electric field lines. In this context, graphene is promising work as selective filter for ion suppression, being transparent electrons while at same time blocking ions. Also, membranes can physically separate...
This paper presents design guidelines and experimental verification of a single-channel PICOSEC Micromegas (MM) detector with an improved time resolution. The encompasses the board, vessel, auxiliary mechanical parts, electrical connectivity for high voltage (HV) signals, focusing on improving stability, reducing noise, ensuring signal integrity to optimize timing performance. A notable feature is simple fast reassembly procedure, facilitating quick replacement internal components that...