A5105656281- 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
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Crystallization and Solubility Studies
- Computational Physics and Python Applications
- Distributed and Parallel Computing Systems
- Chemical and Physical Properties in Aqueous Solutions
- Radiation Detection and Scintillator Technologies
- Analytical Chemistry and Sensors
- Fluid Dynamics and Mixing
- Particle Accelerators and Free-Electron Lasers
- Chemical Thermodynamics and Molecular Structure
- Electrohydrodynamics and Fluid Dynamics
- Medical Imaging Techniques and Applications
- Thermodynamic properties of mixtures
- Minerals Flotation and Separation Techniques
- Advanced Thermodynamic Systems and Engines
- Gas Dynamics and Kinetic Theory
- Heat Transfer and Boiling Studies
Czech Technical University in Prague
2015-2025
Brandeis University
2023-2024
A. Alikhanyan National Laboratory
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2019-2023
Centre National de la Recherche Scientifique
2023
Institut National de Physique Nucléaire et de Physique des Particules
2023
Université Savoie Mont Blanc
2023
Azerbaijan National Academy of Sciences
2018
European Organization for Nuclear Research
2000-2016
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...
Abstract The response of a polarographic oxygen electrode to step change and an exponential in bulk concentration was studied theoretically experimentally for the case where there is significant liquid film resistance at outer side membrane‐covered electrode. probe has been described by mathematical model which takes into account mass transfer through membrane. It shown that substantial error could be introduced neglecting resistance. A test procedure suggested evaluate significance.
Abstract The response of a polarographic oxygen electrode to step change and an exponential in bulk concentration was studied theoretically experimentally for the case where there is significant liquid film resistance at outerside membrane‐covered electrode. probe has been described considering start‐up period changes (the time that will elapse before new level established and/or volumetric mass transfer coefficient k L regains its steady‐state value after gas supply opened fermentor). A...
We describe a combined ultrasonic instrument for gas flow metering and continuous real-time binary composition measurements. The measurement mixture analysis algorithm employs sound velocity measurements in two directions combination with of the pressure temperature process mixture.
Abstract The silicon tracker of the ATLAS experiment at CERN Large Hadron Collider will operate around –15°C to minimize effects radiation damage. present cooling system is based on a conventional evaporative circuit, removing 60 kW heat dissipated by sensors and their local electronics. compressors in circuit have proved less reliable than originally hoped, be replaced with thermosiphon. working principle thermosiphon uses gravity circulate coolant without any mechanical components...
We investigate and address the performance limitations of ATLAS silicon tracker fluorocarbon evaporative cooling system operation in circuits barrel microstrip (SCT) sub-detector. In these minimum achievable evaporation temperatures with C3F8 were higher than original specification, thought to allow an insufficient safety margin against thermal runaway detector modules subject a radiation dose initially foreseen for 10 years at LHC.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen Probe Dynamics in Flowing FluidsV. Linek, P. Beneš, and V. VacekCite this: Ind. Eng. Chem. Fundamen. 1979, 18, 3, 240–245Publication Date (Print):August 1, 1979Publication History Published online1 May 2002Published inissue 1 August 1979https://pubs.acs.org/doi/10.1021/i160071a008https://doi.org/10.1021/i160071a008research-articleACS PublicationsRequest reuse permissionsArticle Views70Altmetric-Citations15LEARN ABOUT THESE METRICSArticle...
Precision sound velocity measurements can simultaneously determine binary gas composition and flow. We have developed an analyzer with custom electronics, currently in use the ATLAS inner detector, numerous potential applications. The instrument has demonstrated ~0.3% mixture precision for C3F8/C2F6 mixtures < 10-4 resolution N2/C3F8 mixtures. Moderate high flow versions of resolutions +/- 2% F.S. flows up to 250 l.min-1, 1.9% linear velocities 15 ms-1; latter approaching that expected...
We describe a combined ultrasonic instrument for continuous gas flow measurement and simultaneous real-time binary mixture analysis. In the instrument, sound bursts are transmitted in opposite directions, which may be aligned with path or at an angle to it, latter configuration being best adapted high rates. The analysis algorithm exploits phenomenon whereby velocity known temperature pressure is unique function of molar concentration two components. central possible upgrade present ATLAS...
The ATLAS silicon tracker community foresees an upgrade from the present octafluoropropane (C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> F xmlns:xlink="http://www.w3.org/1999/xlink">8</sub> ) evaporative cooling fluid to a composite with probable 10-20% admixture of hexafluoroethane xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> ). Such will allow lower evaporation temperature...
Precision sound velocity measurements can simultaneously determine binary gas composition and flow.We have developed an analyzer with custom microcontroller-based electronics, currently used in the ATLAS Detector Control System, numerous potential applications.Three instruments monitor C 3 F 8 CO 2 coolant leak rates into nitrogen envelopes of silicon microstrip Pixel detectors.Two further will aid operation new thermosiphon recirculator: one these air leaks low pressure condenser while...
The new generation of silicon detectors for particle physics requires very reduced mass and high resistance to radiations with limited access the detector maintenance. Silicon Pixel Detector (SPD) is one 18 ALICE (A Large Io Collider Experiment) experiment at Hadron (LHC) CERN. It constitute two innermost layers Inner Tracking System (ITS) it closest th interaction point.
Abstract This paper deals with a simple model of steady state recrystallization in double crystallizer. Equations describing the particle size distribution are formulated and solved. The relations between resulting working conditions crystallizer discussed.