A5039561224- Superconducting Materials and Applications
- Spacecraft and Cryogenic Technologies
- Infection Control and Ventilation
- COVID-19 epidemiological studies
- COVID-19 and healthcare impacts
- Respiratory Support and Mechanisms
- Geothermal Energy Systems and Applications
- Cardiac Arrest and Resuscitation
- COVID-19 and Mental Health
- Gas Dynamics and Kinetic Theory
- Combustion and Detonation Processes
- Graphite, nuclear technology, radiation studies
- Antenna Design and Analysis
- Nuclear reactor physics and engineering
- Climate Change and Health Impacts
- Building Energy and Comfort Optimization
- High-Energy Particle Collisions Research
- Wireless Communication Networks Research
- Planetary Science and Exploration
- Spaceflight effects on biology
- Hydraulic and Pneumatic Systems
- Intensive Care Unit Cognitive Disorders
- Tribology and Lubrication Engineering
- Noise Effects and Management
- Meta-analysis and systematic reviews
European Organization for Nuclear Research
2016-2025
University of Geneva
2025
The COVID-19 pandemic has highlighted the need for a proper risk assessment of respiratory pathogens in indoor settings. This paper documents COVID Airborne Risk Assessment methodology, to assess potential exposure airborne SARS-CoV-2 viruses, with an emphasis on virological and immunological factors quantification risk. model results from multidisciplinary approach linking physical, mechanical biological domains, enabling decision makers or facility managers their setting. was benchmarked...
This study presents an advanced airborne transmission risk assessment model that integrates both short- and long-range routes in the spread of respiratory viruses, building upon CERN Airborne Model for Indoor Risk Assessment (CAiMIRA) aligned with new World Health Organization (WHO) terminology. Thanks to a two-stage exhaled jet approach, accurately simulates short-range exposures, thereby improving infection predictions across diverse indoor settings. Key findings reveal patient wards,...
Indoor aerosol transmission of SARS-CoV-2 has been widely recognised, especially in schools where children remain closed indoor spaces and largely unvaccinated. Measures such as strategic natural ventilation high efficiency particulate air (HEPA) filtration poorly implemented mask mandates are often progressively lifted vaccination rollout is enhanced.We adapted a previously developed model to study the effect interventions (natural ventilation, face masks, HEPA their combinations) on...
Abstract The global crisis triggered by the COVID-19 pandemic has highlighted need for a proper risk assessment of respiratory pathogens in indoor settings. This paper documents COVID Airborne Risk Assessment (CARA) methodology, to assess potential exposure airborne SARS-CoV-2 viruses, with an emphasis on effect certain virological and immunological factors quantification risk. proposed model is result multidisciplinary approach linking physical, mechanical biological domains, benchmarked...
The dimensioning of pressure relief devices (PRD) for helium cryostats requires detailed knowledge the increase during incidents. In case loss insulating vacuum (LIV), this is induced by heat input due to deposition atmospheric air on surface vessel. Instead considering process dynamics, PRD according established standards based constant flux values, yielding potential oversizing. However, depends rate reaching cold surface, thermal capacitance and transfer resistance inside vessel, which...
A bstract Background Indoor aerosol transmission of SARS-CoV-2 has been widely recognized, especially in schools where children remain closed indoor spaces and largely unvaccinated. Measures such as strategic natural ventilation high efficiency particulate air (HEPA) filtration poorly implemented mask mandates are often progressively lifted vaccination rollout is enhanced. Methods We adapted a previously developed model to study the effect interventions (natural ventilation, face masks, HEPA...
The loss of insulating vacuum is often considered as a reasonable foreseeable accident for the dimensioning cryogenic safety relief devices (SRD). test facility PICARD was designed at KIT to investigate such events. In course first experiments, discharge instabilities spring loaded valve (SRV) occurred, so-called chattering and pumping effects. These reduce flow capacity, which leads impermissible over-pressures in system. analysis process dynamics showed indications smaller heat flux than...
CERN has recently designed and constructed a new cryogenic facility for testing large heavy superconducting magnets at liquid helium temperatures. The facility, erected in assembly hall with cranes capable of up to 100 t, provides cooling capacity 1.2 kW 4.5 K equivalent, 15-kW LN <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> warming capabilities three parallel. the required technical infrastructure continuous reliable operation. Test...
The test facility PICARD, which stands for Pressure Increase in Cryostats and Analysis of Relief Devices, has been designed constructed cryogenic safety experiments. With a liquid volume 100 L, nominal design pressure 16 bar(g) the capacity measuring helium mass flow rates through relief devices up to 4 kg/s, allows systematic investigation hazardous incidents cryostats under realistic conditions. In course experiments, insulating vacuum is vented with atmospheric air or gaseous nitrogen at...
The overpressure protection of various types cryogenic vessels is covered by a number International Standards. Helium cryostats, however, include additional components such as superconducting magnets and cavities, electrical heaters control valves with associated piping, which significantly influence the potential risk. At European Committee for Standardization CEN, new working group was hence founded CEN/TC 268/WG6, dealing 'Specific helium technology applications'. Its aim to develop...
A high-quality, low-cost ventilator, dubbed HEV, has been developed by the particle physics community working together with biomedical engineers and physicians around world. The HEV design is suitable for use both in out of hospital intensive care units, provides a variety modes capable supporting spontaneous breathing supplying oxygen-enriched air. An external air supply can be combined unit situations where compressed not readily available. supports remote training post market surveillance...
Abstract The dimensioning of pressure relief devices (PRD) for cryogenic equipment requires knowledge on the heat input at maximum credible incident. In helium cryostats, this situation is typically defined by loss insulating vacuum (LIV), where load induced desublimation and condensation atmospheric air surface. This surface often covered with multi-layer insulation (MLI) in order to reduce thermal radiation standard operation. During vacuum, MLI represents a diffusive barrier reach...