A5061378636- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Fuel Cells and Related Materials
- Advanced X-ray Imaging Techniques
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Magnetic confinement fusion research
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Electromagnetic Launch and Propulsion Technology
- Ionosphere and magnetosphere dynamics
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Laser-Matter Interactions and Applications
- Nuclear and radioactivity studies
- Atomic and Molecular Physics
- Nuclear Materials and Properties
- Graphite, nuclear technology, radiation studies
- Electrostatic Discharge in Electronics
- Hybrid Renewable Energy Systems
- Nuclear Engineering Thermal-Hydraulics
European Organization for Nuclear Research
2007-2024
Fraunhofer Institute for Chemical Technology
2023
Google (United States)
2019
We give direct experimental evidence for the observation of full transverse self-modulation a long, relativistic proton bunch propagating through dense plasma. The exits plasma with periodic density modulation resulting from radial wakefield effects. show that is seeded by ionization front created using an intense laser pulse copropagating bunch. extends over length following seed point. By varying one order magnitude, we frequency scales expected dependence on density, i.e., it equal to...
The seeded self-modulation of a relativistic, charged particle bunch in plasma is shown to grow both along the and plasma, resulting transverse wakefield amplitudes that far exceed initial seed values.
Abstract Relativistic electron-positron plasmas are ubiquitous in extreme astrophysical environments such as black-hole and neutron-star magnetospheres, where accretion-powered jets pulsar winds expected to be enriched with pairs. Their role the dynamics of is many cases believed fundamental, but their behavior differs significantly from typical electron-ion due matter-antimatter symmetry charged components. So far, our experimental inability produce large yields positrons quasi-neutral...
AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here ready for systematic study of seeded self-modulation 400\,GeV proton bunch in 10\,m-long rubidium with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. short laser pulse used ionization vapor propagates all way along column, suggesting full vapor. occurs bunch, at time and follows affects bunch.
A loss-of-coolant accident (LOCA) is one of the most severe accidents for a nuclear power plant. To demonstrate inherent safety characteristics incorporated into small high-temperature gas-cooled reactor (HTGR) designs, LOCA simulation tests have been conducted at Arbeitsgemein-schaft Versuchsreaktor (AVR), German pebble-bed The AVR only plant ever to intentionally subjected conditions without emergency cooling.The planning and licensing activities including pretest predictions performed...
AWAKE, the Advanced Proton-Driven Plasma Wakefield Acceleration Experiment, is a proof-of-principle R&D experiment at CERN using 400 GeV/c proton beam from SPS (longitudinal size sigma_z = 12 cm) which will be sent into 10 m long plasma section with nominal density of approx. 7x10^14 atoms/cm3 (plasma wavelength lambda_p 1.2mm). In this paper we show that by measuring time integrated transverse profile bunch two locations downstream AWAKE plasma, information about occurrence self-modulation...
In this article, we briefly summarize the experiments performed during first Run of Advanced Wakefield Experiment, AWAKE, at CERN (European Organization for Nuclear Research). The final goal AWAKE 1 (2013 - 2018) was to demonstrate that \unit[10-20]{MeV} electrons can be accelerated GeV-energies in a plasma wakefield driven by highly-relativistic self-modulated proton bunch. We describe experiment, outline measurement concept and present results. Last, our plans future.
The goal of the first phase AWAKE \cite{AWAKE1,AWAKE2} experiment at CERN is to measure self-modulation \cite{SMI} $\sigma_z = 12\,\rm{cm}$ long SPS proton bunch into microbunches after traversing $10\,\rm{m}$ plasma with a density $n_{pe}=7\times10^{14}\,\rm{electrons/cm}^3$. two screen measurement setup \cite{Turner2016} beam diagnostic that can indirectly prove successful development by imaging protons got defocused transverse wakefields passing through plasma, locations downstream end...
Collision rate monitors are essential in bringing particle beams into collision and optimizing the performances of a collider. In case LHC relative luminosity will be monitored by measuring flux small angle neutral particles produced collisions. Due to very different levels at four interaction regions (IR) two types have been developed. At high IR (ATLAS CMS) fast ionization chambers installed while other (ALICE LHC-b) solid state polycrystalline Cadmium Telluride (CdTe) detectors used. The...
The beam dump facility (BDF) is a project for new at CERN dedicated to high intensity and fixed target experiments. Currently in its design phase, the first aim of search light dark matter hidden sector models with Search Hidden Particles (SHiP) experiment. At core sits dense target/dump, whose function absorb safely $400\text{ }\text{ }\mathrm{GeV}/\mathrm{c}$ Super Proton Synchrotron (SPS) maximize production charm beauty mesons. An average power 300 kW will be deposited on target, which...
The negative effects of airborne contaminants on polymer electrolyte membrane fuel cell (PEMFC) have already been shown in several publications. [1] Among these contaminants, ammonia (NH 3 ) with its multistep reversible and irreversible is particularly significant. Recent studies air quality urban areas revealed a notable increase levels within span two years. [2] This rapid can be attributed to the growing prevalence EURO-6 diesel vehicles equipped selective catalytic reduction (SCR) cats,...
Relativistic electron-positron plasmas are ubiquitous in extreme astrophysical environments such as black holes and neutron star magnetospheres, where accretion-powered jets pulsar winds expected to be enriched with pair plasmas. Their behaviour is quite different from typical electron-ion due the matter-antimatter symmetry of charged components their role dynamics compact objects believed fundamental. So far, our experimental inability produce large yields positrons quasi-neutral beams has...
Fuel cell technology has gained considerable attention as an alternative power source for mobility applications. systems are already integrated in ground applications like trucks, cars, and busses. One reason is, that they have the potential to provide environmentally friendly supply solution compared traditional combustion engines. Moreover, fuel drive trains offer several benefits, such improved energy efficiency, noise reduction no local emissions even zero CO 2 emission if fueled with...
Air pollution is still a bitter truth in many locations the world. In highly populated regions like metropolitan areas as well agricultural there are various airborne contaminants which can be harmful to organisms. Also fuel cells, especially PEMFC sensitive contaminants. most mobile and stationary PEM cell systems, ambient air used oxidant gas at cathode of cell. It cost weight saving because no need install additional tank for pure oxygen refill it, but performance suffer beyond gain from...
Polymer electrolyte membrane water electrolyzers (PEMEL) have been identified as a key component in decarbonized large-scale energy system, they can produce high-purity hydrogen from renewable electricity sources for the chemical industry or storage. However, long-term durability and performance of PEM remain major challenge, with degradation being critical factor that limits their lifespan efficiency. Recent studies focused on developing accelerated stress test (AST) protocols to better...