A5068219166- Laser-Plasma Interactions and Diagnostics
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- Laser-Matter Interactions and Applications
- Muon and positron interactions and applications
- Plasma Diagnostics and Applications
- Superconducting Materials and Applications
- Laser Design and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Laser-induced spectroscopy and plasma
- Tribology and Lubrication Engineering
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- bioluminescence and chemiluminescence research
- Spacecraft Dynamics and Control
- Space Satellite Systems and Control
- Adhesion, Friction, and Surface Interactions
- Plasma and Flow Control in Aerodynamics
- Advanced Optical Sensing Technologies
European Organization for Nuclear Research
2017-2024
Max Planck Institute for Physics
2016-2023
Campbell Collaboration
2020-2022
Technical University of Munich
2019
Max Planck Society
2015-2019
Google (United States)
2019
Jet Propulsion Laboratory
1965
California Institute of Technology
1964
High energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. In order to increase or reduce size accelerator, new acceleration schemes need be developed. Plasma wakefield acceleration, which electrons plasma are excited, leading strong electric fields, is one such promising novel technique. Pioneering experiments shown an intense laser pulse electron bunch traversing plasma, drives fields 10s...
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment CERN the world׳s first experiment. AWAKE will be installed in former CNGS facility uses 400 GeV/c beam bunches from SPS. experiments focus on self-modulation instability of long (rms ~12 cm) bunch plasma. These are planned for end 2016. Later, 2017/2018, low energy (~15 MeV)...
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.
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.
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. The use high energy protons drive wakefields in plasma has been demonstrated during Run 1 AWAKE programme at CERN. Protons 400 GeV drove that accelerated electrons 2 under 10 m plasma. collaboration now embarking on with main aims demonstrate stable accelerating gradients 0.5–1 GV/m, preserve emittance electron bunches and develop sources scalable 100s metres beyond. By end 2, scheme should...
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton can be seeded by wakefields driven preceding electron bunch. timing reproducibility and control are at level small fraction modulation period. With this seeding method, we independently amplitude seed with charge growth rate Seeding leads larger than instability case.
We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of long proton bunch in plasma. show experimentally that, with sufficient amplitude [$\ensuremath{\ge}(4.1\ifmmode\pm\else\textpm\fi{}0.4)\text{ }\text{ }\mathrm{MV}/\mathrm{m}$], phase modulation along is reproducible from event event, 3%--7% (of $2\ensuremath{\pi}$) rms variations all bunch. The not lower amplitudes. observe transition between these two regimes. Phase...
A muon collider would enable the big jump ahead in energy reach that is needed for a fruitful exploration of fundamental interactions. The challenges producing collisions at high luminosity and 10 TeV centre mass are being investigated by recently-formed International Muon Collider Collaboration. This Review summarises status recent advances on colliders design, physics detector studies. aim to provide global perspective field outline directions future work.
The AWAKE experiment requires an automated online rubidium (Rb) plasma density and gradient diagnostic for densities between 1 10⋅1014 cm−3. A linear along the source at percent level may be useful to improve electron acceleration process. Because of full laser ionization Rb vapor Rb+ within a radius mm, equals density. We measure both ends source, with high precision using, white light interferometry. At either end, broadband passes remotely controlled Mach–Zehnder interferometer built out...
This document is comprised of a collection updated preliminary parameters for the key parts muon collider. The follow on from October 2023 Tentative Parameters Report. Particular attention has been given to regions facility that are believed hold greater technical uncertainty in their design and have strong impact cost power consumption facility. data collected collaborative spreadsheet transferred overleaf.
The AWAKE Collaboration has been formed in order to demonstrate proton-driven plasma wakefield acceleration for the first time. This technique could lead future colliders of high energy but a much reduced length when compared proposed linear accelerators. CERN SPS proton beam CNGS facility will be injected into 10 m cell where long bunches modulated significantly shorter micro-bunches. These micro-bunches then initiate strong with peak fields above 1 GV/m that harnessed accelerate bunch...
We study experimentally the longitudinal and transverse wakefields driven by a highly relativistic proton bunch during self-modulation in plasma. show that wakefields' growth amplitude increase with increasing seed as well charge using maximum radius of distribution measured on screen downstream from externally injecting electrons measuring their final energy. Measurements agree trends predicted theory numerical simulations validate our understanding development self-modulation. Experiments...
Abstract In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from Super Proton Synchrotron at CERN. The angular distribution protons deflected due to SSM is quantitative measure process, which agrees with simulations by two-dimensional (axisymmetric) particle-in-cell code LCODE about 5%. agreement achieved in population scans two selected plasma densities and scan longitudinal density gradient. reached only case wide enough simulation box (several...
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.
We study experimentally the effect of linear plasma density gradients on self-modulation a 400\,GeV proton bunch. Results show that positive/negative gradient in/decreases number micro-bunches and relative charge per micro-bunch observed after 10\,m plasma. The measured modulation frequency also in/decreases. With largest positive we observe two frequencies in power spectrum. are consistent with changes wakefields' phase velocity due to adding slow during growth predicted by theory.
Abstract We describe a method to overcome the triggering jitter of streak camera obtain less noisy images self-modulated proton bunch over long time scales (~ 400 ps ns) with resolution 1 ps) short scale (73 ps). also determine that this method, using reference laser pulse variable delay, leads determination delay between ionizing and an error 0.6 (rms).
We study the propagation of 0.05-1 TW power, ultrafast laser pulses in a 10 meter long rubidium vapor cell. The central wavelength is resonant with $D_2$ line and peak intensity $10^{12}-10^{14} ~W/cm^2$ range, enough to create plasma channel single electron ionization. observe absorption pulse for low energy, regime transverse confinement beam by strong nonlinearity higher energies broadening output when saturated due full medium compare experimental observations transmitted energy fluence...
Creating extended, highly homogeneous plasma columns like that required by wakefield accelerators can be a challenge. We study the propagation of ultra-short, terawatt power ionizing laser pulses in 10-meter-long rubidium vapor and they create. perform experiments numerical simulations for with 780 nm central wavelength, which is resonant D2 transition from ground state atoms, as well 810 some distance resonances. measure transmitted energy transverse width pulse use schlieren imaging to...