П. В. Туев
A5053661798- Laser-Plasma Interactions and Diagnostics
- Particle Accelerators and Free-Electron Lasers
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- High-pressure geophysics and materials
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Particle Detector Development and Performance
- High-Velocity Impact and Material Behavior
- Plasma Diagnostics and Applications
- Particle physics theoretical and experimental studies
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Laser Material Processing Techniques
- Particle Dynamics in Fluid Flows
- Plasma and Flow Control in Aerodynamics
- Orbital Angular Momentum in Optics
- Electromagnetic Compatibility and Measurements
- Gamma-ray bursts and supernovae
- Laser Design and Applications
- Quantum and Classical Electrodynamics
- Pulsed Power Technology Applications
- Precipitation Measurement and Analysis
- Radiation Therapy and Dosimetry
Siberian Branch of the Russian Academy of Sciences
2017-2024
Novosibirsk State University
2017-2024
Budker Institute of Nuclear Physics
2017-2024
European Organization for Nuclear Research
2023
Campbell Collaboration
2020-2022
Google (United States)
2019
Karlsruhe Institute of Technology
2016
Ludwig-Maximilians-Universität München
2016
Daresbury Laboratory
2016
École Polytechnique Fédérale de Lausanne
2016
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 show in experiments that a long, underdense, relativistic proton bunch propagating plasma undergoes the oblique instability, which we observe as filamentation. determine threshold value for ratio between transverse size and skin depth instability to occur. At threshold, outcome of experiment alternates filamentation self-modulation (evidenced by longitudinal modulation into microbunches). Time-resolved images density distribution reveal grows an observable level late along bunch,...
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...
Abstract A new regime of proton-driven plasma wakefield acceleration is discovered, in which the nonlinearity increases phase velocity excited wave compared to that protons. If beam charge much larger than minimally necessary excite a nonlinear wave, there sufficient freedom choosing longitudinal density profile make speed close light. This allows electrons or positrons be accelerated about 200 GeV with 400 proton driver.
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.
Self-modulation is a beam–plasma instability that useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing ratio between initial transverse size of bunch and depth, occurs later along bunch, or not at all, over fixed length because amplitude decreases. show cases for which self-modulation does develop, we introduce simple model discussing conditions it would occur after any length. Changing...
By combining the linear theory and numerical simulations, we study response of a radially bounded axisymmetric plasma to relativistic charged particle beams in wide range densities. We present analytical expressions for magnetic field generated dense plasma, demonstrate vanishing wakefield potential beyond trajectory outermost electron, follow change as density decreases. At high densities, wavefronts electron radial electric are distorted due beam charge current neutralization, while...
If a laser- or particle beam-driven plasma wakefield accelerator operates in the linear moderately nonlinear regime, injecting an externally produced bunch (witness) to be accelerated may encounter alignment problem. Witness tolerances can relaxed by using damper, additional same injector and propagating at submillimeter distance ahead of witness. misaligned, damper perturbs such way that witness shifts on-axis with no quality loss.
If a laser- or particle beam-driven plasma wakefield accelerator operates in the linear moderately nonlinear regime, injecting an externally produced bunch (witness) to be accelerated may encounter alignment problem. Witness tolerances can relaxed by using damper, additional same injector and propagating at submillimeter distance ahead of witness. misaligned, damper perturbs such way that witness shifts on-axis with no quality loss.
Plasma wakefield dynamics over timescales up to 800 ps, approximately 100 plasma periods, are studied experimentally at the Advanced Wakefield Experiment (AWAKE). The development of longitudinal amplitude driven by a self-modulated proton bunch is measured using external injection witness electrons that sample fields. In simulation, resonant excitation causes electron trajectory crossing, resulting in potential outside boundary as transversely ejected. Trends consistent with presence this...
We present numerical simulations and experimental results of the self-modulation a long proton bunch in plasma with linear density gradients along beam path. Simulation agree reported [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)]: negative gradients, charge modulated is lower than positive gradients. In addition, modulation frequency varies gradient. show that dephasing wakefields respect to relativistic protons main cause for loss charge. The...
The channeling of laser pulses in waveguides filled with a rare plasma is one promising techniques wakefield acceleration. A solid-state capillary can precisely guide tightly focused pulses. Regardless the material capillary, its walls behave like under influence high-intensity pulse. Therefore, waveguide modes capillaries have universal structure, which depends only on shape cross-section. Due to large ratio radius wavelength, circular differ from classical TE and TM modes. attenuation...
In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from Super Proton Synchrotron (SPS) 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. Agreement achieved for populations between $10^{11}$ and $3 \times 10^{11}$ particles, various plasma density gradients ($-20 \div 20\%$) two densities ($2\times 10^{14} \text{cm}^{-3}$...
A precise characterization of the incoming proton bunch parameters is required to accurately simulate self-modulation process in Advanced Wakefield Experiment (AWAKE). This paper presents an analysis bunches used later stages AWAKE Run 1 data-taking period. The transverse structure observed at multiple positions along beamline using scintillating or optical transition radiation screens. a model that describes dimensions and divergence are fitted represent data Bayesian inference. tested on...