V. A. Minakov
A5086354083- Laser-Plasma Interactions and Diagnostics
- Particle Accelerators and Free-Electron Lasers
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Material Science and Thermodynamics
- Laser-Matter Interactions and Applications
- Glass properties and applications
- Structural Analysis of Composite Materials
- Ionosphere and magnetosphere dynamics
- Recycling and utilization of industrial and municipal waste in materials production
- Pigment Synthesis and Properties
- Electric Power Systems and Control
- Pulsed Power Technology Applications
- Atomic and Molecular Physics
- Solar and Space Plasma Dynamics
- High-pressure geophysics and materials
- Laser-induced spectroscopy and plasma
- Metallurgical Processes and Thermodynamics
- Particle Detector Development and Performance
- Industrial Engineering and Technologies
- Particle physics theoretical and experimental studies
- Engineering Technology and Methodologies
- Mining and Gasification Technologies
- Plasma and Flow Control in Aerodynamics
- Innovations in Concrete and Construction Materials
Budker Institute of Nuclear Physics
2014-2024
Novosibirsk State University
2014-2024
Institute of Applied Physics
2023
Siberian Branch of the Russian Academy of Sciences
2014-2021
Campbell Collaboration
2020
Google (United States)
2019
Iscte – Instituto Universitário de Lisboa
2017
European Organization for Nuclear Research
2016
Institute of Glass
1970-1986
Petersburg Nuclear Physics Institute
1981-1982
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.
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...
We report a recently discovered counterintuitive effect where breaking of Langmuir wave in plasma wakefield accelerator leads to an increase the accelerating field rather than dissipation. The relies on ability transversely waves draw energy from nearby regions due inflow electrons oscillating collectively and outflow moving individually.
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...
The dependence of wakefield amplitude and phase on beam plasma parameters is studied in the parameter area interest for self-modulating proton beam-driven acceleration. shown to be extremely sensitive small variations density, while sensitivity other reasonably low. study large clarifies effects that limit achievable accelerating field different parts space: nonlinear elongation period, insufficient charge drive beam, emittance-driven divergence, motion ions.
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 Seeded self-modulation in a plasma can transform long proton beam into train of micro-bunches that excite strong wakefield over distances, but this needs the to have certain density profile with short-scale ramp up. For parameters AWAKE experiment at CERN we numerically study which profiles are optimal if is seeded by short electron bunch. With profiles, it possible ‘freeze’ approximately half wavebreaking level. High-energy bunches (160 MeV) less efficient seeds than low-energy...
We discovered a novel effect that can cause witness emittance growth in plasma wakefield accelerators. The appears linear or moderately nonlinear waves. experiences time-varying focusing force and loses quality during the time required for drive beam to reach transverse equilibrium with wave. higher charge, lower rate because of additional by its own wakefield. However, head always degrades, boundary between degraded intact parts gradually propagates backward along bunch.
Ion motion in plasma wakefield accelerators can cause temporal increase of the longitudinal electric field shortly before wave breaks. The is caused by re-distribution energy transverse direction and may be important for correct interpretation experimental results acceleration high-quality beams.
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...
The idle time of shunting locomotives in standby mode is up to 50% the working shift time. When locomotive idling cold season, it necessary maintain diesel engine «hot» state, i.e. idling, at different positions driver’s controller. article presents research effect on wear limiting parts engine, namely, cylinder bushings locomotive. method calculating amount depending operating each position controller given. presented mathematical model developed using machine learning models, standard...