Alexey Arefiev
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View article: Generation of ultrahigh field by micro-bubble implosion
Generation of ultrahigh field by micro-bubble implosion Open
Breaking the 100-MeV barrier for proton acceleration will help elucidate fundamental physics and advance practical applications from inertial confinement fusion to tumour therapy. Herein we propose a novel concept of bubble implosions. A b…
View article: Plasma gradient effect on direct laser acceleration
Plasma gradient effect on direct laser acceleration Open
The transfer of a high-intensity laser pulse energy to a high-energy electron beam via the direct laser acceleration mechanism is shown to be significantly enhanced through control of the plasma density gradient. Experiments performed usin…
View article: Enhanced energy gain through higher-order resonances during direct laser acceleration with superluminal phase velocity
Enhanced energy gain through higher-order resonances during direct laser acceleration with superluminal phase velocity Open
Ultra-high intensity laser–plasma interactions can produce ultra-relativistic electrons via direct laser acceleration, assisted by quasi-static plasma magnetic and electric fields. These fields transversely confine electron motion and indu…
View article: High-resolution direct phase control in the spectral domain in ultrashort pulse lasers for pulse-shaping applications
High-resolution direct phase control in the spectral domain in ultrashort pulse lasers for pulse-shaping applications Open
Ultrafast laser systems, those with a pulse duration on the order of picoseconds or less, have enabled advancements in a wide variety of fields. Of particular interest to this work, these laser systems are the key component to many High En…
View article: Trends in relativistic laser–matter interaction: the promises of structured light
Trends in relativistic laser–matter interaction: the promises of structured light Open
Time and space envelope, frequency and wavelength distributions, polarization, and phase are quantities that define the properties of laser light. Controlling them opens up strategies for manipulating the properties of atoms in various med…
View article: Commissioning of the 1 PW experimental area at ELI-NP using a short focal parabolic mirror for proton acceleration
Commissioning of the 1 PW experimental area at ELI-NP using a short focal parabolic mirror for proton acceleration Open
High-power laser systems have opened new frontiers in scientific research and have revolutionized various scientific fields, offering unprecedented capabilities for understanding fundamental physics and allowing unique applications. This p…
View article: Collimated γ-ray emission enabled by efficient direct laser acceleration
Collimated γ-ray emission enabled by efficient direct laser acceleration Open
We investigate the mechanisms responsible for single-lobed versus double-lobed angular distributions of emitted γ -rays in laser-irradiated plasmas, focusing on how direct laser acceleration (DLA) shapes the emission profile. Using test-pa…
View article: Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser–matter interaction
Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser–matter interaction Open
With the advent of high repetition rate laser facilities, novel diagnostic tools compatible with these advanced specifications are required. This paper presents the design of an active gamma-ray spectrometer intended for these high repetit…
View article: Generation of 10 kT axial magnetic fields using multiple conventional laser beams: A sensitivity study for kJ PW-class laser facilities
Generation of 10 kT axial magnetic fields using multiple conventional laser beams: A sensitivity study for kJ PW-class laser facilities Open
Strong multi-kilotesla magnetic fields have various applications in high-energy density science and laboratory astrophysics, but they are not readily available. In our previous work [Y. Shi et al., Phys. Rev. Lett. 130, 155101 (2023)], we …
View article: Efficient backward x-ray emission in a finite-length plasma irradiated by a laser pulse of picosecond duration
Efficient backward x-ray emission in a finite-length plasma irradiated by a laser pulse of picosecond duration Open
Motivated by experiments employing picosecond-long, kilojoule laser pulses, we examined x-ray emission in a finite-length underdense plasma irradiated by such a pulse using two-dimensional particle-in-cell simulations. We found that, in ad…
View article: High-resolution direct phase control in the spectral domain in ultrashort pulse lasers for pulse-shaping applications
High-resolution direct phase control in the spectral domain in ultrashort pulse lasers for pulse-shaping applications Open
Ultrafast laser systems, those with a pulse duration on the order of picoseconds or less, have enabled advancements in a wide variety of fields. Of particular interest to this work, these laser systems are the key component to many High En…
View article: Quasi-monoenergetic ion acceleration and neutron generation from laser-driven transverse collisionless shocks
Quasi-monoenergetic ion acceleration and neutron generation from laser-driven transverse collisionless shocks Open
Experiments using the OMEGA EP laser system were performed to study collisionless shock acceleration of ions driven by the interaction of a relativistically intense laser pulse with underdense plasma. The energy spectrum of accelerated ion…
View article: Collimated $γ$-ray emission enabled by efficient direct laser acceleration
Collimated $γ$-ray emission enabled by efficient direct laser acceleration Open
We investigate the mechanisms responsible for single-lobed versus double-lobed angular distributions of emitted $γ$-rays in laser-irradiated plasmas, focusing on how direct laser acceleration (DLA) shapes the emission profile. Using test-p…
View article: A deep learning approach to fast analysis of collective Thomson scattering spectra
A deep learning approach to fast analysis of collective Thomson scattering spectra Open
Fast analysis of collective Thomson scattering ion acoustic wave features using a deep convolutional neural network model is presented. The network was trained from spectra to predict the plasma parameters, including ion velocities, popula…
View article: Efficient backward x-ray emission in a finite-length plasma irradiated by a laser pulse of ps duration
Efficient backward x-ray emission in a finite-length plasma irradiated by a laser pulse of ps duration Open
Motivated by experiments employing ps-long, kilojoule laser pulses, we examined x-ray emission in a finite-length underdense plasma irradiated by such a pulse using two dimensional particle-in-cell simulations. We found that, in addition t…
View article: The influence of laser focusing conditions on the direct laser acceleration of electrons
The influence of laser focusing conditions on the direct laser acceleration of electrons Open
Direct laser acceleration of electrons during a high-energy, picosecond laser interaction with an underdense plasma has been demonstrated to be substantially enhanced by controlling the laser focusing geometry. Experiments using the OMEGA …
View article: Direct Laser Acceleration in Underdense Plasmas with Multi-PW Lasers: A Path to High-Charge, GeV-Class Electron Bunches
Direct Laser Acceleration in Underdense Plasmas with Multi-PW Lasers: A Path to High-Charge, GeV-Class Electron Bunches Open
The direct laser acceleration (DLA) of electrons in underdense plasmas can provide hundreds of nC of electrons accelerated to near-GeV energies using currently available lasers. Here we demonstrate the key role of electron transverse displ…
View article: Space-Time Structured Plasma Waves
Space-Time Structured Plasma Waves Open
Electrostatic waves play a critical role in nearly every branch of plasma physics from fusion to advanced accelerators, to astro, solar, and ionospheric physics. The properties of planar electrostatic waves are fully determined by the plas…
View article: Electron energy gain due to a laser frequency modulation experienced by electron during betatron motion
Electron energy gain due to a laser frequency modulation experienced by electron during betatron motion Open
Direct laser acceleration of electrons is an important energy deposition mechanism for laser-irradiated plasmas that is particularly effective at relativistic laser intensities in the presence of quasi-static laser-driven plasma electric a…
View article: Undepleted direct laser acceleration
Undepleted direct laser acceleration Open
Intense lasers enable generating high-energy particle beams in university-scale laboratories. With the direct laser acceleration (DLA) method, the leading part of the laser pulse ionizes the target material and forms a positively charged i…
View article: Generation of 10 kT Axial Magnetic Fields Using Multiple Conventional Laser Beams: A Sensitivity Study for kJ PW-Class Laser Facilities
Generation of 10 kT Axial Magnetic Fields Using Multiple Conventional Laser Beams: A Sensitivity Study for kJ PW-Class Laser Facilities Open
Strong multi-kilotesla magnetic fields have various applications in high-energy density science and laboratory astrophysics, but they are not readily available. In our previous work [Y. Shi et al., Phys. Rev. Lett. 130, 155101 (2023)], we …
View article: Electron energy gain due to a laser frequency modulation experienced by electron during betatron motion
Electron energy gain due to a laser frequency modulation experienced by electron during betatron motion Open
Direct laser acceleration of electrons is an important energy deposition mechanism for laser-irradiated plasmas that is particularly effective at relativistic laser intensities in the presence of quasi-static laser-driven plasma electric a…
View article: Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser-matter interaction
Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser-matter interaction Open
With the advent of high repetition rate laser facilities, novel diagnostic tools compatible with these advanced specifications are required. This paper presents the design of an active gamma-ray spectrometer intended for these high repetit…
View article: Intense laser interaction with micro-bars
Intense laser interaction with micro-bars Open
Intense laser fields interact very differently with micrometric rough surfaces than with flat objects. The interaction features high laser energy absorption and increased emission of MeV electrons, ions, and of hard x-rays. In this work, w…
View article: High field suppression of bremsstrahlung emission in high-intensity laser–plasma interactions
High field suppression of bremsstrahlung emission in high-intensity laser–plasma interactions Open
The interaction of high-intensity lasers with plasma is predicted to produce extreme quasi-static magnetic fields with magnitudes approaching Megatesla levels. In relativistically transparent plasmas, these fields can enhance direct laser …
View article: Space-time structured plasma waves
Space-time structured plasma waves Open
Electrostatic waves play a critical role in nearly every branch of plasma physics from fusion to advanced accelerators, to astro, solar, and ionospheric physics. The properties of planar electrostatic waves are fully determined by the plas…
View article: Positron generation and acceleration in a self-organized photon collider enabled by an ultra-intense laser pulse
Positron generation and acceleration in a self-organized photon collider enabled by an ultra-intense laser pulse Open
We discovered a simple regime where a near-critical plasma irradiated by a laser of experimentally available intensity can self-organize to produce positrons and accelerate them to ultra-relativistic energies. The laser pulse piles up elec…
View article: Effects of a strong applied magnetic field on relativistic laser-plasma interactions
Effects of a strong applied magnetic field on relativistic laser-plasma interactions Open
This project investigated the role played by strong external magnetic fields in laser-matter interactions at relativistic intensities and their impact of resulting high-energy density phenomena. The regimes that can benefit from currently …