A5058905996- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Cold Atom Physics and Bose-Einstein Condensates
- Laser-Matter Interactions and Applications
- Quantum, superfluid, helium dynamics
- Strong Light-Matter Interactions
- Ion-surface interactions and analysis
- Environmental Toxicology and Ecotoxicology
- Optical Coherence Tomography Applications
- Marine Biology and Environmental Chemistry
- Magnetic confinement fusion research
- Quantum optics and atomic interactions
- Advanced Measurement and Metrology Techniques
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Dust and Plasma Wave Phenomena
- Atomic and Molecular Physics
- Advanced Sensor Technologies Research
- Luminescence Properties of Advanced Materials
- Magnesium Alloys: Properties and Applications
- Ionosphere and magnetosphere dynamics
- Power Systems and Renewable Energy
- Thermal Radiation and Cooling Technologies
- High-Voltage Power Transmission Systems
- Wireless Body Area Networks
Laser Research Institute
2024
Helmholtz Institute Jena
2020-2024
North China Electric Power University
2021-2024
China Electric Power Research Institute
2021-2024
Shandong University
2011-2023
Lanzhou University
2023
Friedrich Schiller University Jena
2022
Shandong Transportation Research Institute
2020-2021
GSI Helmholtz Centre for Heavy Ion Research
2021
National Astronomical Observatories
2020
Abstract The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has passed national acceptance and finished one pilot cycle of ‘Shared-Risk’ observations. It will start formal operation soon. In this context, paper describes testing results key fundamental parameters for FAST, aiming to provide basic support observation data reduction FAST scientific researchers. 19-beam receiver covering 1.05–1.45 GHz was utilized most these fluctuation in electronic gain the system is better than...
By 3D particle-in-cell simulation and analysis, we propose a plasma lens to make high intensity, contrast laser pulses with steep front. When an intense, short Gaussian pulse of circular polarization propagates in near-critical plasma, it drives strong currents relativistic electrons which magnetize the plasma. Three shaping effects are synchronously observed when passes through lens. The intensity is increased by more than 1 order magnitude while initial profile undergoes self-modulation...
We report the experimental generation of highly energetic carbon ions up to 48 MeV per nucleon by shooting double-layer targets composed well-controlled slightly underdense plasma and ultrathin foils with ultraintense femtosecond laser pulses. Particle-in-cell simulations reveal that are ejected from due radiation pressure then accelerated in an enhanced sheath field established superponderomotive electron flow. Such a cascaded acceleration is especially suited for heavy ion The breakthrough...
We show a novel self-matching resonance acceleration regime for generating dense relativistic electron beams by using ultraintense circularly polarized laser pulses in near-critical density plasmas. When the self-generated quasistatic axial magnetic field is strong enough to pinch and trap thermal electrons, an overdense bunch formed center of channel. In trapping process, betatron frequencies phases can be adjusted automatically match condition. The matched electrons are accelerated...
Betatron radiation from direct-laser-accelerated electrons is characterized analytically and numerically. It shown here that the electron dynamics strongly dependent on a self-similar parameter S(≡n_{e}/n_{c}a_{0}). Both transverse momentum energy are proportional to normalized amplitude of laser field (a_{0}) for fixed value S. As result, total number radiated photons scales as a_{0}^{2}/sqrt[S] conversion efficiency accelerated a_{0}^{3}/S. The particle-in-cell simulations agree well with...
In this work, a novel narrow-band blue-emitting phosphor with high efficiency and thermal stability has been designed prepared.
We investigate the tunneling dynamics of Bose-Einstein condensates (BECs) in a symmetric as well tilted triple-well trap within framework mean-field treatment. The eigenenergies functions zero-point energy difference between wells show striking entangled star structure when atomic interaction is large. then achieve insight into oscillation solutions around corresponding eigenstates and observe several new types Josephson oscillations. With increasing interaction, Josephson-type blocked...
The Visible and Near-Infrared Imaging Spectrometer (VNIS), using two acousto-optic tunable filters as dispersive components, consists of a VIS/NIR imaging spectrometer (0.45–0.95 μm), shortwave IR (0.9–2.4 μm) calibration unit with dust-proofing functionality. VNIS was utilized to detect the spectrum lunar surface achieve in-orbit calibration, which satisfied requirements for scientific detection. Mounted at front Yutu rover, objects that are detected 45° visual angle obtain spectra...
The generation of high-current MeV carbon ions from plasma by using two sequential laser pulses has been investigated with the help three-dimensional particle-in-cell simulations. When first pulse drives expansion target, target-normal sheath acceleration happens, and accelerated are momentum-chirped. second an additional field, which a monotonically decreasing front. field moves together group chirped dechirps them, thereby making them quasi-monoenergetic. Simulations show that, total...
The significance of laser-driven polarized beam acceleration has been increasingly recognized in recent years. We propose an efficient method for generating proton beams from a pre-polarized hydrogen halide gas jet, utilizing magnetic vortex enhanced by plasma bubble. When petawatt laser pulse passes through bubble-like ultra-nonlinear wave is formed. As portion the particles constituting this wave, background protons are swept field bubble and oscillate significantly along propagation axis....
Abstract The mechanism for emergence of helical electron bunch(HEB) from an ultrarelativistic circularly polarized laser pulse propagating in near-critical density(NCD) plasma is investigated. Self-consistent three-dimensional(3D) Particle-in-Cell(PIC) simulations are performed to model all aspects the interaction including evolution, and ion motions. At a intensity 10 22 W/cm 2 , accelerated electrons have broadband spectrum ranging 300 MeV 1.3 GeV, with charge nano-Coulombs(nC) within...
We show that a high current quasi-monoenergetic electron beam and peaked brilliant gamma-ray can be generated by irradiating an ultra-intense laser pulse on uniform near critical density plasma, with spot radius RL∼(λ/π)2a/n, here λ is the wave length, denotes normalized intensity, n plasma density. Due to relativistic resonant phase locking mechanism, energy oscillating electrons are trapped ride electric field, unprecedented ultra-fast ultra-brilliant emitted from electrons. Both photons...
Three-dimensional fast magnetic reconnection driven by two ultraintense femtosecond laser pulses is investigated relativistic particle-in-cell simulation, where the paralleled incident beams are shot into a near-critical plasma layer to form configuration in self-generated fields. A $X$ point and out-of-plane quadrupole field structures associated with formed. The rate found be faster than that previous two-dimensional Hall magnetohydrodynamic simulations electrostatic turbulence...
ABSTRACT Random noise attenuation utilizing predictive filtering achieves great performance in denoising seismic data. Conventional methods are based on fixed filter operators and neglect the complexity of structures. In this way, denoised data cannot meet requirement balancing signal preservation removal. study, we proposed a structural complexity‐guided method that utilizes an adapted operator to adjust changes complexity. The mainly consists two stages. A slope field information is...
We study synchrotron radiation emission from laser interaction with near critical density (NCD) plasmas at intensities of 1021 W∕cm2 using three-dimensional particle-in-cell simulations. It is found that the electron dynamics depend on shaping process in NCD plasmas, and thus angular distribution emitted photons changes as pulse evolves space time. The final properties resulting radiation, such its overall energy, photon distribution, are strongly affected by polarization plasma density. By...
Wireless Body Area Networks (WBANs) are usually designed for pervasive healthcare applications. Since the primary traffic in WBAN is vital physiological signals, guaranteeing Quality of Service (QoS) crucial while designing WBAN. However, QoS will be degraded strong inter-WBAN interference environment such as hospitals and senior communities, where WBANs densely deployed. In this paper, by focusing on a more practical model, we propose non- cooperative power control game to mitigate inter-...
We investigate the dynamics of converting cold bosonic atoms to molecules when an external magnetic field is swept across a Feshbach resonance. Our analysis relies on quantum microscopic model that accounts for many-body effects in association process. show picture two-body molecular production depicted by Landau-Zener significantly altered due effects. In nonadiabatic regime, we derive analytic expression conversion efficiency explains discrepancy between prediction formula and experimental...
In the present letter, we propose design of a wedged-peak pulse at late stage indirect drive. Our simulations one- and two-dimensional radiation hydrodynamics show that wedged-peak-pulse can raise drive pressure capsule implosion velocity without significantly raising fuel adiabat. It thus balance energy requirement hydrodynamic instability control both ablator/fuel interface hot-spot/fuel interface. This investigation has implication in fusion ignition current mega-joule laser facilities.
Visible laser has been widely used in data storage, optical communication, display, medical treatment, printing, and scientific research.With the development of commercial blue light LD, direct pumping rare-earth ions doped crystals have attracted a lot interests.Currently, visible mainly concentrat on Pr 3+ , Dy Tb Sm .Trivalent praseodymium (Pr ) is famous ion with extensive transitions region such as blue, green, red orange light.However, there still yellow emission which not covered by...