A5045530508- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Magnetic confinement fusion research
- Atomic and Molecular Physics
- Particle accelerators and beam dynamics
- Nicotinic Acetylcholine Receptors Study
- Fusion materials and technologies
- Ion channel regulation and function
- Advanced X-ray Imaging Techniques
- Ion-surface interactions and analysis
- stochastic dynamics and bifurcation
- High-pressure geophysics and materials
Dalian University of Technology
2019-2025
The study of beam–plasma interactions is important in many research fields, such as astrophysics, inertial confinement fusion, and high-energy density physics. Considering the significant impact electromagnetic fields on evolution systems, comprehensive three-dimensional modeling system needed. In this work, a relativistic particle-in-cell code IBMP3D developed for investigations beam transport plasmas. To save computation time achieve fast simulation, dynamic array data structure combined...
Potassium ion channels are essential elements in cellular electrical excitability and help maintain a resting potential nonexcitable cells. Their universality is based on unique combination of strong selectivity for K^{+} ions near-diffusion-limited permeation efficiency. Understanding how the channel regulates conduction would be instructive to treatment channelopathies. In this work, by means molecular dynamics simulations, we demonstrate significantly enhanced KcsA reaction an external...
The propagation of low energy continuous ion beams through background plasmas is studied numerically using a three-dimensional particle-in-cell code. It found that after the well known self-modulation effect, secondary occurs, leading to trimodal spectrum beam. accuracy “focusing regions” concept by comparing phase relation wakefield and beam density. Furthermore, form induced two counter-propagation verified.
An accurate understanding of ion-beam transport in plasmas is crucial for applications inertial fusion energy and high-energy-density physics. We present an experimental measurement on the spectrum a proton beam at 270 keV propagating through gas-discharge hydrogen plasma. observe energies protons changing as function plasma density broadening due to collective beam-plasma interaction. Supported by linear theory three-dimensional particle-in-cell simulations, we attribute this modulation...
An accelerator electron bunch is focused and modulated in a plasma lens then converted into gamma-ray source using bremsstrahlung radiation dense material. In the linear regions with beam density much smaller than density, proper needs to be chosen produce high quality small spot size low divergence, which can applied radiograph of complex objects sub-millimeter resolution. As charge increases approaches micro-bunching due nonuniform transverse wakefield energy chirp observed, leading...
The energy deposition of laser-accelerated proton beams in solid-density plasmas with different ion charge numbers is studied detailed one-dimensional particle-in-cell simulations. In the plasma a high number, which collision frequency approaches electron oscillation frequency, beam protons are strongly decelerated by electric field induced return current. further enhanced as travel distance increases due to density self-steeping, also confirmed multi-dimensional simulation. A simple...
Abstract The study of the interaction between ion beam and plasma is very important to areas inertial fusion energy high density physics. With detailed one-dimensional electromagnetic particle-in-cell simulations, we investigate here a laser-accelerated proton assuming an ideal monoenergetic with gas-discharge plasma. After saturation stage two-stream instability excited by beam, significant electrons are observed, maximum approaching 2 MeV, new occurs background electrons. trajectories...
Ion energy loss in the interaction between highly charged ions and dense plasma near Bohr velocity region is one of important physical problems field high-energy density physics driven by intense heavy ion beams. Based on 320 kV experimental platform at Institute Modern Physics, Chinese Academy Sciences, a new setup was built for research laser-produced velocity, where charge state distribution can be experimentally investigated. In this paper we introduce detail, including generation...
The interaction of a Doppler-boosted laser with solid-density plasma is investigated two-dimensional particle-in-cell simulations, special attention paid to the influences incident angle on yield e+/e− pairs. With normal incidence, it found that parts electrons are accelerated by reflected and radiate high-energy γ-photons, which further make nearly head-on collisions subsequent incoming pulses. nonlinear quantum parameters produced photons can reach 4.6, pairs increases factor 4 compared an...
Abstract Spectra and emission efficiencies of x-rays produced by hot electrons (hot- e ’s) with drift Maxwellian distribution are studied using both analytical numerical methods. The analytic expressions particularly useful for the analysis x-ray spectra hot- ’s in laser-produced plasma. Both results show that when have a nonzero velocity, bremsstrahlung spectrum is still approximately linear function logarithmic coordinates, which indicates process inferring temperature from slope needs to...