A5101793995- Vacuum and Plasma Arcs
- Metal and Thin Film Mechanics
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Particle accelerators and beam dynamics
- Laser-induced spectroscopy and plasma
- Advanced Sensor Technologies Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Electrostatic Discharge in Electronics
- Ion-surface interactions and analysis
- Nuclear Physics and Applications
- Laser-Matter Interactions and Applications
- Quantum Chromodynamics and Particle Interactions
- Plasma Applications and Diagnostics
- Particle physics theoretical and experimental studies
- Advanced materials and composites
- High-pressure geophysics and materials
- Semiconductor Quantum Structures and Devices
- Magnetic confinement fusion research
- Advancements in Semiconductor Devices and Circuit Design
- Diamond and Carbon-based Materials Research
- Quantum Information and Cryptography
- High-Energy Particle Collisions Research
- Quantum Computing Algorithms and Architecture
University of Electronic Science and Technology of China
2025
Institute of Semiconductors
2025
Chinese Academy of Sciences
2025
University of Chinese Academy of Sciences
2025
China Academy of Engineering Physics
2014-2024
China General Nuclear Power Corporation (China)
2023
Institute of Fluid Physics
2012-2021
Institute of High Energy Physics
2012-2018
Chinese Academy of Engineering
2015
National Academy Foundation
2013
Abstract InSb is an excellent material for studying topological quantum computing, infrared optoelectronics, and spintronics. Controllable growth of high‐quality, large‐scale nanowire networks the basis these applications. However, selective window epitaxial do not overlap when they are grown by molecular‐beam epitaxy. So far, controlled high‐quality still remains a challenge. Here, groove‐guided area technique proposed network on Ge substrates Different from traditional planar technology,...
The use of a short-pulse petawatt (PW) laser (τL<200 fs, wavelength ≈1 μm) enables experimental realization self-guided, multi-centimetre-long multi-GeV wakefield electron accelerator. A comprehensive set numerical simulations showed that 150 1.33 PW pulse is self-guided over 10 cm static filling gaseous plasma density 1–3×1017 cm−3 and stable against relativistic filamentation. fully broken electromagnetic wake (electron 'bubble') excited the entire interaction length. Variations bubble...
We demonstrate a frequency-domain streak camera (FDSC) that captures the picosecond time evolution of luminal-velocity refractive index structures in single shot. In our prototype FDSC, probe-reference pulse pair propagates obliquely to subpicosecond pump creates an evolving nonlinear structure glass, supplementing conventional holographic copropagates with pump. A spectrometer acquires data from both pairs via spatial or temporal multiplexing, demonstrating feasibility compact tomographic...
We report 'snapshots' of laser-generated plasma accelerator structures acquired by frequency domain holography (FDH) and shadowgraphy (FDS), techniques for visualizing quasi-static objects propagating near the speed light. FDH captures images sinusoidal wakes in mm-length plasmas density 1<ne <5×1018 cm−3 from phase modulations they imprint on co-propagating probe pulses. Changes wake structure (such as curvature wavefront), caused laser parameter variations shot to shot, were observed. FDS...
The ionization rate of the released deuterium from a metal deuteride cathode in vacuum arc discharges is investigated by both experiments and modeling analysis. Experimental results show that increases 2% to 30% with increasing current range 2–100 A. Thus full assumption, as widely used plasma simulations, not satisfied for at low discharge current. According results, neutral-to-ion conversion efficiency traveling across cathodic spot region can be significantly less than one, due fast...
Multilayer dielectric barrier discharge (DBD) can efficiently enlarge the volume of homogeneous plasma and its interactional surface area with materials in vertical space, which seems attractive to industry application. In this paper, a new generator DBD structure has multilayers boards excited by repetitive submicrosecond pulsed power (0 -100 kV, 130 Hz-1 kHz, pulsewidth 230 ns, rise time 120 ns) is introduced, been obtained atmospheric pressure air. Experiments on high-speed photography an...
The pulsed ion beam from a vacuum arc source in compact sealed-tube neutron generator owns many special features, such as multiparticle mixture beams, high-intensity short pulsewidth transporting single gap acceleration system, and eccentric beams. Beam profile composition are useful information for designing generator, especially the insulation withstand of device, life tritium target, yield, so on. An improved traditional online diagnostic method that uses an aluminum-coated scintillator...
Electron density bubbles generated in plasma of ne∼1019/cm3 are shown to reshape copropagating probe pulses into optical "bullets." The bullets, reconstructed by frequency‐domain interferometric techniques, used visualize bubble formation independently relativistic electron generation.
The mode transition of a pulsed vacuum arc discharge, which is from surface flashover to non-surface breakdown or vice versa, studied by simply adjusting trigger resistor. This approach provides possibility research the discharge process. Since process smooth and controllable, mechanism its effect on performance an ion source can be investigated via various diagnosis experiments. experimental results show that occurs when resistance in range 0–10Ω. With breakdown, becomes more intense...
Axial symmetry of discharge is very important for application vacuum arc plasma. It discovered that the triggering method a significant factor would influence at final stable stage. Using high-speed multiframe photography, transition processes from cathode-trigger to cathode-anode were observed. shown performances two methods investigated are quite different. Arc triggered by independent electric source can be stabilized center anode grid, but it difficult achieve such good through...
A Penning ion source with self-heated cathodes has been applied in a miniature cyclotron. Optimizing the formation of negative hydrogen ions needs knowledge plasma parameters. Optical emission spectroscopy is introduced as noninvasive and situ diagnostic tool for line-of-sight averaged parameters this paper. The relative intensities neutral atomic spectral lines are used to evaluate electron temperature plasma. experimental results show that Balmer (H <sub...
A Penning ion gauge (PIG)-type source has been used for the generation of negative hydrogen ions (H−) as internal compact cyclotron. The discharge characteristics are systematically studied operation at different currents and gas flow rates on prototype preliminary study results low DC voltage H− extraction measurements presented in this paper. beam current is measured by order magnitude from several tens to hundreds microamperes parameter conditions. discussion analysis experimental good...
Surface modification technique of secondary electron emission (SEE) characteristics materials, which is utilized to suppress or promote the SEE from material surface under bombardment, has extensive applications in a variety fields. Measurement yield (SEY) and spectrum (SES) before after essential for evaluation effectiveness investigation mechanism modification. A SEY SES measurement system reported this article. The comparative measurements total SEY, true backscattered yield, nickel...