A5070809563- Gyrotron and Vacuum Electronics Research
- Pulsed Power Technology Applications
- Particle accelerators and beam dynamics
- Environmental Changes in China
- Membrane-based Ion Separation Techniques
- Advancements in Battery Materials
- Microwave Engineering and Waveguides
- Electromagnetic wave absorption materials
- Advanced Battery Materials and Technologies
- Coastal wetland ecosystem dynamics
- Metamaterials and Metasurfaces Applications
- Membrane Separation Technologies
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- Advanced Antenna and Metasurface Technologies
- Environmental Quality and Pollution
- Plant Ecology and Soil Science
- Insects and Parasite Interactions
- Text and Document Classification Technologies
- Electrical Contact Performance and Analysis
- Nephrotoxicity and Medicinal Plants
- Transport Systems and Technology
- Traditional Chinese Medicine Analysis
- Plasma Applications and Diagnostics
- Structural Behavior of Reinforced Concrete
Hubei University of Science and Technology
2025
Hunan University of Traditional Chinese Medicine
2025
Northwest Institute of Nuclear Technology
2018-2023
Shandong University of Technology
2021-2022
Tsinghua University
2020
Shandong University of Art and Design
2018
Nanjing Normal University
2015
Jilin University
2014
An X-band dual-mode relativistic backward wave oscillator (RBWO) operating at low magnetic field is presented in this paper. Three new design principles are introduced the device. First, electron beam interacts with TM01 mode and TM02 simultaneously, rather than a fixed single mode. Second, device outputs mixed modes, pure Third, an internal reflector inserted into annular cathode, long resonant before slow-wave structure, adopted to reflect part of wave. Accordingly, beam–wave interaction...
An oversized mode-selective relativistic backward wave oscillator is proposed. This device operates using the pure TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">02</sub> mode in beam-wave interaction area and transmits a xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> output waveguide. In area, selection well realized through slow-wave structures with coaxial inner conductor that provides perfect boundary conditions for simultaneously...
Monolithic carbon electrodes with robust mechanical integrity and porous architecture are highly desired for capacitive deionization but remain challenging. Owing to the excellent strength electroconductivity, commercial fibers cloth demonstrates great potential as high‐performance ions storage. Despite this, its direct application on is rarely reported in terms of limited pore structure natural hydrophobicity. Herein, a powerful metal‐organic framework‐engaged structural regulation strategy...
An <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${X}$ </tex-math></inline-formula> -band superradiant relativistic backward-wave oscillator (RBWO) operating at a low magnetic field with power conversion efficiency exceeding unity is proposed. The device improved from two aspects: beam transmission stability focused by guiding and microwave efficiency. First, gradually decaying axial applied. It could not...
The design and preliminary results for a C-band relativistic backward wave oscillator (RBWO), which is magnetically well insulated, are presented. Under an external magnetic field of 0.36 T, the RBWO generated high power microwave radiation with 3.3 GW frequency 4.37 GHz diode voltage 870 kV beam current 13.5 kA. electric on surface cathode holder was below emission threshold, inlaid graphite designed to suppress shunting in area. device, operating low insulation, promising candidate use as...
Two-phase heterostructures have received tremendous attention in energy-related fields as high-performance electrode materials. However, heterogeneous interfaces are usually constructed by introducing foreign elements, which disturbs the investigation of intrinsic effect two-phase heterostructure. Herein, unique with orthorhombic NiSe2 and cubic phases developed, embedded situ formed porous carbon from metal-organic frameworks (MOFs) (O/C-NiSe2@C). Precisely-controlled selenylation MOFs is...
The effect of the local electric field on radial oscillation electron beam in low-magnetic-field foilless diode is studied theoretically and experimentally. results obtained with different methods show good coherence. amplitude affected by depends intensity phases electrons entering leaving region. It found that enhanced near drift tube head change anode-cathode gap. Meanwhile, a method to effectively suppress proposed. Optimizing gap tilt angle can adjust matching state phase field, thus...
In this article, the effect of microwave leakage into diode region on suppression backward current in a relativistic wave oscillator (RBWO) operating at low magnetic field is investigated by theoretical analysis, particle-in-cell (PIC) simulation, and experiments. The results show that some electrons are absorbed cathode holder due to leakage, as power increases, frequency guiding decreases, it will promote absorption electrons. PIC simulations based first principle reveal partially...
The relativistic backward wave oscillator (RBWO) is one of the most important high-power microwave generators. Its stability and reliability must be further improved to meet demands key applications. factors that limit its performance are varied but include radio frequency breakdown mode competition. Based on a C-band RBWO, competition was carefully analyzed effects RBWO were revealed. As shown in studies, for an axisymmetric system, asymmetric probably still exists. Therefore,...
Abstract A theory regarding a non-uniform magnetic field with parallel gradient is presented. The research results show that proper can greatly reduce the transverse momentum of an electron beam and even eliminate its gyration motion, it depends on phases electrons entering leaving local region. Thus, decreases along axial direction proposed to suppress radial oscillation beam. However, in drift tube, suppression not obvious, because large phase differences among lead mismatch between field....
A klystron-like relativistic backward-wave oscillator (KL-RBWO) with transverse electron beam confinement and waveguide reflection, which works well under a magnetic-field strength below that of the cyclotron resonance, is proposed.For this device operating low magnetic field, effective suppression velocity beams introduced by local electric field near tube head, to promote modulation uniformity beams.Part reflected microwave from output provides feedback enhancement extractor, strengthens...
An annular cathode is generally fixed on a cylindrical holder in magnetically insulated coaxial foilless diode. Electrons emitted from plasmas or the may easily move backward under action of quasi-static electric field and axial magnetic field, leading to current loss, which will seriously reduce efficiency high power microwave sources, especially condition low guiding field. A novel storage electrode immersed uniform proposed suppress current. Reverse electrons be decelerated blocked by...
Abstract Microwave breakdown has always been a huge challenge to the development of high-power microwave (HPM) sources. Some unique phenomena in novel and powerful overmoded relativistic backward wave oscillator (RBWO) operating at low magnetic field are demonstrated. Three different mechanisms utilized explain these through detailed electromagnetic calculation particle-in-cell demonstration effective methods applied or suggested mitigate breakdown. The slow structure (SWS) mainly results...