A5101545489- Advanced Fiber Laser Technologies
- Gyrotron and Vacuum Electronics Research
- Advanced Photonic Communication Systems
- Particle accelerators and beam dynamics
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Magnetic Bearings and Levitation Dynamics
- Physics of Superconductivity and Magnetism
- Photonic Crystal and Fiber Optics
- Plasma Diagnostics and Applications
- Pulsed Power Technology Applications
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- High voltage insulation and dielectric phenomena
- Electrostatic Discharge in Electronics
- Supercapacitor Materials and Fabrication
- Magnetic and transport properties of perovskites and related materials
- Advancements in Battery Materials
- Glass properties and applications
- GaN-based semiconductor devices and materials
- Methane Hydrates and Related Phenomena
- X-ray Diffraction in Crystallography
- Vagus Nerve Stimulation Research
- Microbial Inactivation Methods
- Remote Sensing and Land Use
First Affiliated Hospital of Xinjiang Medical University
2018-2025
Xinjiang Medical University
2018-2025
Guangxi University
2025
Academy of Military Medical Sciences
2019-2024
Jingzhou Central Hospital
2023
PLA Academy of Military Science
2021-2023
National University of Defense Technology
2013-2021
Northeastern University
2021
Tsinghua University
2019
Beijing Academy of Quantum Information Sciences
2019
A 45-m-long high-temperature superconducting (HTS) Maglev ring test line, named "Super-Maglev," has been successfully developed in Chengdu, China, February 2013, 12 years after the birth of first man-loading HTS vehicle. The vehicle (2.2 m length, 1.1 width) is designed for one passenger with a levitation height 10–20 mm; permanent-magnet guideway (PMG) (45 0.77 track gauge) racetrack shape curve radius 6 m; driving accomplished by linear induction motor maximum running speed 50 km/h....
By in situ reduction to deposit Bi onto BiVO 4 , x 0 /BiVO not only retains the photocatalytic properties but also exhibits photosensitizer characteristics; furthermore, adsorption of reactants and other are enhanced.
A sub-100 fs all-fiber broadband optical frequency comb seeded from a 12.5 GHz electro-optic modulated pulse is presented. Combining reshaping, nonlinear mixing with dispersion compensation processes, the main width of 86 was achieved. The has 6 dB spectral bandwidth spanning over 150 nm which corresponding to more than 1500 tones. measured average power 550 mW, and calculated each line roughly -4 dBm. To illustrate whole broadening process, numerical investigation also brought out, showing...
In order to design high temperature superconducting (HTS) maglev launch system, three NdFeB permanent magnetic guideways (PMGs) are investigated and compared for the better levitation forces guidance forces. The laboratory-scale HTS system was designed developed successfully in Applied Superconductivity Laboratory (ASCLab), Southwest Jiaotong University, China. cooling process of melt-textured YBaCuO bulk superconductors is made a big low tube, which connected with PMG. method merit...
A compact environmentally-stable mode-locked figure-9 fiber laser is reported in this paper. The cavity composed of only two all-polarization-maintaining components, which enjoys a concise and stable structure. As result, vibration-immune fundamental single-pulse mode-locking operation can always be observed. pulse repetition rate was measured to 201.14 MHz much higher than the most previous works. output also have center wavelength/3-dB spectral bandwidth/radio frequency signal noise...
The KIT two-dimensional beam optics code ESRAY is an efficient tool for the design and optimization of magnetron injection guns collectors gyrotrons or comparable vacuum tubes. applied numerical methods latest modifications enhancements will be presented. To achieve more realistic results, a new emitter surface roughness model treatment secondary electrons has been implemented recently. An extension to three dimensions (without taking space-charge effects into account) permits simulation...
Identification and control of topological phases in thin films offer great opportunities for fundamental research the fabrication topology-based devices. Here, combining molecular beam epitaxy, angle-resolved photoemission spectroscopy, ab initio calculations, we investigate electronic structure evolution (Bi1-xInx)2Se3 (0 ≤ x 1) with thickness from 2 to 13 quintuple layers. By employing both In substitution as two independent "knobs" gap change, identify between several phases, i.e.,...
Because of the disadvantages existing permanent magnetic guideway (PMG) such as low efficiency, a Halbach PMG is proposed to improve levitation performance high-temperature superconducting (HTS) (maglev) vehicle. Magnetic induction calculated by an analytical method. The screening current density distribution in superconductor solved with flux flow-creep model finite-element method, and then force between HTS bulk Lorentz formula. According characteristic maglev vehicle, optimality criterion...
Abstract Emitter surface roughness is one of the important factors electron beam degradation in magnetron injection gun (MIG) and decrease gyrotron efficiency. This paper surveys influence emitter on operation EU 1 MW 170 GHz for ITER two different designs. The was taken into account using a simple model. ESRAY code used simulation EURIDICE calculation RF interaction cavity. quality due to quantitatively studied and, furthermore, efficiency mode competition are investigated. Some dramatic...
In order to evaluate the emission inhomogeneity of thermionic gyrotron cathode emitters, a novel definition and evaluating method from current-voltage characteristics is described in this paper. Results for three different types oscillators at emitter temperatures based on experimental data mathematical treatment are considered investigation. The influence efficiency numerically calculated using 3-D codes ARIADNE EURIDICE. upper limits distributions work function, temperature, electric field...
On the road to portable pulsed power generators, application of ceramic capable high energy density in storage for pulse forming line has aroused great enthusiasm research group technology. The niobate glassceramic investigated this paper is promising applications parallel-plate, stacked Blumleins, which represents an alternative achieve required compactness devices. Experiments testing its breakdown characteristics have been performed on platform named ARC-01 with ability output repetitive...
The effect of the emitter surface roughness on quality an electron beam emitted by a gyrotron magnetron injection gun (MIG) has been studied. Several different shapes microstructures (imperfections) have modeled surface. A modified version two-dimensional, finite-difference optics code ESRAY used for numerical simulations. Results and sizes are shown.
Beyond ITER, a future nuclear fusion demonstration power plant (DEMO) demands gyrotron frequencies above 200 GHz and efficiencies of higher than 60 %. The unit must well exceed 1 MW. Fast frequency tunability in steps 2-3 (in few seconds) using broadband or tunable CVD-diamond windows is required. Beside these fundamental requirements, slow minutes) leaps 30-40 GHz, related to the transmission maxima plane considered be advantageous for possible multi-purpose use gyrotrons. Initial...
To examine the structural differences in regional gray matter density between a sample of major depressive disorder (MDD) and healthy controls, using magnetic resonance imaging (MRI) to find base pathophysiologic mechanism depression development.A total 38 MDD patients 42 subjects enrolled MRI scans. Voxel-based morphometry was used test difference 2 groups.The group showed significantly lower than control right middle frontal gyrus, superior left inferior gyrus gyrus. However, precuneus,...
Analog photonic channelized receivers based on dual optical frequency combs (DOFC) are widely used in microwave wideband signal processing. It uses means to perform narrowband segmentation of the spectrum, thus avoiding tradeoff between speed, bandwidth, and accuracy ADC. However, many factors such as link noise device nonlinearity restrict dynamic range system, affecting detection processing performance. In this paper, a Long-Short-Term-Memory-Residual network (LSTM-Resnet) is designated...
In order to evaluate the emission inhomogeneity of a thermionic gyrotron emitter, three mathematical treatments current-voltage characteristics (CVC) have been investigated and will be presented in this paper. Results for different gyrotrons emitter temperatures based on experimental data treatment considered. The relation between effective work function distribution is numerically calculated.
We report a passively Er3<sup>+</sup>-doped mode-locked fiber laser based on repetition rate multiplication, in which three-stage Mach Zehnder interference structure is employed as multiplier. The initial soliton pulses are generated from ring cavity with fundamental of 102.70 MHz, seed laser. When the intrinsic frequency multiplier almost aligned variable optical delay line, output laser, lifted 100.20 MHz to 801.03 MHz. This result demonstrates method achieve high (> 500 MHz) pulse...
In this article, a photonic microwave signals generation scheme for background-free phase-coded (PC) radar pulse with multioctave tuning is experimentally demonstrated. Firstly, an optical frequency comb (OFC) demultiplexing technology based on injection locking (OIL) provides power-equalized coherent local oscillator (LO) ultra-broadband capability. Then, phase-modulated signal produced the conversion intensity modulation to phase modulation. Finally, can be obtained by beating LO at...
The output power, efficiency and stability of high power CW gyrotrons depend strongly on the quality electron beam generated by magnetron injection gun. To understand deteriorating effects like low frequency oscillations or generation an halo, KIT in-house optics code ESRAY [1] has been extended from a pure 2D electrostatic raytracing to advanced quasi-static particle-in-cell code, capable handling slowly varying transient effects. In addition, new emitter surface roughness model [2]...
New superconductor materials have been constantly found since the discovery of superconductivity in 1911. With critical temperature and inherent flux-pinning property improved continually, practical high superconducting (HTS) magnetic levitation (maglev) technology rail transit became possible. The development history current state HTS Maglev Applied Superconductivity Laboratory (ASCLab) are elaborated detail. On basis test vehicle "century" born 2000, improvements new technologies need to...
The optical filters are studied according to the applications of photonic-assisted radio frequency (RF) signal gereration and all coherent processing. Firstly, finite impulse response (FIR) filter is analyzed theoretically. And it points out that advantages FIR lies in reconfiguration, real coefficients linear-phase which could guarantee coherence ultrashort pulse. Based on this, specific for free spectral range (FSR) broadening sinusoidal generation designed simulated. results simulation...