A5100342028- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Electrostatic Discharge in Electronics
- Superconducting Materials and Applications
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Noise Suppression
- Semiconductor materials and devices
- Advanced Fiber Optic Sensors
- Photocathodes and Microchannel Plates
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Plasma Diagnostics and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Measurement and Detection Methods
- Semiconductor Lasers and Optical Devices
- Magnetic confinement fusion research
- Photonic and Optical Devices
- Laser Design and Applications
- Antenna Design and Analysis
- Optical Systems and Laser Technology
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Multi-Objective Optimization Algorithms
- Infrared Target Detection Methodologies
- Particle Detector Development and Performance
State Key Laboratory of Nuclear Physics and Technology
2011-2025
Peking University
2015-2025
Key Laboratory of Nuclear Radiation and Nuclear Energy Technology
2010-2024
University of Hong Kong
2024
Shenzhen University Health Science Center
2024
Shenzhen Second People's Hospital
2024
China Southern Power Grid (China)
2024
Panasonic (Japan)
2023
CRRC (China)
2021
GlobalFoundries (United States)
2018-2021
JEDEC has introduced the Per Row Activation Counting (PRAC) framework for DDR5 and future DRAMs to enable precise counting of DRAM row activations. PRAC enables a holistic mitigation Rowhammer attacks even at ultra-low thresholds. uses an Alert Back-Off (ABO) protocol request memory controller issue requests. However, recent implementations are either insecure or impractical. For example, Panopticon, inspiration PRAC, is rendered if implemented per JEDEC's specification. On other hand, UPRAC...
Infectious diseases pose a major challenge to public health worldwide. In recent years, vector-borne and zoonotic have emerged as threats. Effective prevention, control, essential monitoring strategies are required combat the rising global incidence prevalence of infectious diseases. The frequency disease outbreaks has increased in past several decades, this trend been predicted be likely continue. To effectively identify threats, monitor alert against diseases, we obtained surveillance data...
The performance of ultrafast scintillators under ultrahigh dose rate is highly important for applications utilizing brilliant radiation sources. In this work, the scintillation properties β-Ga2O3, a high-performance wide-bandgap semiconductor scintillator, are systematically investigated rates 107 to 109 Gy/s first time by employing ultrashort high-charge electron bunches (bunch charge from 500 fC 50 pC) generated superconducting radio-frequency accelerator. Our results show that in spite...
Nb3Sn has a superconducting transition temperature of 18.1 K and superheating magnetic field 420 mT, making it one the most promising materials for radiofrequency (SRF) cavities. The surface roughness reduction mechanical stability films are two important issues to improve cavity RF performance reliability in application conduction-cooling accelerators. This paper presents studies on prepared by tin vapor diffusion method proves advantages buffered electropolishing (BEP) as pre-polishing...
In underwater applications of contactless power transmission (CLPT) systems, high pressure and noncoaxial operations will change the parameters electromagnetic (EM) couplers. As a result, system divert from its optimum performance. Using reluctance modeling method, we investigated gap effects on EM coupler in deep-sea environment. Calculations measurements were performed to analyze influence alignments coupler. It was shown that it is useful set relatively large between cores reduce...
Nb3Sn-coating experiments on samples and single-cell cavities were conducted at Peking University (PKU) to understand the Nb3Sn growth process using vapor diffusion method. The evaporation of tin chloride used in was simulated experimentally analyzed. results show that nucleation is generally uniform, atomic ratios Nb/O Sn/O found be 1:2 within 10 nm surface nucleated samples. Three sources distributed along cavity axis obtain a uniform grain size surface, content 25~26% achieved....
High-brightness megahertz-rate electron beams are highly desired for cutting-edge applications in many areas of science. Photocathode guns capable generating such with low dark current remain to be a challenging field. In this paper, we report breakthroughs hybrid gun combining direct-current gap and superconducting radio-frequency (SRF) cavity. The gun, employing <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:msub><a:mrow><a:mi...
A liquid helium-free cryostat for radio frequency (RF) test of the superconducting cavity is designed and constructed. Gifford-Mcmahon (G-M) cryocoolers are used to provide cooling capacity, heat leakage at 4 K less than 0.02 W. Vertical horizontal tests two Nb3Sn cavities carried out in with different surface treatments outside cavities. Both achieve stable continuous wave (CW) operation. novel treatment, which cold-sprayed a 3.5 mm thick Cu layer onto cavity, enables maintenance an average...
Electrostatic discharge (ESD) failure is a major reliability problem, and ESD protection an emerging design challenge for radio-frequency (RF) integrated circuits demanding extremely high wireless applications in harsh environments. This paper reports the optimization of 5-kV ESD-protected 2.4-GHz power amplifier (PA) circuit 0.18-μm RFCMOS technology. A new mixed-mode simulation-design method accurate RF characterization technique are used to minimize inevitable ESD-induced parasitic...
This paper reports design, analysis and optimization of a new low-parasitic, very-low-triggering-voltage dual-directional silicon-controlled rectifier (VLTdSCR) type electrostatic discharge (ESD) protection structure its cross-coupling ultra-low-triggering ESD circuitry (CULTdSCR) implemented in commercial 0.18 μm CMOS. Mixed-mode simulation-design technique is used to verify the embedded punch-through gate trigger-assisting techniques devised achieve ultra-low triggering for SCR-type...
This paper presents the design of a low-power single-full-band (3.1-10.6 GHz) noncarrier impulse-radio ultra-wideband (UWB) transmitter (TX) implemented in commercial 0.18-μm CMOS technology. UWB TX features fifth-order Gaussian derivative pulse shaping, integrated binary phase-shift keying modulation and 2.5-kV whole-chip electrostatic discharge (ESD) protection. Measurement shows full function with very small die size 0.25 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
This letter reports the proof-of-concept results for new nontraditional nanophase-switching electrostatic-discharge (ESD) protection mechanism and nanocrossbar ESD structures. Experiment shows good switching protection, i.e., a fast response of 100 ps, ultralow leakage 0.26 pA, an >; 267 V/μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . A dispersed local tunneling model is proposed, heterogeneous complementary...
This paper presents a kind of passive wireless pressure sensor comprised planar spiral inductor and cavity parallel plate capacitor fabricated through low-temperature co-fired ceramic (LTCC) technology. The LTCC material with low Young’s modulus ~65 GPa prepared by our laboratory was used to obtain high sensitivity. A three-step lamination process applied construct quality structure without using any sacrificial materials. effects the thickness sensing membranes on sensitivity detection...
Vehicle-to-everything (V2X) can improve the road safety, traffic efficiency, and availability of infotainment services. Standardization Long Term Evolution (LTE)-V2X has been actively conducted by Third Generation Partnership Project (3GPP) to provide solutions for V2X. In this paper, challenges detailed design issues in LTE V2X are discussed. The performance comparison LTE-V2X IEEE 802.11p is presented typical urban freeway scenarios.
Abstract Three 1.3 GHz nine-cell large-grain superconducting niobium cavities were investigated with medium-temperature baking, using buffered chemical polishing to remove the impurity profiles from previous heat treatments. The average intrinsic quality factor in 2 K vertical tests of was 2.7 × 10 at 16 MV m −1 maximum accelerating gradients 20–22 . These promising values confirmed effectiveness an improved baking recipe for cavities, beneficial radiofrequency applications. Furthermore,...
Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, cosmology. We report the first use of tunable niobium superconducting radio-frequency cavity scan photon matter with innovative data analysis techniques. mechanically adjusted resonant frequency submerged liquid helium at temperature 2 K, scanned mass over range 1.37 MHz centered 1.3 GHz. Our study leveraged cavity's remarkably high quality factors...
Passive Optical Network (PON) with cascaded optical amplifier (OA) and splitter has been reported as a promising strategy to support low-cost deployment of long-reach Networks (LRPONs), which is one the keys enable fiber premises (FTTP) service provisioning scenario. This paper investigates challenging network planning dimensioning (NPD) task, where proper link budget correlated optimal splitters/OAs placement are jointly considered under OAs splitters. Different previous PON-related...