A5100705255- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Advanced Antenna and Metasurface Technologies
- Electromagnetic wave absorption materials
- Phase Change Materials Research
- nanoparticles nucleation surface interactions
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Piezoelectric Actuators and Control
- Semiconductor Quantum Structures and Devices
- Metamaterials and Metasurfaces Applications
- Flame retardant materials and properties
- Electric and Hybrid Vehicle Technologies
- Advanced Data Storage Technologies
- Adaptive optics and wavefront sensing
- Thermal Radiation and Cooling Technologies
- Adaptive Control of Nonlinear Systems
- Textile materials and evaluations
- Phase-change materials and chalcogenides
- Advanced Manufacturing and Logistics Optimization
- Radiation Effects in Electronics
- Geoscience and Mining Technology
Zhengzhou University
2025
Institute of High Energy Physics
2011-2024
Chinese Academy of Sciences
2011-2024
China Building Materials Academy
2024
University of Chinese Academy of Sciences
2014-2024
Shanghai Electric (China)
2023
Abstract Cold welding of metals at the nanoscale has been demonstrated to play a significant role in bottom‐up manufacturing and self‐healing processes nanostructures nanodevices. However, mechanism is not well understood. In this study, comprehensive demonstration cold process gold nanorods with different modes presented through situ liquid cell transmission electron microscopy. The experimental results molecular dynamics simulations reveal that are welded facet‐dependent atomic surface...
A low-frequency superconducting cavity is needed in main accelerators for storage ring light sources with ultralow emittance. compact 166.6 MHz proof-of-principle was designed adopting a quarter-wave β = 1 geometry High Energy Photon Source (HEPS). It 6 GeV diffraction-limited synchrotron source currently being developed at the Institute of Physics. The exceedingly size yet possessing low resonant frequency. nearest higher order mode largely separated from fundamental, making an attractive...
A superconducting 166.6 MHz quarter-wave beta=1 cavity was recently proposed for the High Energy Photon Source (HEPS), a 6 GeV kilometer-scale light source. Four cavities will be used main acceleration in newly planned on-axis beam injection scheme realized by double-frequency RF system. The fundamental frequency, MHz, dictated fast kicker technology and preference of using 499.8 SC as third harmonic. Each operated at 4.2 K providing 1.2 MV accelerating voltage 150 kW power to electron beam....
The storage ring of the high energy photon source will be driven by five 166.6 MHz β = 1 quarter-wave superconducting cavities operating at 4 K. A higher-order-mode-damped cavity was designed with excellent rf and mechanical properties based on successful development proof-of-principle cavity. design dressed focused addressing stress safety throughout processes, tunability, frequency detuning due to pressure fluctuation, Lorentz force, among other factors. new liquid helium vessel along a...
CEPC is a 100-km double-ring circular electron–positron collider operating at 90–240 GeV center-of-mass energy of Z-pole, WW-pair production threshold and Higgs resonance. The conceptual design report (CDR) has been published as an important step to move the project forward. superconducting RF (SRF) system one most challenging accelerator systems due wide range beam current. In this paper, layout, parameters configuration for ring will be introduced. Issues cavity interactions including...
Superconducting β=1 quarter-wave geometry of 166.6 MHz has been proposed as main accelerating cavities for the high-energy photon source (HEPS) storage ring. HEPS is a 6-GeV kilometer-scale synchrotron light promising ultralow emittance currently being constructed in Beijing. A proof-of-principle cavity previously in-house developed and vertical-tested achieving excellent cryogenic performances. helium jacket was subsequently designed adopting simple structure an integrated magnetic field...
An RF power coupler is a key component of the superconducting accelerating system in Chinese ADS proton linac injector I, which used to transmit 15 kW from source HWR cavity. According requirement working frequency, level, transmission capability and cooling condition, physics design has been finished, includes structure optimization, thermal simulation, stress analysis so on. Based on this design, prototype fabricated, it successfully passed high test.
Power couplers, used in China-ADS proton linac injector I, are required to transfer 6 kW RF power the superconducting Spoke cavities. At present, first two couplers of a coaxial design have been fabricated, which accomplished high test at IHEP. The results indicated that this qualified deliver 10 continuous travelling wave mode. This paper describes coupler's room temperature procedures and discusses original test, was terminated due serious out-gassing after some modifications. In final...
Abstract A 499.8 MHz single-cell superconducting cavity has been proposed as the active third-harmonic for High Energy Photon Source (HEPS), a 6 GeV diffraction-limited synchrotron light source currently under construction in Beijing. Two cryomodules are required to provide total of 3.5 MV rf voltage and 400 kW beam power. mechanically enhanced design, based on original KEKB-type cavity, was developed meet specifications HEPS. Three have assembled subjected horizontal tests. comprehensive...