A5019621339- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Photocathodes and Microchannel Plates
- Gyrotron and Vacuum Electronics Research
- Landslides and related hazards
- Semiconductor Lasers and Optical Devices
- Rock Mechanics and Modeling
- Nuclear Physics and Applications
- Geotechnical and Geomechanical Engineering
- Photonic and Optical Devices
- Cyclopropane Reaction Mechanisms
- Ion-surface interactions and analysis
- Optical Systems and Laser Technology
- Synthesis and Catalytic Reactions
- Fusion materials and technologies
- Radiation Detection and Scintillator Technologies
- Real-time simulation and control systems
- Optical Coatings and Gratings
- Geophysical Methods and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Laser Design and Applications
- Optical properties and cooling technologies in crystalline materials
- X-ray Spectroscopy and Fluorescence Analysis
Chinese Academy of Sciences
2021-2024
Institute of High Energy Physics
2021-2024
Michigan State University
2013-2024
Jiangxi University of Science and Technology
2024
China Spallation Neutron Source
2021-2023
Shangqiu Normal University
2021
Shangqiu Institute of Technology
2021
Deutsches Elektronen-Synchrotron DESY
2019-2021
University of Science and Technology of China
2016-2019
National Synchrotron Radiation Laboratory
2016
Silver-catalyzed direct C–H functionalization of cyclic aldimines with cyclopropanols and cyclobutanols via a radical-mediated C–C bond cleavage strategy has been realized, generating the desired products in decent yields wide substrate scope.
Abstract Superconducting undulators (SCUs) are increasingly vital for synchrotron light sources and free-electron lasers in modern particle accelerators due to their ability surpass the performance limitations of traditional permanent magnet (PMUs). This paper delves into theoretical framework key technologies SCUs, substantiating findings with experimental verifications. The analysis numerical simulations SCU magnetic fields conducted based on Maxwell's equations, leading optimized field...
Abstract The Facility for Rare Isotope Beams (FRIB) began operation with 1 kW beam power scientific users in May 2022 upon completion of 8 years project construction. ramp-up to the ultimate 400 kW, planned over a 6-year period, will enable facility reach its full potential discovery isotope science and applications. In December 2023, record-high 10.4 uranium was delivered target. Technological developments accelerator improvements are being made entire key ramp-up. Major technological...
Undulators are important devices for accelerator-based light sources whose magnetic field quality determines the photon beam performance. Superconducting-type undulators have been developing rapidly in recent years around world. The insertion device group at Institute of High Energy Physics (IHEP) China started an R&D project to develop prototypes superconducting (SCUs). A half-meter-long planar SCU has produced recently. was designed based on simulation program OPERA-3D giving a period...
Taking advantage of a higher field than conventional permanent magnet undulator, superconducting undulators (SCUs) have been rapidly developed in recent years for applications at synchrotron radiation sources and free-electron lasers. The Institute High Energy Physics, Chinese Academy Sciences, has 1.5-m long planar SCU with short period 15 mm. This commissioned optimized the horizontal position. In contrast to vertical position, where undulator coils are immersed liquid helium...
The Facility for Rare Isotope Beams (FRIB) is a major nuclear physics facility research with fast, stopped, and reaccelerated beams that was successfully commissioned in May 2022. A key capability of FRIB the production an acceleration uranium beam, but this requires to work at design limits lowest charge-to-mass ratio highest power density on beam intercepting devices. This paper presents techniques overcoming significant challenges accelerating culminating demonstration 10.4 kW target,...
Abstract Superconducting undulators (SCUs) for advanced light sources are being developed rapidly to emit with higher brightness and flux. The SCU consists of two superconducting magnets a small gap, each alternating poles. is invisible when operating in Dewar or cryostat, so measuring the magnetic field narrow gap challenge development SCU. This paper presents measurement system vertical status scanning along z-axis. immersed vertically 4.2 K liquid helium powered by servo motor at room...
Superconducting undulators (SCUs) have the advantages of generating stronger magnetic field and radiation hardness compared to permanent magnet undulators. Therefore, SCUs are valuable be applied in free-electron lasers (FELs) driven by high-repetition-rate linear accelerators. The Insertion Device Group at Institute High Energy Physics (IHEP) China started an R&D project produce NbTi planar SCU prototypes with 15 mm period length. Several prototypes, including short mock-ups, a...
Central frequency is a key parameter of storage rings. This paper presents the measurement central HLS-II ring using sextupole modulation method. Firstly, basis electron briefly introduced. Then, error sources and optimized method for are discussed. The workflow self-compiled Matlab script used in also described. In end, results achieved by two methods to cross-check each other shown. measured value demonstrates that real circumference agrees well with designed value.
TESLA cavities are used at the free-electron laser in Hamburg (FLASH) to accelerate electron bunches for generating intense beams. Two specially designed couplers mounted both ends of each cavity damp higher order modes (HOMs) excited by beam these cavities. By using a specific dipole mode signal extracted from couplers, one can determine transverse position as well polarizations and center cavity. We introduce new method based on fitting correlate amplitude phase measured position. With...