A5077398580- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Advanced X-ray Imaging Techniques
- Advanced Data Storage Technologies
- Laser-Plasma Interactions and Diagnostics
- Magnetic confinement fusion research
- Advanced Surface Polishing Techniques
- Transition Metal Oxide Nanomaterials
- Photocathodes and Microchannel Plates
- Thin-Film Transistor Technologies
- Nuclear Physics and Applications
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Laser-Matter Interactions and Applications
- ZnO doping and properties
- Particle Detector Development and Performance
- Nuclear Materials and Properties
- Neuroscience and Neural Engineering
- Laser Design and Applications
- Analytical Chemistry and Sensors
- Distributed and Parallel Computing Systems
- Advanced Sensor and Energy Harvesting Materials
- Astronomical Observations and Instrumentation
Hainan University
2024
Chongqing University
2022-2024
South China University of Technology
2023-2024
State Key Laboratory of Luminescent Materials and Devices
2023
Chinese Academy of Sciences
2014-2022
Shanghai Advanced Research Institute
2019-2022
Shanghai Institute of Applied Physics
2011-2022
National Sun Yat-sen University
2019
Tsinghua University
2018-2019
Institute of Plasma Physics
2017
High harmonic cavities are widely used in electron storage rings to lengthen the bunch, thereby enhancing Touschek lifetime, reducing IBS effect, as well providing Landau damping. When RF phase is modulated such a dual-RF system, simulations reveal that peak current can be further reduced. This paper presents simulation results and explains underlying mechanism.
The transformer ratio, characterizing the ratio of maximum accelerating field behind drive bunch to decelerating inside bunch, is one key parameters for performance collinear wakefield accelerators. In this paper use electron bunches possessing a particular temporal profile (the double-triangular bunch) shown significantly increase beyond 2, limit symmetric bunch. generated using emittance exchange technique [P. Emma et al., Phys. Rev. ST Accel. Beams 9, 100702 (2006)]. Complete beam...
Energy-variable gamma-rays are produced in the laser Compton slant-scattering Shanghai electron gamma source (SLEGS) beamline of Light Source. An interaction chamber composed rotating optical system, shielding finger, and reference-target insertion device was developed to ensure slant scattering angular range 20–160°, producing energy 0.66–21.1 MeV with a flux 4.8 × 105–1.5 107 photons/s. SLEGS is first which systematically produces energy-variable gamma-ray beams continuously tune...
A compact damping ring with a limited circumference of about 160 m is proposed for producing kilowatt-level coherent EUV radiation. The electron bunch in the storage modulated by 257 nm wavelength seed laser help angular-dispersion-induced micro-bunching method (Feng and Zhao Sci Rep 7:4724, 2017), radiation at 13.5 an average power 2.5 kW can be achieved state-of-the-art accelerator technologies.
Generation of short-wavelength radiation by a free-electron laser using up-frequency conversion an electron bunch density modulation is currently area active research. We propose new scheme for producing the longitudinal similar to recently proposed echo-enabled harmonic generation but based on emittance exchange beam line and multislit mask. Beam analysis start-to-end simulation are presented.
Generation of coherent radiation pulses is remarkable interest in the synchrotron light source community. A novel technique has been proposed to produce temporal ref. [1]. In this scheme, an oblique incidence seed laser utilized introduce angular modulation which converted microbunching by dispersion section. paper, a specific design section given realize coupling between transverse and longitudinal directions satisfied requirements technique. Numerical simulation results demonstrate that...
In the SSRF Phase-II beamline project, a superconducting wiggler (SW) will be installed in electron storage ring. It may greatly impact on beam dynamics due to very high magnetic field. The emittance growth becomes major problem, even after correction of optics. A local achromatic lattice is studied, order combat and keep performance ring as possible. Other effects SW are also simulated optimized, including beta beating, tune shift, dynamic aperture, field error effects.
During Through Silicon Via (TSV) wafer backside thinning process, excessive surface stress will cause undue warpage or fracture of in subsequent de-bonding step, and further impair the precision following stacking packaging. Therefore, it is considerable to investigate evolution mechanism how control process. Aiming at above problem, a calculation method proposed this paper characterize TSV bonding structure, has been confirmed by micro-Raman spectroscopy; Then, based on method, change...
The multi-bunch injection has been adopt at SSRF which greatly increases the rate and reduces time compared to single bunch injection. will massively reduce beam failure during users operation prolong pulsed hardware lifetime. In this paper, scheme produce multi bunches for RF electron gun is described. refilling result orbit stability top up discussed.
The generation of fully coherent and femtosecond time-scale radiation pulses in the X-ray regime is one most common demands ring-based synchrotron light source users. In this paper, a method that utilizes recent proposed angular dispersion induced microbunching technique to convert external from high-harmonic (HHG) at shorter wavelength proposed. Numerical simulations using practical parameters diffraction-limited storage ring demonstrate pulse trains with photon energy as high 2 keV,...
Abstract In order to improve the stability of synchrotron radiation, we developed a new method machine learning-based closed orbit feedback, and piloted it in storage ring Shanghai Synchrotron Radiation Facility (SSRF). our experiments, feedback can carry out horizontal, vertical RF main frequency simultaneously. What's more, residual values variations correctors' currents before vs. after correction be almost ignored. This is expected establish system daily operation.