A5006356056- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Engineering Applied Research
- Particle Detector Development and Performance
- Advancements in Photolithography Techniques
- Superconducting Materials and Applications
- Optical Systems and Laser Technology
- Gyrotron and Vacuum Electronics Research
- Distributed and Parallel Computing Systems
- Laser-Plasma Interactions and Diagnostics
- Magnetic confinement fusion research
- Advanced Data Storage Technologies
- Laser Design and Applications
- Photocathodes and Microchannel Plates
- Image Processing Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Real-time simulation and control systems
- Metallurgical Processes and Thermodynamics
- Sensor Technology and Measurement Systems
- Medical Imaging Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Crystallography and Radiation Phenomena
- Astronomical Observations and Instrumentation
- Advanced Optical Sensing Technologies
Southwest University of Science and Technology
2025
Chinese Academy of Sciences
2015-2024
Shanghai Institute of Applied Physics
2015-2024
University of Science and Technology of China
2022-2024
Hebei North University
2024
Shanghai Advanced Research Institute
2019-2023
University of Chinese Academy of Sciences
2018-2022
Shanghai Synchrotron Radiation Facility
2014
The Shanghai soft X-ray Free-Electron Laser facility (SXFEL) is being developed in two steps; the SXFEL test (SXFEL-TF), and user (SXFEL-UF). SXFEL-TF a critical development step towards construction FEL China, under commissioning at Synchrotron Radiation Facility (SSRF) campus. going to generate 8.8 nm radiation using an 840 MeV electron linac passing through two-stage cascaded HGHG-HGHG or EEHG-HGHG (high-gain harmonic generation, echo-enabled generation) scheme. of started end 2014. Its...
Free-electron lasers (FELs) are fourth-generation light sources that deliver extremely high intensity, ultrashort pulses over a broad wavelength range from far-infrared to hard x ray. FELs based on the self-amplified spontaneous emission principle have been successfully operated with ultrahigh brightness and wavelengths tuning good transverse coherence but poor temporal coherence. In contrast, laser-seeded provided full at selected central wavelengths, usually harmonics of laser seeds,...
Following the discovery of Higgs boson at LHC, new large colliders are being studied by international high-energy community to explore physics in detail and beyond Standard Model. In China, a two-stage circular collider project CEPC-SPPC is proposed, with first stage CEPC (Circular Electron Positron Collier, so-called factory) focused on physics, second SPPC (Super Proton-Proton Collider) This paper discusses this stage.
The echo-enabled harmonic generation (EEHG) scheme holds promising prospects for efficiently generating intense coherent radiation at very high harmonics of a conventional ultraviolet seed laser. We report the lasing EEHG free-electron laser (FEL) an extreme (EUV) wavelength with seeded FEL facility, Shanghai soft x-ray FEL. For first time, we have benchmarked basic theory by measuring bunching factor distributions over one octave down to EUV region. Our results demonstrated key advantages...
The spectroscopic techniques for time-resolved fine analysis of matter require coherent X-ray radiation with femtosecond duration and high average brightness. Seeded free-electron lasers (FELs), which use the frequency up-conversion an external seed laser to improve temporal coherence, are ideal providing fully soft pulses. However, it is difficult operate seeded FELs at a repetition rate due limitations present state-of-the-art systems. Here, we report novel self-modulation method enhancing...
The Shanghai Soft X-ray Free-Electron Laser facility (SXFEL) is a single-pass FEL designed to cover the photon spectrum from 10 nm 2nm based on self-amplified spontaneous emission (SASE...
The Shanghai soft X-ray Free-Electron Laser facility (SXFEL), which is the first FEL in China, being constructed two phases: test (SXFEL-TF) and user (SXFEL-UF). was initiated 2006 funded 2014. commissioning of finished 2020. 2016 to upgrade accelerator energy build undulator lines with five experimental end-stations. output photon will cover whole water window range. This paper presents an overview SXFEL facility, including considerations upgrade, layout design, construction status,...
The low desulfurization efficiency notably restricts the wide application of dry technology, although it is characterized by its cost-effectiveness and simple processes in domain. Consequently, development high-performance desulfurizers has become an increasingly pressing task to increase efficiency. In this study, we strived improve performance calcium-based sorbents using a steam jet mill process quicklime then evaluate capacity. According results, under influence different rotational...
Diabetes Mellitus (DM)- Type 2 is increasingly prevalent in today’s population. DM remains poorly controlled due to insufficient knowledge and understanding of this disease. Maintaining good diabetic self-care requires empowerment. The COVID-19 pandemic had caused a shift some public attention from non-communicable communicable diseases, leading patients becoming ignorant their status. Therefore, we aim develop an online education video platform that enables enhance about 2. In blocked...
We report on the application of machine learning (ML) methods to extract longitudinal phase information such as parameters synchrotron damping oscillation. Parameters oscillation are important for evaluation status and bunch stability. It is concern these with high-speed high-precision. The previous methods, multiparameter nonlinear fitting table look-up, slower easily fall into local optimal solutions. Our approach based ML-image processing consists training a virtual diagnostic predict...
Bunch-by-bunch beam parameters monitor is a very useful tool for accelerator operation and optimization. An in situ bunch-by-bunch three-dimensional position charge measurement system has been developed at the Shanghai Synchrotron Radiation Facility. Signals from monitors carry almost full information, broadband digital receiver can retain most information. Therefore, four-channel wideband oscilloscope employed to capture signals all electrodes of monitor. Correlation coefficient-based...
Wakefields and beam instabilities are important issues for a storage ring described by various theoretical formalisms. Direct measurements of the motion related to different dynamical mechanisms useful input accelerator optimization. This paper reports on an experimental method based simplified wakefield model, where bunch-by-bunch position information were monitored during transient injection process at Shanghai Synchrotron Radiation Facility. Processing data means principal component...
The measurement of the beam orbit plays a very important role in particle accelerators. button-type position monitor (BPM) was designed for Shanghai Synchrotron Radiation Facility to reduce impedances and guarantee high resolution measurement. Position resolution, impedance, higher-order mode, impedance matching have been studied during design based on physical parameters storage ring at Facility. Meanwhile, an analytic formula BPM broadband derived resistor-capacitor equivalent circuit....
The injection performance of the storage ring is one most important factors to consider at a synchrotron radiation facility, especially in top-up mode. To evaluate Shanghai Synchrotron Radiation Facility, we have built bunch-by-bunch position measuring system based on an oscilloscope Input/Output Controller. Accurate assessment energy mismatching, distribution residual oscillation, and angle error kickers can be achieved by this system.