Yongbin Leng
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View article: Technique for Extracting Initial Parameters of Longitudinal Phase Space of Freshly Injected Bunches in Storage Rings, and Its Applications
Technique for Extracting Initial Parameters of Longitudinal Phase Space of Freshly Injected Bunches in Storage Rings, and Its Applications Open
This paper presents a technique for extracting the initial parameters of the longitudinal phase space of freshly injected bunches in an electron storage ring. This technique combines simulation of single-bunch longitudinal phase space evol…
View article: To develop online platform and determine its effectiveness in ENHANCING DIABetes knowledge among diabetes patients in primary CARE clinic (Enhancing-Diab-Care Study): Study protocol
To develop online platform and determine its effectiveness in ENHANCING DIABetes knowledge among diabetes patients in primary CARE clinic (Enhancing-Diab-Care Study): Study protocol Open
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 knowledge and empowe…
View article: A novel approach to beam size measurement at SSRF
A novel approach to beam size measurement at SSRF Open
The development of new-generation advanced synchrotron radiation facilities with ultra-low emittance and ultra-high beam stability demands more precise measurements of beam size. To address this, the Shanghai Synchrotron Radiation Facility…
View article: Ultra-Broadband Mirrors for Ultrafast and Ultra-Intense Laser Sciences
Ultra-Broadband Mirrors for Ultrafast and Ultra-Intense Laser Sciences Open
Ultra-broadband near-zero-dispersion mirrors (UbZdMs) are the essential component for pulse reflection and beam transport in ultra-intense ultrafast lasers. By combining and optimizing the metal-dielectric hybrid structure, the TM-polariza…
View article: Ferroptosis boosting system based on a sonodynamic therapy cascade-augmented strategy for triple-negative breast cancer therapy
Ferroptosis boosting system based on a sonodynamic therapy cascade-augmented strategy for triple-negative breast cancer therapy Open
One of the novel forms of programmed cell death, ferroptosis, has recently emerged as a hopeful treatment strategy for triple-negative breast cancer (TNBC). However, insufficient levels of intracellular reactive oxygen species (ROS) and hi…
View article: Construction of an interactive humanistic nursing model in emergency rescue of epidemic outbreaks
Construction of an interactive humanistic nursing model in emergency rescue of epidemic outbreaks Open
Objective: To explore the clinical efficacy of the interactive humanistic nursing model in emergency rescue of epidemic outbreaks. Methods: This was a retrospective study. A total of 200 patients with novel coronavirus pneumonia (NCP) admi…
View article: <i>In situ</i> beam trajectory tilt measurement based on single cavity beam position monitor
<i>In situ</i> beam trajectory tilt measurement based on single cavity beam position monitor Open
In recent decades, high-gain free-electron lasers (FELs) based on linear accelerators has been successfully developed around the world. Advanced beam diagnostics and feedback technology is one of the key factors to further improve the perf…
View article: Experimental verification and analysis of the beam loading effect based on precise bunch-by-bunch 3D position measurement
Experimental verification and analysis of the beam loading effect based on precise bunch-by-bunch 3D position measurement Open
The beam loading effect is one of the main bottlenecks in further improving the performance of synchrotron radiation light sources. Although theoretical analysis and numerical simulation of the beam loading effect have been very well perfo…
View article: The SXFEL Upgrade: From Test Facility to User Facility
The SXFEL Upgrade: From Test Facility to User Facility Open
The Shanghai soft X-ray Free-Electron Laser facility (SXFEL), which is the first X-ray FEL facility in China, is being constructed in two phases: the test facility (SXFEL-TF) and the user facility (SXFEL-UF). The test facility was initiate…
View article: HOTCAP: a new software package for high-speed oscilloscope-based three-dimensional bunch charge and position measurement
HOTCAP: a new software package for high-speed oscilloscope-based three-dimensional bunch charge and position measurement Open
A software package to be used in high-speed oscilloscope-based three-dimensional bunch-by-bunch charge and position measurement is presented. The software package takes the pick-up electrode signal waveform recorded by the high-speed oscil…
View article: New noninvasive measurement method of optics parameters in a storage ring using bunch-by-bunch 3D beam position measurement data
New noninvasive measurement method of optics parameters in a storage ring using bunch-by-bunch 3D beam position measurement data Open
In order to improve machine performance, the optics parameters of the storage ring need to be measured accurately. The commonly used accelerator optics parameters, including momentum compaction factor and dispersion function, are key param…
View article: Bunch-by-bunch three-dimensional position and charge measurement in a storage ring
Bunch-by-bunch three-dimensional position and charge measurement in a storage ring Open
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 and charge measurement system has been developed at the Shanghai Synchrotron Radi…
View article: Self-Amplification of Coherent Energy Modulation in Seeded Free-Electron Lasers
Self-Amplification of Coherent Energy Modulation in Seeded Free-Electron Lasers Open
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 of an …
View article: Bunch Arrival Time Measurement System Test for SHINE
Bunch Arrival Time Measurement System Test for SHINE Open
To achieve high-precision synchronization between electron bunches and seeded lasers, a femto-second resolution bunch arrival time measurement system (BAM) is required at SHINE (Shanghai High repetition rate XFEL aNd Extreme light facility…
View article: Development of the Prototype of the Cavity BPM System for SHINE
Development of the Prototype of the Cavity BPM System for SHINE Open
The Shanghai high repetition rate XFEL and extreme light facility (SHINE) under construction is designed as one of the most advanced FEL facilities in the world, which will produce coherent x-rays with wavelengths from 0.05 to 3 nm and max…
View article: Tests of Digital BPM Signal Processors for SHINE
Tests of Digital BPM Signal Processors for SHINE Open
Digital signal processors that can handle 1 MHz bunch rate BPM signal processing is under development for SHINE. At the same time, two general purpose processor prototypes for all BPM signal sampling and processing have been developed. One…
View article: Research on the Optimal Amplitude Extraction Algorithm for Cavity BPM
Research on the Optimal Amplitude Extraction Algorithm for Cavity BPM Open
The wake field of different modes of cavity BPM carries different bunch information, the amplitude and phase of the signals of different modes can be extracted through the signal processing method to obtain the characteristic parameters of…
View article: Research on Resolution of Orbit Based on Clustering Analysis and BP Neural Network in SSRF
Research on Resolution of Orbit Based on Clustering Analysis and BP Neural Network in SSRF Open
Keeping the beam current’s normal motion is an important mission for Shanghai Synchrotron Radiation Facility (SSRF). So the Orbit (rms)x/y is an main parameter for SSRF’s running. However, the orbital resolution has been constrained by the…
View article: Research on Resolution Evaluation of Stripline BPM at SXFEL-UF
Research on Resolution Evaluation of Stripline BPM at SXFEL-UF Open
48 stripline BPMs are installed in the injection section and linear acceleration section of Shanghai X-ray Free Electron Laser (SXFEL) for electron beam position measurement. These two sections require resolution of 20 µm@100pC. Resolution…
View article: Prototype of the Bunch Arrival Time Monitor for SHINE
Prototype of the Bunch Arrival Time Monitor for SHINE Open
Bunch arrival time monitor (BAM) is an important tool to investigate the temporal characteristic of electron bunch in free electron lasers (FEL). Since the timing jitter of electron bunch will affect the FEL’s stability and the resolution …
View article: Status of Digital BPM Signal Processor for SHINE
Status of Digital BPM Signal Processor for SHINE Open
Digital signal processors that can handle 1MHz bunch rate BPM signal processing are under development for SHINE. Two different processors have been developed at the same time, including an intermediate frequency signal processor with a sam…
View article: The First Beam Experiment Result of the Protype of Wire Scanner for SHINE
The First Beam Experiment Result of the Protype of Wire Scanner for SHINE Open
As a kind of quasi-non-destructive beam size monitoring, SHINE will employ dozens of wire scanners. The preliminary study is confronted with motion control difficulty. To reduce the ultrahigh coordinate about wire movement with beam loss d…
View article: Development of an X-Band CBPM Prototype for SHINE
Development of an X-Band CBPM Prototype for SHINE Open
SHINE is a newly proposed high-repetition-rate X-ray FEL facility and will be used to generate brilliant X-rays between 0.4 and 0.25 keV. To guarantee the high performance of FEL light pulses, it put a strict requirement on the monitoring …
View article: Machine learning based image processing technology application in bunch longitudinal phase information extraction
Machine learning based image processing technology application in bunch longitudinal phase information extraction Open
We report on the application of machine learning (ML) methods to extract longitudinal phase information such as parameters of the synchrotron damping oscillation. Parameters of the synchrotron damping oscillation are important for the eval…
View article: Prototype Design of Bunch Arrival Time Measurement System Based on Cavity Monitor for SHINE
Prototype Design of Bunch Arrival Time Measurement System Based on Cavity Monitor for SHINE Open
The Shanghai high repetition rate XFEL and extreme light facility (SHINE) is planned to be built into one of the most efficient and advanced free-electron laser user facilities over the world to provide a unique tool for kinds of cutting-e…
View article: Development of Web-based Parameter Management System for SHINE
Development of Web-based Parameter Management System for SHINE Open
A web-based parameter management system for Shanghai High repetition rate XFEL aNd Extreme light facility (SHINE) is developed for accelerator physicists and researchers to communicate with each other and track the modified history. The sy…
View article: Coherent extreme ultraviolet free-electron laser with echo-enabled harmonic generation
Coherent extreme ultraviolet free-electron laser with echo-enabled harmonic generation Open
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 of the EEHG free-elect…
View article: Bunch Length Measurement Using Multi-Frequency Harmonic Analysis Method at SSRF
Bunch Length Measurement Using Multi-Frequency Harmonic Analysis Method at SSRF Open
Harmonics method in the frequency domain is an effective and inexpensive bunch length measurement method, which was implemented at the Shanghai Synchrotron Radiation Facility (SSRF). A multi-frequency bunch-bybunch length measurement syste…
View article: Deep Learning Applied for Multi-Slit Imaging Based Beam Size Monitor
Deep Learning Applied for Multi-Slit Imaging Based Beam Size Monitor Open
In order to satisfy the requirement of high speed measurement and improve the accuracy of BSM (beam size monitor), multi-slit imaging based BSM has been proposed by SSRF at 2017. However, it is very difficult to deconvolve the image and fi…
View article: Electro-Optic Modulator Based Beam Arrival Time Monitor for SXFEL
Electro-Optic Modulator Based Beam Arrival Time Monitor for SXFEL Open
Beam arrival time monitor (BAM) is an important tool to investigate the temporal characteristic of elec-tron bunch in free electron laser (FEL) like Shanghai soft X-ray Free Electron Laser (SXFEL). Since the timing jitter of electron bunch…