29 citations · 52 across the 18 of their papers we have counts for
18 papers
High duty cycle EUV radiation source based on inverse Compton scattering
Ruixuan Huang, Qika Jia
Inverse Compton scattering (ICS) can obtain quasi-monochromatic and directional EUV radiation via a MeV-scale energy electron beam and a micron-scale wavelength laser beam, which e…
Smith-Purcell radiation from a charge moving above a finite-length grating with rectangular profiles
Weiwei Li, Weihao Liu, Zhigang He +2
Smith-Purcell radiation is generated by a charged particle beam passing close to the surface of a diffraction grating which has a strong dependency of the emitted radiation intensi…
Numerical Method for Free Electron Laser using an Overmoded Rectangular Waveguide
Weiwei Li, Heting Li, Zhigang He +3
Numerical simulation codes are basic tools for designing Free Electron Lasers (FELs). This paper describes a numerical method for the time-dependent, three-dimensional simulation o…
Generation of coherent two-color pulses at the two adjacent harmonics in a seeded free-electron laser
Zhouyu Zhao, Heting Li, Qika Jia
The growing requirements of pump-probe techniques and nonlinear optics experiments greatly promote the studies of two-color free-electron lasers (FELs). We propose a new method to…
The effect of cavity length detuning on the output characteristics for the middle infrared FEL oscillator of FELiChEM
Zhou-Yu Zhao, He-Ting Li, Qi-Ka Jia
FELiChEM is an infrared free electron laser (FEL) facility under construction, which consists of two oscillators generating middle-infrared and far-infrared laser covering the spec…
Design of FELiChEM, the first infrared free-electron laser user facility in China
He-Ting Li, Qi-Ka Jia, Shan-Cai Zhang +2
FELiChEM is a new experimental facility under construction at University of Science and Technology of China (USTC), whose core device is two free electron laser oscillators generat…
Simulation Study on the Emittance Compensation of Off-axis Emitted Beam in RF Photoinjector
Rui-Xuan Huang, Chad Mitchell, Qi-Ka Jia +2
To make full use of photocathode material and improve its quantum efficiency lifetime, it can be necessary to operate laser away from the cathode center in photoinjectors. In RF gu…
Particle acceleration by stimulated emission of radiation in cylinder waveguide
Tian Xiufang, Wu Congfeng, Jia Qika
In the particle acceleration by stimulated emission of radiation (PASER), the efficient interaction occurs when a train of micro-bunches whose periodicity being identical to the re…
Investigating of electrons bunching in a Penning trap and accelerating process for CO2 gas mixture active medium
Xiu-fang Tian, Cong-feng Wu, Qika Jia
In the presence of an active medium incorporated in a Penning trap, the moving electrons can become bunched, as they get enough energy, they escape the trap forming an optical inje…
Analytical formula of Free Electron Laser exponential gain for non-resonant electron beam
Qika Jia
The FEL gain formulas for non-resonant case are studied. For the mono-energetic and non-resonant electron beam, the exact expression of the solution of the FEL characteristic cubic…
Optimization of single-step tapering amplitude and energy detuning for high-gain FELs
Li Heting, Jia Qika
We put forward a method to optimize the step-tapering amplitude of undulator strength and initial energy detuning of electron beam with the goal of maximizing the saturation power…
An analysis on optimization of undulator in self-seeding free electron laser
Jia Qika
A simple analysis is given for optimum length of undulator in self-seeding free electron laser (FEL). The obtained relations show the correlation between the undulator length and t…
Development of A Modified Quasi-periodic Undulator for HLS
Yufeng Yang, Huihua Lu, Wan chen +3
A modified quasi periodic undulator (QPU) is developed and to be installed at Hefei Light Source (HLS).Magnet dimensions optimization is applied. High harmonics contamination is el…
Physical design of a wavelength tunable fully coherent VUV source using self-seeding free electron laser
Li He-Ting, Jia Qi-Ka
In order to meet requirements of the synchrotron radiation users, a fully coherent VUV free electron laser (FEL) has been preliminarily designed. One important goal of this design…
Velocity bunching in travelling wave accelerator with low acceleration gradient
Rui-Xuan Huang, Zhi-Gang He, Wei-Wei Li +1
We present the analytical and simulated results concerning the influences of the acceleration gradient in the velocity bunching process, which is a bunch compression scheme that us…
Compact narrow-band THz radiation source based on photocathode rf gun
Li Wei-Wei, He Zhi-Gang, Jia Qi-Ka
Narrow-band THz coherent Cherenkov radiation can be driven by a subpicosecond electron bunch traveling along the axis of a hollow cylindrical dielectric-lined waveguide. We present…
Generation and measurement of sub-picosecond electron bunch in photocathode rf gun
Weiwei Li, Zhiagng He, Qika Jia
We consider a scheme to generate sub-picosecond electron bunch in the photocathode rf gun by improving the acceleration gradient in the gun, suitably tuning the bunch charge, the l…
Harmonics suppression effect of the quasi-periodic undulator in SASE free-electron-laser
Ai-Lin Wu, Qi-Ka Jia, He-Ting Li
In this paper, the harmonics suppression effect of QPUs in SASE FEL is investigated. The numerical results show that the harmonics power is reduced by using QPUs, but the fundament…