一.前言 自由電子雷射(Free Electron Laser, 常簡寫為 FEL) 是從一九七○年代末期以來急速發展的一種新型雷射裝 置。 它的發展不僅刺激了很多基本及應用物理上的研究改 進(譬如粒子加速器、 高磁性材料、 紫外光反射鏡等等), 同時也開拓了許多雷射應用也開拓了許多雷射應用的新境 界, 譬如快速化學反應及催化、 ...
下表显示了自由电子激光器的参数。 Laser wavelengths 2.48 nm to 8 mm Fractional laser bandwidth 10-3 to 10-7 Gain per pass 1 - 300 % Laser gain-medium length 1 - 25 m Pumping method High-energy electron beam Electron beam peak current 0.1 - 800 A Electron beam energy 200 kV to 1 GeV...
中文:自由电子激光;英文:free-electron laser的原理;中文:自由电子激光;英文:free-electron laser的定义;中文:自由电子激光;英文:free-electron laser是什么。基于自由电子受激辐射放大原理产生的激光。
PURPOSE:To improve energy conversion efficiency of an electron beam to an electromagnetic wave by bringing the pulse width of an electromagnetic wave pulse into coincidence with that of the electron beam by a pulse width compressor in a free electron laser, and then introducing the electromagnetic ...
Using the European XFEL free-electron laser, researchers demonstrate terawatt-scale, attosecond hard X-ray pulses. Ten pulse trains per second, each containing hundreds of pulses at megahertz repetition rates, are achieved. Such short and intense pulses at high repetition rate enable unprecedented dama...
An interview with Michele Svandrlik and Fulvio Parmigiani project director and head of science respectively at international research center Elettra Sincrotrone Trieste and University of Trieste, Italy is presented. They informs about their free-electron laser that outputs soft X-rays. They commented ...
free-electron laser noun free-elec·tron laserˈfrē-i-ˈlek-ˌträn- :a laser that can be tuned over a wide range of frequencies and that produces electromagnetic radiation by the motion of electrons moving at relativistic velocities in a magnetic field ...
The basic scheme of Free electron laser is shown in the figure below. Over one undulator period, λw, the time difference between the electron bunch and the wave must correspond to the wavelength, λo, of the spontaneously emitted light, i.e. the longitudinal 'slippage' of the electrons ...
Free-electron lasers (FELs) are classical lasers that can provide widely tunable, highly intense, ultrashort laser pulses in any part of the spectrum. We present here the basic principles and advantages of FELs, discuss the emergence of self-amplified spontaneous emission FELs as leading candidates...
A self-seeded X-ray free-electron laser (XFEL) is a promising approach to realize bright, fully coherent free-electron laser (FEL) sources in the hard X-ray domain that have been a long-standing issue with longitudinal coherence remaining challenging. At the Pohang Accelerator Laboratory XFEL,...