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The free-electron laser FELIX Radboud University, Netherlands. A free-electron laser ( FEL ) is a fourth generation light source producing extremely brilliant and short pulses of radiation. An FEL functions much as a laser but employs relativistic electrons as a gain medium instead of using stimulated emission from atomic or molecular excitations.
Photoinjectors serve as the main electron source for single-pass synchrotron light sources, such as free-electron lasers [3] and for ultrafast electron diffraction setups. [4] The first RF photoinjector was developed in 1985 at Los Alamos National Laboratory and used as the source for a free-electron-laser experiment.
Download as PDF; Printable version; ... Pages in category "Free-electron lasers" The following 12 pages are in this category, out of 12 total. ... Free-electron laser ...
where is the electron charge, is the linearly polarised electric field amplitude, is the laser carrier frequency and is the electron mass. In terms of the laser intensity I {\displaystyle I} , using I = c ϵ 0 E 2 / 2 {\displaystyle I=c\epsilon _{0}E^{2}/2} , it reads less simply:
A free-electron laser depends upon a beam of tightly bunched electrons. Short bunches of electrons are produced by a photoinjector, but they quickly elongate, because electrons have negative charge and little mass, causing the bunch to expand. As the bunch is accelerated, the electrons gain mass and quickly approach the speed of light.
Self-amplified spontaneous emission (SASE) is a process within a free-electron laser (FEL) by which a laser beam is created from a high-energy electron beam. [ 1 ] [ 2 ] The SASE process starts with an electron bunch being injected into an undulator , with a velocity close to the speed of light and a uniform density distribution within the bunch.
An infrared free electron laser (FEL), using a permanent magnet undulator on permanent loan from Thomas Jefferson National Accelerator Facility (TJNAF). An ERL transport system that transports electron bunches through the FEL and back to the linac with the correct RF phase to decelerate them and thereby to recover energy from them.
Duke Free Electron Laser Laboratory (DFELL) Duke University, Durham, North Carolina: US 0.2 - 1.2 107.46 1994 Jefferson Laboratory Free Electron Laser (Jlab) Thomas Jefferson National Accelerator Facility, Newport News, Virginia: US W. M. Keck Vanderbilt Free-electron Laser Center Vanderbilt University, Nashville, Tennessee: US