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Free electron lasers (FELs) require electron beams of high brightness to achieve high efficiency. The shorter the FBI, wavelength, the brighter the beams need to be. Photoinjectors that utilize mode- locked drive lasers to eject electron pulses from photocathodes have been shown to produce electron beams of very high brightness for rf linear accelerators. In some cases the brightness of beams from photoinjectors has exceeded that from traditional thermionic electron sources by more than an order of magnitude.Free electron lasers (FELs) require electron beams of high brightness to achieve high efficiency. The shorter the FBI, wavelength, the brighter the beams need to be. Photoinjectors that utilize mode- locked drive lasers to eject electron pulses from photocathodes have been shown to produce electron beams of very high brightness for rf linear accelerators. In some cases the brightness of beams from photoinjectors has exceeded that from traditional thermionic electron sources by more than an order of magnitude.
© 1992 Optical Society of America
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