Generation of Ultrashort Pulses in XUV and X-ray FELs via an Excessive Reverse Undulator Taper
The pulse duration in short-pulse schemes for Self-Amplified Spontaneous Emission Free Electron Lasers (SASE FELs) is limited by the FEL coherence time.A recently proposed concept allows to overcome the coherence time barrier and to obtain much shorter pulses.When the lasing part of an electron bunch is much Ankle Socks shorter than the coherence t