%0 Book Section
%A Geloni, Gianluca
%Y Jaeschke, Eberhard
%Y Khan, Shaukat
%Y Schneider, Jochen R.
%Y Hastings, Jerome B.
%T Self-Seeded Free-Electron Lasers
%C Cham
%I Springer International Publishing
%M PUBDB-2016-00003
%P 1-28
%D 2015
%Z (c) Springer International Publishing Switzerland
%< Synchrotron Light Sources and Free-Electron Lasers
%X Self-seeding is an active filtering method for Free-Electron Lasers (FELs) enabling the production of nearly Fourier-limited pulses in the X-ray frequency range where external seeding is not available. Schematically, it is composed by three parts: a Self-Amplified Spontaneous Emission (SASE) FEL working in the linear regime, a monochromator, and an FEL amplifier. Active filtering is achieved by letting the FEL pulse produced in the SASE FEL through the monochromator, while the electron beam is sent through a bypass, and its microbunching is destroyed due to dispersion. The filtered SASE pulse, serving as a seed, is recombined with the electron beam at the entrance of the FEL amplifier part. It is then amplified up to saturation and possibly beyond via post-saturation tapering. This allows for the production of high-brightness, nearly single-mode FEL pulses. The technique has been or will be implemented in a number of X-ray FEL (XFEL) facilities under operation or in the construction phase. In this chapter, we review the principle of self-seeding, its practical realizations, and related techniques.
%F PUB:(DE-HGF)7
%9 Contribution to a book
%U <Go to ISI:>//WOS:00
%R 10.1007/978-3-319-04507-8_4-1
%U https://bib-pubdb1.desy.de/record/292720