TY  - CHAP
AU  - Geloni, Gianluca
A3  - Jaeschke, Eberhard
A3  - Khan, Shaukat
A3  - Schneider, Jochen R.
A3  - Hastings, Jerome B.
TI  - Self-Seeded Free-Electron Lasers
CY  - Cham
PB  - Springer International Publishing
M1  - PUBDB-2016-00003
SP  - 1-28
PY  - 2015
N1  - (c) Springer International Publishing Switzerland
AB  - 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.
LB  - PUB:(DE-HGF)7
UR  - <Go to ISI:>//WOS:00
DO  - DOI:10.1007/978-3-319-04507-8_4-1
UR  - https://bib-pubdb1.desy.de/record/292720
ER  -