Design formulas for short-wavelength FELs

Simple formulas for optimization of vacuum ultraviolet (VUV) and X-ray self-amplified spontaneous emission (SASE) free electron lasers (FELs) are presented. The FEL gain length and the optimal β-function are explicitly expressed in terms of the electron beam and undulator parameters. The FEL saturat...

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Bibliographic Details
Published inOptics communications Vol. 235; no. 4; pp. 415 - 420
Main Authors Saldin, E.L., Schneidmiller, E.A., Yurkov, M.V.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.05.2004
Elsevier Science
Subjects
Electromagnetism; electron and ion optics
Exact sciences and technology
Free electron laser
Free-electron lasers
Fundamental areas of phenomenology (including applications)
Gain length
Physics
Radiation by moving charges
Undulator
Undulator
Free electron laser
41.60.cr
Gain length
Spontaneous emission
Electron beams
Free electron lasers
Optimization method
Theoretical study
Quantum optics
Eigenvalues
X radiation
Extreme ultraviolet radiation
Gain
Amplified spontaneous emission
Quantum fluctuation
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Summary:Simple formulas for optimization of vacuum ultraviolet (VUV) and X-ray self-amplified spontaneous emission (SASE) free electron lasers (FELs) are presented. The FEL gain length and the optimal β-function are explicitly expressed in terms of the electron beam and undulator parameters. The FEL saturation length is estimated taking into account energy diffusion due to quantum fluctuations of the undulator radiation. Examples of the FEL optimization are given. Parameters of a SASE FEL, operating at the Compton wavelength, are suggested.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2004.02.071