The FEL SASE operation, bunch compression and the beam heater

The FEL SASE operation, bunch compression and the beam heater

We discuss the conditions required for an optimal SASE FEL operation when bunch compression techniques are exploited to enhance the bunch peak current. We discuss the case of velocity bunching and magnetic bunch compression. With reference to the latter technique we provide a quantitative estimate o...

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Veröffentlicht in:Optics communications 2011-04, Vol.284 (7), p.1945-1950
Hauptverfasser: Dattoli, G., Labat, M., Migliorati, M., Ottaviani, P.L., Pagnutti, S., Sabia, E.
Format: Artikel
Sprache:eng
Schlagworte:
Beams (radiation)
Coherent synchrotron radiation
Compressing
Electron beam accelerators
Free electron lasers
Heaters
Heating equipment
Instability
Landau damping
Laser heater
Lasers
Micro-bunching instability
Optimization
Self amplified spontaneous emission
Stability
Synchrotron light
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Beschreibung
Zusammenfassung:We discuss the conditions required for an optimal SASE FEL operation when bunch compression techniques are exploited to enhance the bunch peak current. We discuss the case of velocity bunching and magnetic bunch compression. With reference to the latter technique we provide a quantitative estimate of the amount of laser heater power necessary to suppress the micro-bunching instability without creating any problem to the SASE dynamics. ► Scaling law for laser power suppressing the michro-bunching instability. ► Bunch compression and SASE FEL dynamics. ► Heater with a FEL oscillator.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2010.11.052