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Theoretical Studies on Novel High-Gain Seeded FEL Schemes

  • Chao FengEmail author
Chapter
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Part of the Springer Theses book series (Springer Theses)

Abstract

In this chapter, the technique of manipulating of electron beam phase space at optical wavelength has been systematically studied. After that, several novel high-gain FEL schemes, including the pre-density modulation (PDM), echo-enabled staged harmonic generation (EESHG), phase-merging enhanced harmonic generation (PEHG), mode-locking of seeded FEL, chirped pulse amplification of coherent harmonic generation (CPA-CHG), have been proposed and studied to improve the performance of SASE and HGHG. Theoretical and simulation studies for seeded FEL schemes with ultra-short seed laser pulses are presented to show the phase error multiplication process in harmonic generation schemes. We found that the slippage effect in the modulator can be used to slow down this multiplication process, which may aid in the production of transform-limited short-wavelength pulses for seeded FELs.

Keywords

PDM EESHG PEHG Mode-locking CPA-CHG Phase error multiplication Slippage effect 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Shanghai Institute of Applied PhysicsShanghaiChina

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