Mufit Tecimer氏(ハワイ大学、THz-FELグループ）
Title:
Compact ERL-FEL/Pulse Stacker Cavity configurations: new high rep rate, high intensity driver sources for High Field Applications ?
Abstract:
The success of superconducting energy recovery linac driven FEL programs have stimulated the development of high average current ERL systems around the world. They will enable high power, high repetition rate FEL sources. In my talk, I'll outline a study that takes advantage of the high power deposited in the beam by elaborating on FEL schemes with exceptionally high extraction efficiency*. The objective of the study is to draw on the potential of the ERL based FEL devices to produce multi-mJ level, ultra-short ( ?10 cycles) pulses tunable within the entire IR region (and beyond) with at least several tens of MHz repetition rates. The latter would be a major step in overcoming the performance limitations of the current ultra-short laser technology in the high-field applications, a domain that is being dominated by conventional NIR/MIR sources.
The implications of employing a 100-200 MeV range ERL based IR-FEL, alone or in combination with high finesse enhancement cavities, as a driver for up-frequency conversion processes in the x-ray region will be discussed. A brief outlook will be given that extends for another (seemingly far-fetched) major high-field application; the laser driven plasma-based electron accelerators.
Results describing the beam dynamics, the interaction mechanism that underlies the proposed ERL-FEL's efficiency, temporal/spectral characteristics of the generated optical pulses as well as technological challenges in realizing the scheme will be highlighted.
*M. Tecimer, PRST-AB 15, 020703 (2012).
