Friday, December 5, 2014
Abstract-Terahertz Free-Electron Laser injector linac
The RF properties of an accelerating structure, and the pulse structure and per bunch in the electron propagating through it are important parameters that determine the of loading in the structure. The injector of the Compact Ultrafast Terahertz (CUTE-FEL) has been operated with two different pulse structures during initial commissioning experiments and the effect of loading on the parameters has been studied analytically for these two pulse structures. This paper discusses the analytical study of loading in a Standing Wave, Plane Wave Transformer employed in the CUTE-FEL setup, and a possible technique for its compensation for the electron parameters of the CUTE-FEL. A parametric study has been performed to study loading for different and to optimize injection time of the electron to compensate loading. Results from the parametric study have also been used to explain previously observed results from acceleration experiments in the CUTE-FEL setup.