Speaker
Description
FELs have made tremendous progress in the last fifty years, but the energy conversion efficiency is still in the order of 1%. The ORGAD is a hybrid S-band (2856 MHz) RF photo-cathode accelerator located at the Schlesinger Compact Accelerator Center at Ariel University, a collaborative project with Tel Aviv University. A longitudinally bunched electron beam is then injected into an undulator generating a coherent spontaneous emission, referred to as a super-radiant emission, whose energy yield is proportional to $N^2$. Here we present the design and simulations of a THz source based on the novel radiative interaction–Tapered Enhanced Super-radiance(TES), using a combined waveguided undulator structure in the THz regime (~0.5 THz). A coherent emission generated in the uniform section is used as a seed source, which interacts with the electron beam bunch in a tapered (amplitude) undulator, in the zero-slippage, realizing a significantly more powerful and efficient emission. This method avoids a complicated seed and electron pulse synchronism system. Here, this scheme is simulated starting from the Cathode according to the theoretical model, demonstrating an increased efficiency of x3.
Funding Agency
This work was supported by the Israeli Science Foundation Grant No. 1705/22
