High power RF radiation at W-band based on wakefield excited by intense electron beam

We report the experimental design and initial experimental results on high power RF generation at W-band based on coherent wakefield from the metallic periodic structure of 91 GHz, excited by intense electron beam at the Argonne Wakefield Accelerator (AWA) facility. The recently output RF power is 0.7 MW, with 67 MeV, 1.4 nano-column (nC) single electron beam go through the 12cm structure. The RF pulse is 3.4 nano-second (ns). We measure the energy loss of electron beam in the experiment. Next run is to increase the output RF power with higher charge in the driven beam and to excite higher gradient of wakefield with electron bunch train.