Planar electron beams in a wiggler magnet array

Transport of high current (～kA range with particle energy ～1 MeV) planar electron beams is a topic of increasing interest for applications in high-power (1–10 GW) and high-frequency (10–20 GHz) microwave devices such as backward wave oscillator (BWO), klystrons, gyro-BWOs, etc. In this paper, we give a simulated result for transport of electron beams with velocity $V_{rm b} = 5.23 times 10^{8}$  cm s^???1, relativistic factor γ?=?1.16, and beam voltage = ～80 kV in notched wiggler magnet array. The calculation includes self-consistent effects of beam-generated fields. Our results show that the notched wiggler configuration with ～6.97 kG magnetic field strength can provide vertical and horizontal confinements for a sheet electron beam with 0.3 cm thickness and 2 cm width. The feasibility calculation addresses to a system expected to drive for 13–20 GHz BWO with rippled waveguide parameters as width w?=?3.0 cm, thickness t?=?1.0 cm, corrugation depth h?=?0.225 cm, and spatial periodicity d?=?1.67 cm.