| Popis: |
We present the design and the experimental test results of a high power, metamaterial (MTM) based backward wave oscillator (BWO). The electron beam propagates through a waveguide loaded with two MTM plates. The experiment is similar to our previous design [1] except that one MTM plate is built as the reverse of the second plate. The fundamental mode has a negative group velocity and the design frequency is 2.4 GHz. CST PIC simulations predict megawatt level output power with a helical beam trajectory, indicating the Cherenkov-cyclotron synchronism condition $\omega = \quad k_{z}\,v_{z}\,- \Omega _{c}\,/ \gamma$. |
