Jun Zhang, C. Paoloni, R. Letizia, N. Luhmann, B. Popovic, Logan Himes, R. Barchfeld, D. Gamzina, Jinjun Feng, Li Li, P. Pan, Ye Tang, Fuhzi Zhang
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High energy beam THz backward wave oscillator based on double corrugated waveguide
A new approach to realize THz BWOs relaxing the assembly challenge is presented. An international consortium including UC Davis, Beijing Vacuum Electronics Research Institute (BVERI), and Lancaster University is involved in the design and fabrication of 0.346 THz BWOs to replace the bulky FIR laser at the plasma diagnostic at the NSTX-U fusion device. The use of a highly energetic beam permit and a wide channel, double corrugated waveguide permit to achieve about 4 W of output power at 0.346 THz.