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The double corrugated waveguide has been demonstrated to be a suitable solution for the design and fabrication of a 0.346 GHz backward wave oscillator. One of the main challenges is the coupling of the double corrugated waveguide with the flanges. Two different couplers are investigated and compared. S-Parameters for the two configurations have been simulated and it is demonstrated that both configurations...
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...
The development of collective scattering diagnostics is essential for understanding of the anomalous transport attributed to short scale length microturbulence which poses a threat to the development of nuclear fusion reactors. Signals in the sub-THz range (0.1 – 0.8 THz) with adequate power are required to probe the plasma. A joint international effort is therefore devoted to the design and realization...
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