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Frequency-selective loss coupling methods for TWT stabilization

Two effective selective loss coupling schemes for oscillation prevention in high power travelling-wave tubes (TWTs) have been described. Experimental TWTs are being constructed to test both of these methods and some results are expected prior to the conference. The authors believe that these basic techniques can be modified and adapted to other important applications, such as the design of the PPM focused dual mode or high peak power helix TWTs.