WebDec 9, 2012 · The Double Helix was published in 1968 and became a worldwide bestseller. With hindsight, the book's success is scarcely surprising. Watson's story, characterised by scientific opportunism, ... WebDec 15, 2024 · TWT ; double-cavity klystron; reflex klystron ; magnetron; Answer: reflex klystron. 7. The main advantage of TWT over a multi-cavity klystron is: greater bandwidth; …
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WebSummary. In a travelling-wave tube amplifier (TWT) a linear electron beam interacts with the longitudinal r.f. electric field of a slow-wave structure. Approximate synchronism between the electrons and the wave on the structure is maintained over a wide band of frequencies in low power tubes using helix slow-wave structures. WebThe double-tapered helix was introduced fifteen years ago by Thomson-CSF in satellite TWTs. It brought a substantial increase of beam efficiency without degradation of phase … WebPractical helix designs have band center interaction efficiencies which range from 10% to 25% and band edge to center efficiency variations of 50% or more. Practical bandwidths … oeufs フランス語 意味