Part 4/10:
Resonance in the Second Cavity: The electron bunches arriving at the second cavity induce an electromagnetic field that oscillates at the same frequency as the initial signal. Because the bunches are timed with the cavity's resonance, they reinforce its oscillations.
Signal Extraction: The induced electromagnetic field in the second cavity is stronger than the initial signal, allowing for the extraction of a higher amplitude signal, representing amplification of the original input.
The Role of Cavity Resonators
To understand the mechanics of a klystron, one must delve into the behavior of cavity resonators, which resemble traditional resonant circuits comprising capacitors and inductors but on a microscopic scale: