(R): Repeller (Zurueckwerf) electrode
(H): Cavity
(f): Screws, in order to adjust the size of the cavity
(frequency change)
From the Katode withdrawing electrons become of the
cavity angozogon, troten however grosson the
Geschwindigkoit wogon by the holes of the cavity into
the area to the Repeller electrode. Because this is
negative, the electrons are again back-thrown. Forms an
electron cloud, which swings in the cavity back and
forth. The size of the cavity determines thereby the
oscillation duration and thus the frequency of the
Oscillators.
Another kind klystron has a mechanically adjustable
Repeller and can thereby the frequency change.
A third kind cannot be adjusted mechanically, but can
be adjusted the tubing-like transverse electromagnetic
wave by the klystron mechanically in the length.