Electron gun to the generation of electrons grouped in the form of short pulses

摘要

the invention relates to an electron gun to produce short pulses with the predetermined folgefrequenz fo polarised electrons. $a, the gun has a katode (k), a grid (g) and an anode (a), between which the rf voltages are applied.the katode on mittelleiter (2) of a coaxial cavity (1) to the gate (g) arranged in the cavity, it concludes.the cavity (1) is at the other end of a short circuit (3) is completed, and it contains a coaxial junction (4), so that two frequencies f1 and f2, the multiple of fo, resonance, and the overlap between the two frequencies, rf - grid - katoden voltage is induced.the gate (g) includes a further coaxial cavity (10), whose mittelleiter (11) is hollow and the end of the anode, the grid gegenu00fcberliegendes forms. the cavity (10) is resonanzbetrieb at a frequency fo, a multiple of fo, with an hf anode grid voltage is induced.$a is a useful choice of frequencies fo, f1, f2, makes it possible to elektronenpakete with very short duration to obtain.