H01J2225/10

KLYSTRONS AND MEDICAL ELECTRON LINEAR ACCELERATORS

A klystron is provided. The klystron comprises an output cavity, an output waveguide, and a coupling port, the output waveguide is connected to a side wall of the output cavity through the coupling port, an additional cavity is provided on the side wall of the output cavity, the additional cavity is connected with the output cavity and extends from a position connected to the output cavity in a direction away from a central axis of the output cavity.