In specific electron tubes like X-ray tubes, the anticathode is the heavy metal target placed opposite the cathode. When high-velocity electrons from the cathode bombard it, the sudden deceleration produces Bremsstrahlung radiation or characteristic X-rays. It must be designed to dissipate massive amounts of heat generated during this collision.
Heard on the job
The cooling block behind the anticathode failed, causing the target to melt under the beam current.
Related terms
Cathode ray tube
A vacuum tube containing one or more electron guns and a phosphorescent screen used to display images.
Vacuum tube
An evacuated glass or metal envelope containing electrodes used to control electron flow.
Cold cathode
A vacuum tube electrode that emits electrons without relying on a dedicated heating filament.