Device for generation of x-ray radiation with a cold electron source
AssigneeSiemens Aktiengesellschaft
InventorsEckhard Hempel, Detlef Mattern, Stefan Popescu
Life of this patent
Estimating the term…
Abstract
A device for generation of x-ray radiation has one or more cold electron sources as a cathode and at least one x-ray target as an anode that are arranged in an evacuable housing. Upon application of an electrical voltage between cathode and anode, electrons emitted from the electron source are accelerated in an electron beam onto the x-ray target. A device for reduction of the proportion of positive ions in the region of the electron source is arranged between the electron source and the x-ray target in the housing. The device exhibits a long lifespan with good focusing capability and fast modulation capability of the electron beam.
Claims13
A device for generating x-ray radiation, comprising:
- an evacuable housing;
- at least one cold electron source forming a cathode in said housing;
- at least one x-ray target forming an anode in said housing;
- an arrangement for applying an electrical voltage between said cathode and said anode to cause electrons to be emitted from said at least one electron source and accelerated in an electron beam onto said at least one x-ray target;
- and
- a device in said housing that reduces a proportion of positive ions that interact with said cold electron source, disposed between the electron source and the x-ray target.
Dependencies are inferred from the claim text.