Patent · US Expired

X-ray tube

US6339635B1 · kind B1 · utility

134Cited by

6References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Peter Schardt · Simmerath, DE
Erich Hell · Erlangen, DE
Detlef Mattern · Erlangen, DE

Key dates

Filing date	Mar 10, 1999
Grant date	Jan 15, 2002
Priority date	—
Expiry date	Mar 10, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH01J35/305
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An x-ray tube has a vacuum housing containing a cathode arrangement that emits electrons and an anode having a target surface on which the electrons, accelerated by an electrical field and forming an electron beam strike in a focal spot, and having a quadrupole magnet system including a coil, for focusing and deflection of the electron beam. A control unit is connected to the quadrupole magnet system. The control unit is supplied with, or has stored therein various parameter sets of predetermined coil currents that can be activated, so that, dependent on the respective parameter set, the focal spot can be displaced discretely in azimuthal fashion onto particular locations of the target surface of the anode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.