Patent · US Active

Electron optical apparatus, X-ray emitting device and method of producing an electron beam

US7839979B2 · kind B2 · utility

35Cited by

6References

15Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Stefan Hauttmann · Kürten, DE
Wolfram Maring · Hamburg, DE
Steffen Holzapfel · Hamburg, DE

Key dates

Filing date	Oct 8, 2007
Grant date	Nov 23, 2010
Priority date	—
Expiry date	Oct 8, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH01J35/153
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

It is described an electron optical arrangement, a X-ray emitting device and a method of creating an electron beam. An electron optical apparatus (1) comprises the following components along an optical axis (25): a cathode with an emitter (3) having a substantially planar surface (9) for emitting electrons; an anode (11) for accelerating the emitted electrons in a direction essentially along the optical axis (25); a first magnetic quadrupole lens (19) for deflecting the accelerated electrons and having a first yoke (41); a second magnetic quadrupole lens (21) for further deflecting the accelerated electrons and having a second yoke (51); and a magnetic dipole lens (23) for further deflecting the accelerated electrons.

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