Cathode for electron gun with band-shaped beams

US5955829A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Ulf Seyfert · Dresden, DE
• Olaf Roder · Dresden, DE
• Siegfried Schiller · Dresden, DE
• Siegfried Panzer · Dresden, DE
• Robert Mohs · Dresden, DE

Key dates

• Filing date: Sep 22, 1997
• Grant date: Sep 21, 1999
• Expiry date: Sep 22, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J37/065
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Electron gun with band-shaped beams that includes a vacuum chamber extend in a longitudinal direction, a beam window running in the longitudinal direction along the vacuum chamber, and a cathode control-electrode system positioned within the vacuum chamber in the longitudinal direction. The cathode control-electrode system includes at least one substantially straight cathode positioned substantially parallel to a longitudinal axis of the cathode control-electrode system and the at least one substantially straight cathode has bulges formed at defined distances. The bulges are shaped to produce a substantially homogeneous current density distribution along the at least one substantially straight cathode and support units are located in the cathode control-electrode system to correspond with the bulges. The bulges are removably couplable to the support units.