EP 0186558 B1 19890510 - DEVICE FOR THE IRRADIATION OF MATTER BY AN ELECTRON BEAM
Title (en)
DEVICE FOR THE IRRADIATION OF MATTER BY AN ELECTRON BEAM
Publication
Application
Priority
FR 8419153 A 19841214
Abstract (en)
[origin: US4663532A] The invention relates to an apparatus for irradiating material by an electron beam. The apparatus comprises guidance means for placing the material on the path of the beam, an electron gun provided in a tight enclosure having a shape with a symmetry or revolution with respect to an axis, an electron-emitting filament located in the axis of the enclosure, as well as a Wehnelt electrode surrounding the filament. It is provided with a first circular slot for concentrating electrons in the vicinity of the said slot and an electron accelerating electrode surrounding the Wehnelt electrode and having a second circular slot facing the first slot. The enclosure comprises a tightly closed circular window which is transparent to the electrons and which faces the two slots.
IPC 1-7
IPC 8 full level
G21K 5/04 (2006.01); H01J 33/00 (2006.01)
CPC (source: EP US)
G21K 5/04 (2013.01 - EP US); H01J 33/00 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0186558 A1 19860702; EP 0186558 B1 19890510; CA 1236225 A 19880503; DE 3570153 D1 19890615; FR 2574978 A1 19860620; FR 2574978 B1 19870116; US 4663532 A 19870505
DOCDB simple family (application)
EP 85402371 A 19851202; CA 497476 A 19851212; DE 3570153 T 19851202; FR 8419153 A 19841214; US 80397585 A 19851203