Published June 5, 1987 | Version v1
Patent Metadata-only

Electron gun operating by secondary emission under ionic bombardment

Creators

Description

The electron gun includes an ionization chamber adjacent to the high voltage chamber. In the common wall to the two chambers there is an extraction grid. Facing it, the ionization chamber includes a window, with a same form as the extraction grid, and with a thin metal film. High voltage chamber includes a cathode. In giving to the two grids the form of parallel homologous thin sheet, a masking effect and a focusing effect are got, which allow to increase the electron gun efficiency

Availability note (English)

Available from Institut National de la Propriete Industrielle, Paris (France).

Abstract (French)

Le canon a electrons comprend une chambre d'ionisation adjacente a une chambre de haute tension. Dans la paroi commune aux deux chambres est prevue une grille d'extraction. En regard, la chambre d'ionisation comporte une fenetre de sortie des electrons de forme homologue a celle de la grille d'extraction, et accompagnee d'une fine pellicule metallique. La chambre de haute tension comporte une cathode, portee a une haute tension negative. En donnant aux deux grilles la forme de lamelles paralleles homologues, on obtient a la fois un effet de masquage et un effet de focalisation qui permettent d'augmenter le rendement du canon a electrons

Additional details

Additional titles

Original title (French)
Canon a electrons operant par emission secondaire sous bombardement ionique

Publishing Information

Imprint Pagination
38 p.
IPC:
Int. Cl. H01j37/06.
IPC
Int. Cl. H01j37/06.
Patent number
FR patent document 2591035/A/

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
19078128
Subject category
S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BEAM OPTICS; EFFICIENCY; ELECTRIC POTENTIAL; ELECTRON GUNS; GRIDS; IONIZATION CHAMBERS; SECONDARY EMISSION
Descriptors DEC
ELECTRODES; EMISSION; MEASURING INSTRUMENTS; RADIATION DETECTORS

Optional Information

Secondary number(s)
FR patent application 8517724.