The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1982
Filed:
Mar. 24, 1980
Georges Charpak, Paris, FR;
Agence Nationale de Valorisation de la Recherche, Neuilly-sur-Seine, FR;
Abstract
The spatial distribution of mono-energetic x-rays from a point source, is determined by a device which comprises a gas filled enclosure having a flat radiation entrance window. Flat electrodes establish an electrical field of such amplitude that there occurs conversion of said radiation into photo electrons and avalanche electron multiplication resulting in delivery of a burst or pulse of electrons per conversion whose height is an increasing function of the travel path of the electrons avalanche from the location of the conversion event to the planar outlet electrode. A detector located in a second portion of the enclosure receives the pulse of electrons and determines the coordinates and the pulse height of the pulse.