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:
Jul. 16, 1991
Filed:
Oct. 18, 1989
Georges Charpak, 75020 Paris, FR;
Other;
Abstract
A device according to the invention includes: a gas detector, comprising at least one chamber (2) and containing a noble gas and a gas or vapor that emits photons between two parallel electrodes (3a, 3b) between which a continuous high voltage (HT) is applied, whereby a first electrode (3a) is intended for receiving, against its external face, the surface of the radioactive body (5,6) to be observed; a brilliance amplifier (13) arranged for receiving the photons emitted by the excited atoms which are produced in the vicinity of a second electrode (3b) by the electron avalanche ascribable to the electrical field between the first and second electrodes; a camera (12) arranged behind the brilliance amplifier; and computing means (15) capable of computing, from the output signal of the camera, the entrance points (9) in said gas detector, at the first electrode, of the electrons emerging from said surface of the radioactive body.