EP 0029758 B1 19830420 - GAS IONISATION DETECTOR AND TOMODENSITOMETER USING SUCH A DETECTOR
Title (en)
GAS IONISATION DETECTOR AND TOMODENSITOMETER USING SUCH A DETECTOR
Publication
Application
Priority
FR 7928041 A 19791114
Abstract (en)
[origin: US4367409A] Ionization chamber detector making it possible to eliminate stray signals generally due to deformations of lines of force of the electrical field created between the electrodes of the ionization chamber, the deformations being located at the ends of the electrodes. The detector comprises an ionization chamber sealingly subdivided into at least two compartments by means of a dielectric material partition which is permeable to the ionizing radiation beam, the compartments being successively arranged on the path of the beam. The downstream compartment contains the measuring electrodes and the upstream compartments the guard electrodes, which are respectively coplanar and are raised to the same potentials as the measuring electrodes. The gases introduced into both compartments at the same high pressure have different atomic numbers.
IPC 1-7
IPC 8 full level
H01J 47/02 (2006.01)
CPC (source: EP US)
H01J 47/02 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0029758 A1 19810603; EP 0029758 B1 19830420; DE 3062841 D1 19830526; FR 2469797 A1 19810522; FR 2469797 B1 19811030; US 4367409 A 19830104
DOCDB simple family (application)
EP 80401481 A 19801017; DE 3062841 T 19801017; FR 7928041 A 19791114; US 20682980 A 19801114