Global Patent Index - EP 0968519 A2

EP 0968519 A2 20000105 - IONIZATION CHAMBER FOR RADIOMETRIC MEASURING INSTRUMENTS

Title (en)

IONIZATION CHAMBER FOR RADIOMETRIC MEASURING INSTRUMENTS

Title (de)

IONISATIONSKAMMER FÜR RADIOMETRISCHE MESSEINRICHTUNGEN

Title (fr)

CHAMBRE D'IONISATION POUR INSTRUMENTS DE MESURE RADIOMETRIQUES

Publication

EP 0968519 A2 20000105 (DE)

Application

EP 98925415 A 19980320

Priority

  • DE 9800818 W 19980320
  • DE 19712032 A 19970321
  • DE 19731608 A 19970723

Abstract (en)

[origin: WO9843116A2] The invention relates to an ionization chamber for radiometric measuring instruments, specially for transversal surface measurement systems, comprising a housing with filling gas therein, having at least one radiation input window and a plurality of collector electrodes in the housing with insulated, outward leading electrical connections, whereby an electrical potential difference (voltage) exists between the housing and the collector electrodes. The inventive device enables an ionization chamber for radiometric measuring instruments to be created, specially for transversal surface measurement systems. Said chamber is sufficiently sensitive and meets the usual high requirements of ionization chambers with regard to vacuum-tightness, base current and temperature dependency. This is achieved by subdividing a plurality of adjacent and mutually defining sections (2) inside the housing (3) with the respective collector electrodes (6), by connecting the collector electrodes (6) to electrical connections (14) which are guided outwards through the insulator (13; 17) of a gas-tight multiple through-passage, and by providing the insulator (13; 17) with an electrically conductive area encompassing all the electrical connections (14). Said area is electrically insulated from the housing (3) and from the connections (14). However, it lies within the electrode potential when in a state devoid of electricity.

IPC 1-7

H01J 47/02

IPC 8 full level

H01J 47/02 (2006.01)

CPC (source: EP)

H01J 47/02 (2013.01)

Citation (search report)

See references of WO 9843116A3

Designated contracting state (EPC)

DE FI FR GB IT SE

DOCDB simple family (publication)

WO 9843116 A2 19981001; WO 9843116 A3 19981217; DE 59808464 D1 20030626; EP 0968519 A2 20000105; EP 0968519 B1 20030521; JP 2002507311 A 20020305; US 6278121 B1 20010821

DOCDB simple family (application)

DE 9800818 W 19980320; DE 59808464 T 19980320; EP 98925415 A 19980320; JP 54468298 A 19980320; US 38155599 A 19991206