EP 0340126 A1 19891102 - Parallax-free gas-filled X-ray detector.
Title (en)
Parallax-free gas-filled X-ray detector.
Title (de)
Parallaxenfreier gasgefüllter Röntgenstrahlen-Detektor.
Title (fr)
Détecteur gazeux pour rayons-x sans parallaxe.
Publication
Application
Priority
FR 8806018 A 19880427
Abstract (en)
The invention relates to a gas-filled X-ray detector for analysing matter by studying the diffraction of the X-rays. <??>To minimise parallax errors without using difficult-to-manufacture spherical auxiliary electrodes, it is proposed to generate a radial field throughout the gas-filled space (40) solely with the aid of entrance electrodes (36) brought to appropriate potentials and with the aid of lateral electrodes (44) also brought individually to appropriate potentials. By modifying the potentials the centre of the spherical equipotentials can be displaced to allow parallax error-free analysis of samples (20) placed at variable distances (D) from the entrance window (32) of the detector. <IMAGE>
IPC 1-7
IPC 8 full level
G01T 1/18 (2006.01); H01J 37/244 (2006.01); H01J 47/00 (2006.01); H01J 47/06 (2006.01); H01J 49/06 (2006.01)
CPC (source: EP US)
H01J 47/008 (2013.01 - EP US); H01J 47/06 (2013.01 - EP US)
Citation (search report)
- [X] FR 2363117 A1 19780324 - ANVAR [FR]
- [X] IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol. NS-26, no. 1, février 1979, pages 146-149, IEEE; C. BOLON et al.: "A spherical drift chamber area detector for X-ray crystallography"
- [A] NUCLEAR INSTRUMENTS AND METHODS, vol. 201, no. 1, octobre 1982, pages 193-196, North-Holland Publishing Co., Amsterdam, NL; D. BADE et al.: "Development of a multiwire proportional chamber as an area sensitive detector for X-ray protein crystallography"
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0340126 A1 19891102; EP 0340126 B1 19930804; DE 68907993 D1 19930909; DE 68907993 T2 19940324; FR 2630829 A1 19891103; JP H02177243 A 19900710; US 4954710 A 19900904
DOCDB simple family (application)
EP 89420149 A 19890425; DE 68907993 T 19890425; FR 8806018 A 19880427; JP 10713289 A 19890426; US 34362789 A 19890427