Title:
放射線検出器
Document Type and Number:
Japanese Patent JP4264984
Kind Code:
B2
Abstract:
A radiation detector in which primary electrons are released into a gas by ionizing radiations and drifted through an electric field (E) to a collecting electrode (CE) for detection. It further includes a gas electron multiplier (10, 11, 12) formed by one or several matrices of electric field condensing areas (1i) which are distributed within a solid surface perpendicular to the electric field. Each electric field condensing area consists of a tiny hole passing through the solid surface that forms a dipole adapted to produce a local electric field amplitude enhancement proper to generate an electron avalanche from one primary electron. The gas electron multiplier operates thus as an amplifier or a preamplifier within a host radiation detector.
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Inventors:
Sauli, Fabio
Application Number:
JP52315999A
Publication Date:
May 20, 2009
Filing Date:
October 16, 1998
Export Citation:
Assignee:
European Organization for Nuclear Research
International Classes:
G01T1/18; H01J47/02; H01J29/46; H01J31/49
Domestic Patent References:
| JP9508750A |
Foreign References:
| WO1997029507A1 | ||||
| WO1997014173A1 | ||||
| WO1995035510A1 |
Other References:
R. Bouclier et al., New observations with the gas electron multiplier (GEM), Nuclear Instruments and Methods in Physics Research A, 1997年 9月 1日, 396/1,2, 50-66
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Ishibashi Masayuki
Masaaki Ogata