Gas Electron Multipliers for Potential Applications to Digital Radiography

Abstract:

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The gas electron multiplier (GEM), placed in the drift volume of a conventional gas detector, is a conceptually simple device for producing a large gas gain by concentrating the drift electric field over a very short distance to the point that electron avalanching occurs. This device consists of a thin insulating foil of several tens of μm in thickness, covered on each side with a thin metal layer, with tiny holes, usually 100 μm or less in diameter, and with a spacing of 100-200 μm through the entire foil, perforated by using chemical etching or high-powered laser beam technique. In this study, we have investigated its operating properties with various experimental conditions and demonstrated the possibility of using this device as a digital X-ray imaging sensor, by acquiring X-ray images based upon the scintillation lights of the GEM with a standard CCD camera.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

125-128

DOI:

10.4028/www.scientific.net/KEM.321-323.125

Citation:

H. S. Cho et al., "Gas Electron Multipliers for Potential Applications to Digital Radiography", Key Engineering Materials, Vols. 321-323, pp. 125-128, 2006

Online since:

October 2006

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Price:

$35.00

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