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US 2003/0164682 A1Published application
Radiation converter
AssigneeSiemens Aktiengesellschaft
InventorsManfred Fuchs, Erich Hell, Wolfgang Knupper, Detlef Mattern
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AssigneeSiemens Aktiengesellschaft
InventorsManfred Fuchs, Erich Hell, Wolfgang Knupper, Detlef Mattern
Estimating the term…
The invention relates to a radiation converter having a radiation absorber (2) for generating photons in a manner dependent on the intensity of impinging x-ray radiation, having a photocathode (3) arranged downstream of the radiation absorber (2) in the radiation direction at a distance (a) and serving for generating electrons in a manner dependent on the photons emerging from the radiation absorber (2), having a device for accelerating the electrons emerging from the photocathode onto an electron detector (5) for generating electrical signals in a manner dependent on the impinging electrons, and having an electron multiplier (4) arranged between the photocathode (3) and the electron detector (5), in which case the electrons emerging from the photocathode (3) can be multiplied by the electron multiplier (4).
A radiation converter having a radiation absorber (2) for generating photons in a manner dependent on the intensity of impinging x-ray radiation,
The radiation converter as claimed in one of the preceding claims, in which case the photocathode (3) is opaque.
The radiation converter as claimed in one of the preceding claims, in which case the photocathode (3) is produced from a metallic material which preferably contains gold, cesium, copper or antimony.
The radiation converter as claimed in one of the preceding claims, in which case the photocathode (3) is formed as a layer on the electron multiplier (4).
The radiation converter as claimed in one of the preceding claims, in which case the electron multiplier (4) is formed as a layer on the electron detector (5).
The radiation converter as claimed in one of the preceding claims, in which case the electron multiplier (4) has a perforated plastic film preferably produced from polyimide.
The radiation converter as claimed in one of the preceding claims, in which case the radiation absorber (2), the electron multiplier (4) and the electron detector (5) are accommodated in a common gastight housing (1).
The radiation converter as claimed in one of the preceding claims, in which case a gas absorbing UV photons is accommodated in the housing (1).
The radiation converter as claimed in one of the preceding claims, in which the gas has at least one of the following constituents:
The radiation converter as claimed in one of the preceding claims, in which the radiation absorber (2) is produced from a scintillator material which preferably has an acicular structure comprising CsI:Na.
The radiation converter as claimed in one of the preceding claims, in which the electron detector (5) is embodied as a 2D thin-film panel.
The radiation converter as claimed in one of the preceding claims, in which the 2D thin-film panel is formed from a-Se, a-Si:H or poly-Si.
Dependencies are inferred from the claim text.