| 摘要 |
A detector (64) for detection of ionizing radiation, and an apparatus for us e in planar beam radiography, comprising such a detector. The detector comprises: a chamber filled with an ionizable medium; first and second electrode arrangements (2, 1, 18, 19) provided in said chamber with a space between them, said space including a conversion volume (13); means for electron avalanche amplification (17) arranged in said chamber; and, at least one arrangement of read-out elements (15) for detection of electron avalanches. A radiation entrance is provided so that radiation enters the conversion volume between the first and second electrode arrangements. In order to achieve detectors which is simple to stack with each other, the first and second electrode arrangements exhibit a first and a second main plane, said planes being non-parallel. Hereby an apparatus with stacked detectors can simply an d cost-effectively be manufactured.
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