Commissariat a L'energie Atomique

Henri Guers

Gaetan Pleyber

Jean-Paul Bonnefoy

Martine Drouet

The invention concerns an X-ray tomographic detector. This detector comprises a sealed chamber (4) containing a gas able to be ionized by X-rays having traversed a device or an object. This chamber comprises on a front face an X-ray inlet gate (5) and contains an X-ray detection unit (11). Connections means (27, 28, 29, 32, 33) traversing a rear face of the chamber (9) to link the detection means to measuring (14) and feed (15, 16) means outside the chamber. The detection means comprise electrodes (19) and a polarization plate (18) separated by an insulating brace (3) transparent to X-rays. According to the invention, this brace has the shape of frame. This frame rests firstly on the polarization plate (18) and secondly on conductive strips (22, 24) brought to the same potential reference (16) as that of the electrodes. Application for X-ray tomography.

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Grenoble, France

Henri Guers