Abstract:
The invention relates to a scanning radiographic device consisting of an ionising radiation source, a collimator (10) in the form of a longitudinal slit for forming a flat radiation beam (3) and a device for recording the radiation ray passed through a studied object. Said radiation ray recording device comprises data read out, processing and output electronic units (12) and at least one ionising particle detector. A flat capacitor provided with a nonslotted anode (7) and a cut into strips cathode (8) is arranged in the detector body (6) where the radiation passed through the studied object comes up. The length of the strips is selected according to a condition that X-radiation is entirely absorbed by gas. An individual accumulating capacitor whose charge is read out by an electronic unit is connected to each strip, thereby enabling the device to operate in an integrated mode. Said detector is also provided with additional inserts (9, 11) which are arranged at a radiation input and at the end along the ray trace, thereby reducing X-ray losses, setting a required resolution in the scanning direction and reducing requirements to a permissible vibration level and a calibration of the scanning system components
Abstract:
Die Erfindung betrifft eine Röntgendosismessvorrichtung mit einer ersten Kondensatorplatte (1) und einer zweiten Konden- satorplatte (2), die in einer Kammer angeordnet sind oder Teile einer Kammer (4) bilden, wobei die Kammer (4) mit einem gasförmigen Medium gefüllt ist, und wobei - die erste Kondensatorplatte (1) auf ihrer der zweiten Kondensatorplatte (2) zugewandten Seite ein aktives Messfeld (5) aufweist, und - die zweite Kondensatorplatte (2) auf ihrer der ersten Kondensatorplatte (1) zugewandten Seite eine Elektronen emittierende Röntgenabsorptionsschicht (6) aufweist.
Abstract:
The invention relates to an x-ray dosimeter comprising a first capacitor plate (1) and a second capacitor plate (2) which are arranged in a chamber or form parts of a chamber (4), said chamber (4) being filled with a gaseous medium. The first capacitor plate (1) comprises an active measuring field (5) on the side thereof facing the second capacitor plate (2), and the second capacitor plate (2) comprises an electron-emitting x-ray absorption layer (6) on the side thereof facing the first capacitor plate (1).
Abstract:
A detector (64) for detection of ionizing radiation, an apparatus for use in planar beam radiography, comprising such a detector, and a method for detecting ionizing radiation. 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 well-defined avalanches the means for electron avalanche amplification includes a plurality of avalanche regions.