G - Physics – 01 – T
Patent
G - Physics
01
T
358/34
G01T 1/185 (2006.01) H01J 47/02 (2006.01)
Patent
CA 1121922
26.10.78 PHD 77-126 ABSTRACT: The invention relates to a radiation detection device, comprising a housing which comprises an entrance window and in which at least one ionization chamber detec- tor is arranged. The detector comprises a flat high-voltage electrode which is directed transversely of the entrance window and a flat collector electrode which is arranged to be at least substantially parallel thereto. The end faces of these electrodes which face the entrance window are in electrically conductive contact with a flat auxiliary electrode which extends parallel, to the entrance window. As a result, a small direct current flows in the direction transversely of the other electrodes during operation, because the auxiliary electrode has a low electrical con- ductivity. Consequently, the electrical field in the ioni- zation chamber detector is very homogeneous, with the re- sult that optimum adjustment of the detector in respect of measuring speed can be realized.
315183
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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