Abstract
A fast one-coordinate x-ray detector of a new design aimed for angular measurements in diffraction experiments was developed in BINP. The detector is based on a multiwire proportional chamber with x-ray absorption drift volume. It allows acceptance of photons in the energy range from 6 keV to 20 keV with a maximum rate of 10 MHz/detector and coordinate resolution about 0.1 mm (rms) in linear scale. The first OD-3 chamber has a 0.4-mm-thick Be inlet window 200 mm x 10 mm, a photoabsorbtion length of 50 mm, and a parallax-free cathode structure for angles up to ±15 degrees at variable focal length (from 300 mm to 450 mm without any modification and to infinite at cathode plane replacement). The first tests of the detector at synchrotron radiation beamline 5-b VEPP-3 and with a x-ray tube show a good performance. The detector construction specifics and test results will be discussed in the report.
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