Abstract
A new photon-counting area detector, based on parallel-plate gas amplification with a resistive anode and remote readout electrode is described. The detector is sealed and has sensitive area of 14x14 cm<sup>2</sup>. The detector is unique in its ability to achieve high gain at high counting rates. A local counting rate >10e<sup>5</sup> counts/mm2-sec has been achieved at a gain of 10<sup>5</sup> in a radiation-hard, non-polymerizing gas mixture. The global readout rate is limited by the delay line and electronics to <10<sup>6</sup> counts/sec but more sophisticated readout schemes should allow this rate to be increased by more than an order of magnitude. The operating characteristics of the detector are described and preliminary x-ray diffraction data are presented.
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