A curved Micro-Strip Gas Counter for synchrotron radiation time resolved SAXS/WAXS experiments

We are constructing a positive-sensitive detector that is capable of detecting an X-ray diffraction pattern with a count rate of up to 1 MHz per channel. The channel width is 0.4 mm. etector is based on the Micro-Strip Gas Counter (MSGC) technology. The detecting and converting medium is argon or xenon gas. The wedge-shaped substrates carry charge-sensitive strips, which define detector channels in the counter gas pointing to the scattering centre, enabling parallax-free detection. ersion range of 4 cm along the strips is available, so the efficiency is higher than for conventional designs, while the count rate per centimetre strip is lower. We present test results on the rate capability and the energy resolution for a prototype.