Abstract
The Advanced Photon Source will be the brightest source of synchrotron X-rays when it becomes operational in 1996. During normal operation, the ring will be filled with 20 bunches of positrons with an interbunch spacing of 184 ns and a bunch width of 72 ps. To perform experiments with X-rays generated by positrons on these time scales, one needs extremely high speed detectors. To achieve the necessary high speed, we are developing MBE-grown CdTe-based photoconductive position sensitive array detectors. The arrays fabricated have 64 pixels with a gap of 100 μm between the pixels. The high speed response of the devices was tested using a short pulse laser. X-ray static measurements were performed using an X-ray tube and synchrotron radiation to study the device's response to flux and wavelength changes. In this paper, we shall present the response of the devices to some of these tests and also discuss different physics aspects that need to be considered when designing high speed detectors.
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