STIS 1K x 1K photon counting array detector system

The Space Telescope Imaging Spectrograph (STIS) uses two 1K by 1K photon counting array (PCA) detector systems. Design of the PCA detector systems is described in this paper. These detector systems are similar in many ways and are mechanical mirror images of each other but cover different UV wavelength bands. A top-down design methodology was used to produce the two detector systems that feature: manufacturability, serviceability to the component level, system-level replacement without optical realignment or calibration, and a high level of parts commonality for cost control. The design meets the Space Telescope's structural, thermal, and electromagnetic compatibility requirements as well as electro-static discharge compatibility requirements of MIL-STD-1686A.