Performance Characteristics Of CCD's For The Acis Experiment

The Advanced X-ray Astrophysics Facility CCD Imaging Spectrometer (ACIS) will use two arrays of CCD's to provide X-ray imaging and spectroscopy. Spectroscopy at medium resolution with the imaging array is accomplished by pulse height analysis of each X-ray interaction, while for high spectral resolution, an objective grating disperses the spectrum across a linear array of CCD's to provide a dispersed spectrum where the wavelength resolution is determined by the telescope imaging properties. Performance data for CCD's manufactured by Texas Instruments, MIT Lincoln Laboratory and Ford Aerospace Corp. will be presented. Plans for future CCD enhancements will be discussed.