The Advanced Camera for Surveys (ACS) will be installed in the Hubble SpaceTelescope during HST servicing mission 3B, currently scheduled for late2001. ACS has three imaging channels, the Wide Field Camera (WFC), the HighResolution Camera (HRC), and the Solar Blind Camera (SBC). WFC is a highthroughput (45% at 700 nm, including the HST OTA), wide field (200"x204"),optical and I-band imager based on a 4kx4k CCD mosaic. The HRC iscritically sampled (500 nm), with a 26"x29" field of view, a peakthroughput of 25% at 500 nm, and an NUV optimized 1kx1k CCD. The HRCoptical path will include a coronagraph which will improve the HST contrastnear bright objects by a factor of 10. The SBC is a far ultraviolet imager,with a throughput of 6% at 121.6 nm, over a 26"x29" field of view andemploys a flight spare MAMA detector from the Space Telescope ImagingSpectrograph (STIS) program. We will review the performance of the flightdetectors selected for ACS and highlight their contribution to scientificdiscovery space of ACS. We also discuss the impact of the space environmenton ACS and present the results of ground-based radiation testing of thedevices.
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