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MAMA Detector Systems: A Status Report

A number of different MAMA detector systems are now in use at both ultraviolet and visible wavelengths. MAMA detectors with formats of 256 x 1024 pixels and with pixel dimensions of 25 x 25 microns2 are being used in the laboratory and at ground-based telescopes and an ultraviolet version has recently been flown on a Black Brant sounding rocket. Third-generation (224 x 960)-pixel MAMA detectors with 25 x 25 microns2 pixels are also being used in the laboratory and at ground-based telescopes and a (224 x 960)-pixel detector with 14 x 14 microns2 pixels is currently under test in the laboratory. Third-generation MAMA detectors with formats of 360 x 1024 pixels are under development for use at extreme ultraviolet (EUV) wavelengths on the European Space Agency/NASA Solar and Heliospheric Observatory (SOHO) mission and detectors with 1024 x 1024 and 2048 x 2048 pixels are under development for use at ultraviolet and far ultraviolet (FUV) wavelengths on the NASA Goddard Space Flight Center's Hubble Space Telescope Imaging Spectrograph (STIS). Both of these detectors have pixel dimensions of 25 x 25 microns2. This paper describes the configurations, modes-of-operation and some of the latest performance data for the different detector systems.