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Solid state slit camera (SSC) of the MAXI mission for JEM (Japanese Experiment Module) on the International Space Station (ISS)

Monitor of the All-sky X-ray Image (MAXI) is the first payload for the Japanese Experiment Module (JEM) on the International Space Station (ISS). It is designed for monitoring all-sky in the X-ray band. Its angular resolution and scanning period are about 1 arc-degree and 100 minutes, respectively. MAXI employs two types of X-ray camera. One is Gas Slit Camera (GSC), the detectors of which are one dimensional position sensitive proportional counters. Another is Solid-state Slit Camera (SSC). We mainly report on SSC. We employ a pair of SSCs, each of which consists of 16 CCD chips. Each CCD chips has 1024 X 1024 pixels, and the pixel size is 24 X 24 micrometer. The CCDs are to be operated at -60 degrees Celsius using Peltier coolers. Optical light is blocked by aluminum coat on the CCDs instead of fragile aluminized film. SSC achieves an energy resolution of 152 eV in FWHM at 5.9 keV. The energy range is 0.5 - 10 keV.