The status of the Constellation-X mission

The Constellation-X Reflection Grating Spectrometer (RGS) is designed to provide high-throughput, high-resolution spectra in the long wavelength band of 6 to 50 Å. In the nominal design an array of reflection gratings is mounted at the exit of the Spectroscopy X-ray Telescope (SXT) mirror module. The gratings intercept and disperse light to a designated array of CCD detectors. To achieve the throughput (A eff > 1000 cm 2 below 0.6 keV) and resolution (∆λ/λ > 300 below 0.6 keV) requirements for the instrument we are investigating two possible grating designs. The first design uses inplane gratings in a classical configuration that is very similar to the XMM-Newton RGS. The second design uses offplane gratings in a conical configuration. The off-plane design has the advantage of providing higher reflectivity and potentially, a higher spectral resolution than the in-plane configuration. In our presentation we will describe the performance requirements and the current status of the technology development.

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The Constellation-X reflection grating spectrometer

Cottam

Cash²,

Flanagan

et al. 2006

SPIE Proceedings

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The status of the Constellation-X mission

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The Constellation-X reflection grating spectrometer

The Constellation-X reflection grating spectrometer

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