Event Driven X-ray CCD Detector Arrays for the Reflection Grating Spectrometer on the Constellation-X Mission

Details Event Driven X-ray CCD Detector Arrays for the Reflection Grating Spectrometer on the Constellation-X Mission Event Driven X-ray CCD Detector Arrays for the Reflection Grating Spectrometer on the Constellation-X Mission

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.1203r&link_type=abstract

American Astronomical Society Meeting 207, #12.03; Bulletin of the American Astronomical Society, Vol. 37, p.1170

Astronomy and Astrophysics

Astronomy

Scientific paper

The Reflection Grating Spectrometer (RGS) on Constellation-X will provide very high spectral resolution in the low energy X-ray band below 2 keV, where most atomic features are located. A baseline value for the RGS of E/deltaE > 300 is planned, with values of E/deltaE 3000 being discussed as a possible goal for an offplane grating design. Thus, the RGS will complement Constellation-X's X-ray microcalorimeter, which has its highest spectral resolution at energies greater than 2 keV. The Reflection Grating Spectrometer Focal Plane Camera (RFC) reads out the RGS spectra by means of a long array of extended low-energy response, event-driven silicon CCDs (EDCCDs). The current instrument baseline calls for coverage of the X-ray energy (wavelength) range from 0.25 to 2 keV (6 - 50 Å) in an elongated, multi-CCD array. The back-illuminated EDCCD can accomodate these goals, by providing rapid frame rates ( ˜ 30 Hz) at non-cryogenic temperatures ( ˜ -20C or higher), for power requirements ˜ 100x less than for conventional CCDs. The status of both the RFC detector and array technologies will be presented.

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