The AXAF CCD imaging spectrometer

Details The AXAF CCD imaging spectrometer The AXAF CCD imaging spectrometer

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aiaa.confq....g&link_type=abstract

AIAA, Space Programs and Technologies Conference, Huntsville, AL, Mar. 24-27, 1992. 8 p.

Astronomy and Astrophysics

Astrophysics

Charge Coupled Devices, Focal Plane Devices, Imaging Spectrometers, Spaceborne Astronomy, X Ray Astrophysics Facility, Arrays, Pixels, Radiation Damage, X Ray Astronomy

Scientific paper

The current status of the instrument design and the status of the CCDs being fabricated for the AXAF CCD Imaging Spectrometer (ACIS) are summarized. The instrument consists of an image recording array of CCDs and a linear arrangement of CCDs to record the spectra formed by the objective grating spectrometer. Both arrays employ CCDs with pixel dimensions which correspond to about 0.5 arcsec samples of the image. The CCDs provide moderate spectral resolution and good detection efficiency over the energy range 0.5 to 10 keV. Spectral resolution of 200 or more is achievable using the objective grating with the grating array. Radiation damage effects are shown to degrade the energy resolution of CCDs. Specially designed CCD pixel architecture is employed together with shielding and low temperature operation to slow the effects of radiation damage.

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