 ASCA's Solid-state Imaging Spectrometers
The construction of ASCA's two Solid-state Imaging Spectrometers (SIS) was a
joint effort of MIT, ISAS and Osaka University. Each SIS camera is based
around four, 420x422 square pixel CCD chips, abutted side-by-side, front-side
illuminated, operated in frame-store configuration.
The "vital statistics" of the SIS are as follows:
- Energy Range: 0.4 keV to 10 keV keV
- Energy Resolution: 2 percent at 5.9 keV
- Field of View: 22 by 22 arcmin square
Effective area and energy resolution of SIS and GIS
Cross section of SIS (figure was taken from K.C.Gendreau's thesis).
Left:Four individual CCDs are combined in a single package to
make a single SIS focal plane (figure was taken from K.C.Gendreau's thesis).
Right:Configuration of the two SIS on the ASCA focal plane.
More SIS Information
- Further information of the SIS instrument can be obtained from the ASCA SIS page at HEASARC.
References:
Keith C. Gendreau's doctoral thesis (1995,
MIT), "X-Ray CCD Calibration; X-Ray CCD Radiation Damage Evaluation and Modeling; Use
of CCDs to Measure the Spectrum of the Cosmic X-Ray Backgrounds with ASCA"
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