Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3445..593y&link_type=abstract
Proc. SPIE Vol. 3445, p. 593-602, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, Oswald H. Siegmund; Mark A. Gummin
Astronomy and Astrophysics
Astronomy
Scientific paper
We report here the experimental result between the x-ray interaction location and the split event. The x-ray interaction position can be localized in subpixel scale using the mesh experiment. We found that the center of gravity of the split even well correlated with the x-ray interaction position. We analyzed the data using two models, assuming the charge cloud shape: one is the rectangular model and the other is the Gaussian model. Although we could not distinguish between them, we obtained the standard deviation of the charge cloud shape of 1-2 micrometers for x-rays of Y-L, Ag-L and Ti-K. When the x-rays enter near the pixel boundary, the charge splits into adjacent pixel, in which we can achieve the accuracy of the x-ray interaction position of subpixel spatial resolution of 1.5-2.2 micrometers . We expect that the x-ray CCD can function as x-ray imager with subpixel resolution useful for the high spatial resolution optics.
Bautz Mark W.
Gendreau Keith Charles
Hiraga Junko
Tsunemi Hiroshi
Yoshita Kumi
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