Direct measurements at the sub-pixel level of the X-ray detection efficiency of the CCD on board the ASCA satellite

Author

Yoshita, E. ; Tsunemi, H. ; Gendreau, E.C. ; Pennington, G. ; Bautz, M.W.

Author_Institution

Osaka Univ., Japan

Volume

45

Issue

3

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

915

Lastpage

920

Abstract

We present here a measurement at sub-pixel resolution of the X-ray detection efficiency of the CCD detector on board the ASCA satellite. A mesh placed in front of the CCD restricted the interaction position of the X-ray inside the CCD pixel. We clearly show that all the primary charge is collected in one pixel when the X-ray interaction is sufficiently far from the pixel boundary. Conversely, some photo-ionized charge is collected in neighboring pixels when the X-ray interacts near the pixel boundary. We also obtained the thickness of various elements gate structure, and measure channel stop dimensions. From these data, we can obtain more accurate estimates of the X-ray responsivity of the CCD

Keywords

CCD image sensors; X-ray astronomy; X-ray detection; astronomical instruments; cosmic ray apparatus; silicon radiation detectors; ASCA satellite; CCD detector; Si; X-ray detection efficiency; X-ray responsivity; channel stop dimensions; direct measurements; elements gate structure; interaction position; neighboring pixels; photo-ionized charge; sub-pixel level; Character generation; Charge coupled devices; Copper; Electromagnetic wave absorption; Electron beams; Electron tubes; Optical filters; Pixel; Temperature; X-ray detection;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.682668

Filename

682668