Modelling Charge Coupled Device Readout: Simulation Overview and Early Results

Details Modelling Charge Coupled Device Readout: Simulation Overview and Early Results Modelling Charge Coupled Device Readout: Simulation Overview and Early Results

2002-11-29

arxiv.org/abs/astro-ph/0211652v1

Astronomy and Astrophysics

Astrophysics

33 Pages, 12 figures

Scientific paper

The Calibration enhancement effort for the Space Telescope Imaging Spectrograph (STIS) aims to improve data calibration via the application of physical modelling techniques. We describe here a model of the Charge Transfer process during read-out of modern Charge Coupled Devices, and its application to data from STIS. The model draws upon previous investigations of this process and, in particular, the trapping and emission model developed by Robert Philbrick of Ball Aerospace. Early comparison to calibration data is encouraging. Essentially, a physical description of the STIS CCD combined with the physics of known defects in the silicon lattice expected to arise in a hostile radiation environment, is enough to yield results which approximately match real data. Uncertainties remain, however, in the details of the model and the physical description of STIS.

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