Goal: We discuss the evolution of CTI and its impact on spectral resolution for X-ray CCDs in different orbital environments. We specifically prepare models of the energy scale and resolution as a function of the background, CCD type (FI vs. BI), and application of charge injection, considering energies spanning the CCD range. Outline: - CTI evolution (energy scale, FWHM) - effects of different radiation environments - effects of SCI - calibration sources from corners (Mn K alpha, akin to LaMarr 2008) - compare ACIS and XIS - calibration sources (all energies?) across FOV - ACIS only - celestial calibration sources (1 keV, 6 keV) across FOV - Cygnus Loop, Perseus, E0102, N132D, other clusters - separate CTI from electronics gain - verify gain change negligible - checker-flag CI (Ozawa 2009) - Cygnus Loop/Perseus at different roll angles (XIS) - (are we interested in electronics performance?) - CTI of FI vs. BI - soft proton damage - effects of BG sac charge (Grant 2005 SPIE, LaMarr 2008 SPIE)
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