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)