A comparison of charge transfer efficiency measurement techniques on proton damaged n-Channel CCDs for the Hubble Space Telescope wide-field camera 3

We examine proton-damaged charge-coupled devices (CCDs) and compare the charge transfer efficiency (CTE) degradation using extended pixel edge response, first pixel response, and [sup.55]Fe X-ray measurements. CTEs measured on Marconi and Fairchild imaging sensors CCDs degrade similarly at all signal levels, though some of the Fairchild CCDs had a supplementary buried channel. Index Terms--CTE, CTE noise, EEPR, EEV, FPR, minichanuel, proton radiation damage, radiation testing, SBC, scientific CCD, WFC3.