LSST sensor requirements and characterization of the prototype LSST CCDs

Abstract

LSST parameters are discussed and requirements on the LSST camera are presented. Characterization methods and results on a number of new devices produced specifically to address LSST's performance goals, including flatness, QE, full well capacity, linearity, dark current, read noise, CTE, and image persistence are presented. The results indicate that commercially produced, thick n-channel over-depleted CCDs can achieve excellent red response, high CTE, low dark current and satisfy LSST requirements with no evidence of persistent image artifacts. We will also report ongoing studies of mosaic assembly techniques to achieve chip-to-chip co-planarity, high fill factor, and thermal stability.