PUNCH Flight Detector Characterization

The Polarimeter to Unify the Corona and Heliosphere (PUNCH) mission is a four-spacecraft observatory designed for low earth orbit observations of the Sun to understand better the solar wind. Each of the four observatories carries a Teledyne e2V 230-82 CCD controlled by a Rutherford Appleton Laboratories (RAL) detector controller and a filter wheel that allows for the selection of different polarization vectors and a blank off to monitor detector health. The CCD is 2kx4k pixels and has a store shield covering half the device to serve as a charge storage region. The CCDs are operated in pseudo frame transfer mode. We present here the laboratory optical calibration data for the four flight detector systems.