The terminal vibration of laser spot tail in dual channel type linear CCD

A special phenomenon about laser spot tail in dual channel type linear CCD is studied. In the CCD, the charges packets in odd and even number pixels are respectively transferred by two channels, in which, the threshold difference of surface full well induces the length difference of spot tails. So, the terminal vibration of spot tail is caused. A simulation of this phenomenon is given and qualitatively validated by the experiment results of laser irradiating a dual channel type linear CCD. In the experiment, the phenomenon has been used to estimate relative size of surface full well thresholds in two channels of CCD.