Transmission function of the KATRIN experiment as a function of the surplus energy according to (41). The KATRIN default design settings [72] were used as follows: T, T, T. The upper horizontal axis illustrates the dependence of the maximum starting angle , which is transmitted at a given surplus energy. Clearly, electrons with larger starting angles reach the transmission condition later, since they still have a significant amount of cyclotron energy in the analyzing plane at .
