摘要
In recent years, the idea for undulator based Positron source had become a current design for international linear Collider (ILC). This design is that the beam from the electron main linac passes through a long helical undulator to generate a highly polarized and multi-Mev photon beam which hits a thin metal rotating target to generate showers of Positron[1]. During this procedure, the multi-Kev energy Positron will heat target and then damage the rotating target system[2].
