Abstract: A sterilization system seals a first end portion of a first tube and a second end portion of a second tube under sterile conditions. The sterilization system includes a sterilization chamber and an electron gun which generates a distribution of electrons in the sterilization chamber. The sterilization system further includes a spindle and a holder which places and rotates a connector in the distribution of electrons. The sterilization system further includes first and second tube holders each having curved walls movably coupled to the sterilization chamber to move between a first position where the respective end portion is separated from the connector and a second position where the respective end portion is coupled to the connector. Each curved wall has a shape such that x rays generated within the sterilization chamber undergo at least three interactions with the curved walls before propagating outside the tube holders.