Physical design of a 10 MeV LINAC for polymer radiation processing

摘要

In China,polymer tadiation processing has become one of the most important processing industries.The radiation processing source may be an electron beam accelerator or a radioactive source.Physical design of an electron beam facility applied for radiation croaslinking is introduced in this paper because of it's much higher dose rate and efficiency.Main part of this facility is a 10 MeV travelling wave electron linac with constant impedance accelerating structure.A start to end simulation concerning the linac is reported in this paper.The codes Opera-3d,Poisson-superfish and Parmela are used to describe electromagnetic elements of the accelerator and track particle distribution from the cathode to the end of the linac.After beam dynamic optimization,wave phase velocities in the structure have been chosen to be 0.56,0.9 and 0.999 respectively.Physical parameters about the main elements such as DC electron gun,iris-loaded periodic structure,solenoids,etc,are presented.Simulation results proves that it can satisfy the industrial requirement.The linac is under construction.Some components have been finished.Measurements proved that they are in a good agreement with the design values.