Experimental studies on secondary electron emission characteristics of accelerator chamber materials

The electron multipacting effect that occurs in the accelerator vacuum tubes and radio frequency cavity has a significant impact on beam quality and normal operation of the accelerator. The multipacting effect and electron cloud effect are closely related to secondary electron emission (SEE) characteristics. In this paper, secondary electron yield (SEY), its dependence on incidence angle, spatial and energy distribution of secondary emission electrons and SEY depression as a function of deposited electron dose for Cu are measured. And the SEY of ceramic samples are successfully measured by effective charge neutralization.