Energy instability strongly affects the state and the beam size of the single ion mi-crobeam.A facility based on the Generating Voltmeter was developed to improve the energystability of the CAS-LIBB (Chinese Academy of Sciences,key laboratory of ion beam bioengineer-ing) single ion microbeam.This paper presents the analysis of the energy instability of the singleion microbeam.A simplified theoretical model is set up to calculate the relationship between theenergy instability and the beam spot size.By using this technique,the energy instability is ad-justed to about 1%.Stable run-time is over 6 hours.The radius of the single ion beam is reducedby 10% compared to the previous one.
展开▼
