INVESTIGATION OF ION SOURCES AND INJECTOR USED IN RFQ ACCELERATOR

摘要

Two kinds of PIG ion source with permanent magnet used for RFQ are developed, mA of O~+ and O~- beams can be extracted from them and O~- and O~+ ion ratio is 70-80%, respectively. The injector built for RFQ consists of ion sources, einzel lenses, steerer and funnel magnet et al. and the beam lines of the injector are calculated by LEADS program. And its beam transmission is of about 70-80%. It has been used in our 300kV and 1 MV integral sprit ring RFQ successively. The experiments of O~+ and O~- ion beam accelerated simultaneously were taken, several hundred μ A of O~+ and O~- ion beam accelerated by both RFQ was measured and the total current of O~+ and O~- ion beam accelerated simultaneously is far lager than that of O~+ or O~- ion beam accelerated singly.