Abstract: There is a problem about upper limit of energy in the RFQ structure, although it is wonderful low-energy-suited high current accelerating structure. The SFRFQ structure is an improved kind of traditional RFQ. The proposal is to adopt the βλ/4 thick disk pairs of non-symmetry disks structure. After optimizing the diaphragm type SFRFQ structure has both excellent energy gain and focusing shown by the simulation.

Key words: diaphragm type SFRFQ, βλ/4 thick disk, non-symmetry disks

摘要： 对光阑型SFRFQ加速结构进行了优化。经过计算作者提出了βλ/4弱膜片加薄膜片的不对称膜片对的SFRFQ优化结构，并在模拟计算中获得了较好的加速和聚焦效果。

关键词: 光阑型SFRFQ, βλ/4弱膜片, 不对称膜片对