1. A super-periodic radio frequency quadrupole focused structure for the general part of the ion linac
2. D.A. Swenson, et al., Proceedings of the 1998 LINAC Conference, Chicago, IL, 1998, p. 648.
3. M. Odera, M. Hemmi, Proceedings of the 1984 Linear Accelerator Conference, GSI-Darmstadt, Germany, 1984, p. 346.
4. J.E. Chen, J.X. Fang, et al., The beam test of a 26MHz ISR RFQ at Peking University, Proc. of EPAC, 1994.