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Zhao, J.

Paper Title Page
MOP025 An Intermediate Structure SFRFQ Between RFQ and DTL 118
  • Y.R. Lu, J.E. Chen, J.X. Fang, S.L. Gao, Z.Y. Guo, M. Kang, S.X. Peng, Z. Wang, X.Q. Yan, M. Zhang, J. Zhao, K. Zhu
    PKU/IHIP, Beijing

Funding: supported by NSFC 10455001
Longer the RFQ length is, lower kinetic energy gain per unit length is; lower the injection energy DTL is, much higher accelerating efficiency is; more accelerating gaps at DTL entrance means stronger transverse focusing is needed for the beam. SFRFQ is such an intermediate structure, which combines RFQ and DTL together, it can increase the accelerating efficiency at RFQ high energy end by inserting gap acceleration between RFQ electrodes while provide strong focusing by RFQ focusing field. One prototype cavity has been manufactured and will be used as a post accelerator of ISR RFQ to accelerate O+ from 1 MeV to 1.6 MeV in 1meter. A code SFRFQCODEV1.0 was developed for the beam dynamics design. The rf conditioning and full rf power test has been carried out. The intervane or gap voltage have reached 86 kV at 29 kW with 1/6 duty cycle and repetition frequency 166 Hz. The initial beam test results will also be presented in this paper.