• Y. Liu, X. Du, X.H. Guo, Y. He, S. Sha, A. Shi, L.P. Sun, Z. Xu, W.-L. Zhan, H. Zhao
  IMP, Lanzhou
• R.A. Jameson, A. Schempp, M. Vossberg, H. Zimmermann
  IAP, Frankfurt am Main
• M. Okamura
  BNL, Upton, Long Island, New York

A compact RFQ for carbon ion beam from a Laser-ion souce is being tested in IMP, Lanzhou. It is the first example of LINAC structures for IMP. Testing schemes and first results are presented.

• Z.L. Zhang, X.H. Guo, Y. He, Y. Liu, S. Sha, A. Shi, L.P. Sun, H.W. Zhao
  IMP, Lanzhou
• R.A. Jameson, A. Schempp
  IAP, Frankfurt am Main
• M. Okamura
  BNL, Upton, Long Island, New York

A RFQ has been designed and built for research of direct plasma injection scheme (DPIS), which can provide high current and highly charged beams. Because of the strong space charge forces of beam from laser ion source, the beam dynamics design of the RFQ was carried out with a new code LINACSrfq which can treat space charge effectively due to equipartitioning design strategy. Another feature of the RFQ is its high energy gain in two-meter long which will be described in detail. Construction of the RFQ cavity and the 100MHz/250kW amplifier has been completed and ready for test. A laser ion source is being tested. The assembling of the whole system including the ion source, the RFQ, the beam analyzing and diagnostic system is being done. Preliminary test results will be presented.

• J.M. Maus, R.A. Jameson, A. Schempp
  IAP, Frankfurt am Main

For the development of high energy and high duty cycle RFQs accurate particle dynamic simulation tools are important for optimizing designs, especially in high current applications. To describe the external fields in RFQs as well as the internal space charge fields with image effect, the Poisson equation has to be solved taking the boundary conditions into account. In PteqHI a multigrid Poisson solver is used to solve the Poisson equation. This method will be described and compared to analytic solutions for the Two-term-potential to verify the answer of the Poisson solver.