• L.A. Dahl, W.A. Barth, P. Gerhard, S. Mickat, W. Vinzenz, H. Vormann
  GSI, Darmstadt
• A. Schempp, M. Vossberg
  IAP, Frankfurt am Main

The GSI linear accelerator UNILAC provides heavy ion beams at Coulomb barrier energies for search and study of super heavy elements. Typical cross-sections of 55 fb require beam doses of 1.4·10¹⁹ according to a beam time of 117 days. Several upgrades will reduce the beam time to only 16 days. A second injection branch with a 28GHz-MS-ECRIS anticipates a factor of 10 in particle intensity. By a new cw rfq-structure all accelerator tanks are suitable for a duty cycle of at least 50% instead of 25% presently. Due to this, thermal power increase of 19 rf-amplifiers eased by higher ion charge states of the ECRIS is necessary. Finally the UNILAC timing system controlling 50Hz pulse-to-pulse operation of up to six beams differing in ion species and energy has to be modified considering beam diagnostics electronics and pulsable magnets. The front end comprising ECRIS, rfq- and IH-structure is cw suitable and will serve as injector for a new future sc-cw-linac.

• M. Vossberg, A. Schempp, C. Zhang
  IAP, Frankfurt am Main
• W.A. Barth, L.A. Dahl
  GSI, Darmstadt

A new CW-RFQ has been built for the upgrade of the HLI (High Charge State Injector) of GSI for operating with a 28GHz-ECR-Ion source and simultaneous increase of the beam duty cycle from 25 % now to 100 %. The new HLI 4-rod RFQ will accelerate charged ions from 4 keV/u to 300 keV/u for the injection into the IH-structure. High beam transmission, a small energy spread and small transverse emittance growth and good input matching are design goals. Properties of this CW-RFQ, status of project and first measurements will be presented.

• M. Okamura, J.G. Alessi, E.N. Beebe, K. Kondo, R.F. Lambiase, V. LoDestro, R. Lockey, M. Mapes, A. McNerney, D. Phillips, A.I. Pikin, D. Raparia, J. Ritter, L. Smart, L. Snydstrup, A. Zaltsman
  BNL, Upton, Long Island, New York
• T. Kanesue
  Kyushu University, Hakozaki
• A. Schempp, J.S. Schmidt, M. Vossberg, C. Zhang
  IAP, Frankfurt am Main
• J. Tamura
  Department of Energy Sciences, Tokyo Institute of Technology, Yokohama

The EBIS based preinjector for the RHIC is now being commissioned. During the step-wise commissioning of the preinjector from January 2009 to June 2010, the RFQ was commissioned first using Test EBIS in January 2009 and then moved to its final location and commissioned again with RHIC EBIS in March 2010. The RFQ accelerates ions from 17 keV/u to 300 keV/u and operates at 100.625 MHz. The RFQ is followed by a short (81 cm) Medium Energy Beam Transport (MEBT), which consists of four quadrupoles and one buncher cavity. Temporary diagnostics for this commissioning included an emittance probe, TOF system, fast Faraday cup, and beam current measurement units. This contribution will report results of RFQ and MEBT commissioning with helium and gold beams.

• 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.