[en] Commissioning of the superconducting ECR ion source, VENUS, at 28 GHz began in May 2004. In its first four months of operation at this frequency, it has produced a number of intense heavy ion high charge state beams such as 320 eμA of Xe²⁰⁺ and 240 eμA of both Bi²⁵⁺ and Bi²⁹⁺. The intensities of these beams meet or exceed the requirements for the RIA driver linac ion source. Emittance measurements on bismuth also fall within the acceptance for the proposed accelerator. VENUS has also produced very high charge states beams including 11 eμA of Bi⁴³⁺ and 1 eμA of Bi⁴³⁺ and 1 eμA of Bi⁴⁹+ that can be used for the 88-Inch Cyclotron. In the paper, we describe the performance of VENUS at 18 and 28 GHz, the design and operation of the 28 GHz gyrotron, measurements of the bremstrahlung heating of the cryogenic system and plants for further development. (author)

[en] VENUS (Versatile ECR ion source for NUclear Science) is a next generation superconducting ECR ion source, designed to produce high current, high charge state ions for the 88-Inch Cyclotron at the Lawrence Berkeley National Laboratory. VENUS also serves as the prototype ion source for the RIA (rare isotope accelerator) front end. The goal of the VENUS ECR ion source project as the RIA R and D injector is the production of 200 eμA of U³⁰⁺, a high current medium charge state beam. On the other hand, as an injector ion source for the 88-Inch Cyclotron the design objective is the production of 5 eμA of U⁴⁸⁺, a low current, very high charge state beam. To achieve those ambitious goals, the VENUS ECR ion source has been designed for optimum operation at 28 GHz. The nominal design fields of the axial magnets are 4 T at injection and 3 T at extraction; the nominal radial design field strength at the plasma chamber wall is 2 T, making VENUS currently the world's most powerful ECR plasma confinement structure. Recently, the six year project has made significant progress. In June 2002, the first plasma was ignited at 18 GHz. During 2003, the VENUS ECR ion source was commissioned at 18 GHz, while preparations for 28 GHz operation were being conducted. In May 2004 28 GHz microwave power has been coupled into the VENUS ECR ion source for the first time. Preliminary performance-tests with oxygen, xenon and bismuth at 18 GHz and 28 GHz have shown promising results. Intensities close to or exceeding the RIA requirements have been produced for those few test beams. The paper will briefly describe the design of the VENUS source and its beam analyzing system. Results at 18 GHz and 28 GHz including first emittance measurements will be described

[en] This document gathers the summaries of the presentations made at ICIS05 (international conference on ion sources). It can be organized into 3 main topics: 1) 'fundamentals and theory' that deals with plasma, beam extraction, transport and emittance, diagnostics and simulation; 2) 'various types of ion sources' that include ECRIS, EBIS, microwave, negative, radioactive, polarized and laser ion sources, and charge breeders; and 3) 'ion sources and applications' in fields like accelerator injection, fusion energy, space propulsion, mass spectrometry, and neutron and cluster and rare nuclide production