Benitez J Y, Franzen K Y, Hodgkinson A, Loew T, Lyneis C M, Phair L, Saba J, Strohmeier M, Tarvainen O
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Rev Sci Instrum. 2012 Feb;83(2):02A311. doi: 10.1063/1.3662119.
The 28 GHz Ion Source VENUS (versatile ECR for nuclear science) is back in operation after the superconducting sextupole leads were repaired and a fourth cryocooler was added. VENUS serves as an R&D device to explore the limits of electron cyclotron resonance source performance at 28 GHz with its 10 kW gryotron and optimum magnetic fields and as an ion source to increase the capabilities of the 88-Inch Cyclotron both for nuclear physics research and applications. The development and testing of ovens and sputtering techniques cover a wide range of applications. Recent experiments on bismuth demonstrated stable operation at 300 eμA of Bi(31+), which is in the intensity range of interest for high performance heavy-ion drivers such as FRIB (Facility for Rare Isotope Beams). In addition, the space radiation effects testing program at the cyclotron relies on the production of a cocktail beam with many species produced simultaneously in the ion source and this can be done with a combination of gases, sputter probes, and an oven. These capabilities are being developed with VENUS by adding a low temperature oven, sputter probes, as well as studying the RF coupling into the source.
28吉赫兹离子源VENUS（用于核科学的通用电子回旋共振装置）在超导六极杆引线修复并添加了第四台低温制冷机后重新投入运行。VENUS作为一种研发设备，利用其10千瓦回旋振荡管和最佳磁场探索28吉赫兹电子回旋共振源性能的极限，同时作为一种离子源，增强88英寸回旋加速器在核物理研究及应用方面的能力。炉体和溅射技术的开发与测试涵盖了广泛的应用领域。最近对铋进行的实验表明，Bi(31+)在300电子微安时运行稳定，该强度范围对于诸如稀有同位素束流装置（FRIB）等高性能重离子驱动器而言是令人感兴趣的。此外，回旋加速器的空间辐射效应测试项目依赖于在离子源中同时产生多种离子的混合束流，这可以通过气体、溅射探针和炉体的组合来实现。VENUS正通过添加低温炉体、溅射探针以及研究射频耦合到离子源的情况来拓展这些能力。
