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| MOCO-A02 |
Status Report and Recent Developments with VENUS
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- D. Leitner, J. Y. Benitez, D. R. Dietderich, R. Hannaford, M. Leitner, C. M. Lyneis, S. Prestemon, D. S. Todd
LBNL, Berkeley, California
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Since the superconducting ECR ion source VENUS started operation with 28 GHz microwave heating in 2004, it has produced record ion beam intensities such as 860 euA of Ar12+, 200 euA of U34+, or in respect to high charge state ions, 270 euA of Ar16+, 1 euA of Ar18+ and .4 euA of Xe42+. In August of 2006 VENUS has been connected to the 88-Inch Cyclotron as the third injector ion source extending the energy range and available heavy ion beam intensities from the cyclotron. This paper will highlight recent developments and results. In addition, the paper will give an update on the ongoing VENUS repair. Following an unexpected quench in January of 2008, the sextupole coils could not be energized. Most likely the quench was caused by the loss of liquid helium in the upper cryostat, which resulted in localized heating of the lead wire and consequent quenching. After opening the cryostat, it was found that one of the current carrying leads of the sextupole magnet was burned. The wire damage made it necessary to open the cold mass and extract the coil assembly for the repair. An update on the major undertaking of repairing the VENUS magnet and rebuilding the cryostat will be presented.
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Slides
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