DEVELOPMENT OF I-129 AMS FOR THE LLNL SPECTROMETER

The multi-user tandem laboratory at LLNL was designed to be a versatil e facility which could be configured to develop new capabilities as de termined by the requirements of sponsoring agencies and experimental p rograms. The initial design made some compromises, driven by both the usual budgetary constraints and uncertainties in program needs and sup port. We were recently funded by the Office of Arms Control in the U.S . DOE to develop an I-129 AMS capability. The first I-129 measurements were performed this year after upgrades and modifications to the orig inally installed components were completed. The configuration of the p resent spectrometer and performance achieved to date will be described . Planned improvements to the injector and high energy spectrometer wi ll be outlined.