| IAEA-CN-115-9 · Continuous-Flow Accelerator Mass Spectrometry
M.L. Roberts1, K.F. von Reden1, B.X. Han1, R.J. Schneider1, A. Benthien2, and J.M.
Hayes1
1National Ocean Sciences AMS Facility, Department of Geology and Geophysics, Woods Hole Oceanographic
Institution, Woods Hole, MA 02543, USA.
2Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany.
Abstract: The National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility at Woods Hole
Oceanographic Institution is constructing a system for the analysis of 14C in a continuously flowing stream of
sample gas. A key component of the system will be a gas-accepting microwave-plasma ion source first built at
Atomic Energy of Canada Limited, Chalk River, Ontario, Canada and further developed at NOSAMS. The
source uses 2.45 GHz microwaves and a continuously flowing mixture of Argon and Carbon Dioxide to sustain
a plasma. Positive ions are extracted from the source and converted to negative ions by passage through a
magnesium-vapor charge-exchange canal located at the exit of the ion source.
|
Full Paper (pdf)