In blongworth/HybridGIS: Data, Functions, and Analysis for the NOSAMS Hybrid Gas Ion Source

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National Ocean Sciences AMS Facility, Woods Hole Oceanographic Institution, Woods Hole, MA, USA

We are using a hybrid gas-sputter ion source to produce carbon ions from CO~2~ gas for measurement of ^14/12^C via accelerator mass spectrometry. In our source, CO~2~ is introduced onto a titanium surface within a cathode sputtered by cesium ions, dissociating CO~2~ and ionizing some of the carbon for extraction as in a solid sputter source. We are working to optimize ionization and develop interfaces that produce CO~2~ from samples and introduce it to the source. Early tests with CO~2~ standard gas gave way to introduction of CO~2~ diluted with helium carrier in a closed system, and most recent work introduces a CO~2~/He mixture to the source via an open split. Current development focuses on producing CO~2~ from carbonates (CaCO~3~) which is delivered to the open split and ion source using a flow of helium carrier gas. We will discuss efficiency, background carbon current, precision, and accuracy of the method.

blongworth/HybridGIS documentation built on Dec. 19, 2021, 10:41 a.m.