Design and Test of a Duoplasmatron for Beam Extraction with a Carbon Dioxide Gas

The demand for radiocarbon dating using the accelerator mass spectrometer (AMS) is rapidly increasing. Accordingly, a system to inject gaseous samples directly into an ion source in order to measure isotopic ratios by using an Ams system is proposed. With ion beam extraction via direct injection of a gas into the ion source, the preparation of the gaseous sample and the graphitization process can be simplified using a gas ion source. A duoplasmatron was designed and installed in an ion source test stand to perform ion beam extraction using carbon dioxide. The ion source can adjust its geometry for the magnetic field distribution, which can be meet to optimize the beam properties to stratify the design criteria in this test stand. The ion beam extraction test results are presented in this paper.