Speaker
Description
Positive-ion mass spectrometry (PIMS) is a positive-to-negative ion conversion metrology instead of traditional accelerator mass spectrometry (AMS) on high-precision radiocarbon dating. To demonstrate the probability of PIMS with a 2.45 GHz ECR ion source, an experiment was launched at Peking University (PKU). A compact permanent magnet 2.45 GHz ECR ion source is designed to produce carbon ions from CO2. A CXC unit was installed after the extraction system and ethylene is chosen as charge exchange gas. A dipole is employed for beam analysis. A faraday cup installed at the end of the beamline is used for beam current measurement. Preliminary experiments prove that more than hundreds of microamp of C2+ beam can be produced with this ECR source. By injecting ethylene into CXC, several microamp C- beam was detected and the C2+ ions charge exchange efficiency to C- ions can reach to 5%.
| E-mail for contact person | sxpeng@pku.edu.cn |
|---|---|
| Funding Information | NSFC 11975036, 11775007 |
