Hold-up and memory effect for carbon in a compact microwave ion source

TitleHold-up and memory effect for carbon in a compact microwave ion source
Publication TypeJournal Article
Year of Publication1997
AuthorsSchneider, RJ, vonReden, KF, Wills, JSC, Diamond, WT, Lewis, R, Savard, G, Schmeing, H
JournalNuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
Date PublishedMar
Accession NumberWOS:A1997WT65300105

The production of C+ in a microwave ion source injected with a gaseous CO2 sample has been investigated as an alternative to sample graphitization, A continuous flow of argon gas maintained the discharge, and 20 mu L Of CO2 gas at approximately 1 atm was pulsed into the source through a sample valve closely coupled to the plasma chamber, The C+ component of the beam fell to 1% of its original intensity less than 10 s after the valve was operated. in a separate experiment, the microwave ion source was operated with pure CO2 feed gas and the extracted beam was magnetically analyzed. Efficient breakup of the molecules was observed. These results are considered promising for such applications as accelerator mass spectrometry of C isotopes in gaseous samples.