Improved 26Al and 10Be cathode performance and data analysis at KIST

Authors
Eliades, John A.
Issue Date
2023-02
Publisher
Elsevier BV
Citation
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, v.535, pp.21 - 28
Abstract
Addition of a metal powder interface between solid metal cathode and sample powder was investigated for 26Al and 10Be analysis by accelerator mass spectrometry (AMS). Cathode quality and consistency improved, leading to more intense, stable and longer-lived ion beam currents, while cathode matrix sensitivity to powder fineness, homogeneity and precipitate to metal powder mixing ratios was reduced. Now, ratios of 1:0.75?2 for Al2O3 + Ag in Cu cathodes and 1:0.9?4 for BeO + Nb in Al or Cu cathodes are optimal. Furthermore, a survey of sputter energies showed that 5 keV?6 keV greatly increases cathode life, current stability, and cathode consumption efficiency for both BeO and Al2O3 as opposed to the widely used 7 keV for High Voltage Engineering SO110 ion sources. Finally, some data flagging criteria that have recently been incorporated into the 26Al and 10Be internal data analysis software are explained.
Keywords
AL-26; IONS; MECHANISM; MATRIX; Al-26; Be-10; Accelerator mass spectrometry; AMS; Cathode; Data quality; Ion current; Cs sputter energy
ISSN
0168-583X
URI
https://pubs.kist.re.kr/handle/201004/75827
DOI
10.1016/j.nimb.2022.11.018
Appears in Collections:
KIST Article > 2023
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