A high output, large acceptance injector for the NOSAMS Tandetron AMS system

TitleA high output, large acceptance injector for the NOSAMS Tandetron AMS system
Publication TypeJournal Article
Year of Publication2015
AuthorsLongworth, BE, von Reden, KF, Long, P, Roberts, ML
JournalNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume361
Pagination211-216
Date PublishedOct 15
ISSN0168-583X
Accession NumberWOS:000363345900041
Abstract

We have completed a major upgrade of the National Ocean Sciences AMS Facility (NOSAMS) Tandetron AMS system in two stages. First, the simultaneous (recombinator) injector was replaced with a fast-cycling sequential injector and changes to the low-energy acceleration section. Data after the injector commissioning show an improvement in background, with mean machine background (commercial graphite) of Fm 0.0004 (62 ka). Second, we replaced the original ion source with a high-output 40 sample MCSNICS source. This improved beam currents and raw ratio fractionation, and increased sample to detection efficiency fivefold.

DOI10.1016/j.nimb.2015.04.005