Title | Improved C− efficiency and ion beam currents by modifying SNICS cathode material |
Publication Type | Journal Article |
Year of Publication | 2019 |
Authors | Hlavenka JD, Abrams H, Roberts ML, Longworth BE, Fallon S |
Journal | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
Volume | 439 |
Pagination | 90 - 93 |
Date Published | Jan-01-2019 |
ISSN | 0168583X |
Keywords | Cathode, Efficiency, Ion source, SNICS |
Abstract | We investigated the possibility of increasing the C-14 AMS efficiency and maximizing C- beam currents by modifying sample cathode geometry and material. Previously, we reported results which showed an increase in C- beam current and improved ionization efficiency when reducing the cathode sample well diameter from 1 mm to 0.75 mm and using zinc inserts, pressed into the aluminum cathode holder [4]. In this study we expand that effort by using cathodes with inserts made of Fe, Mo, Ni, Ti, Cu, and Zn. We pressed cathodes with 100 mu g of Oxalic Acid I (OX-I) and ran them to exhaustion. C-12 beam currents, C-14 counts, and graphite weight were used to determine ion source efficiency. |
URL | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000455693100015 |
DOI | 10.1016/j.nimb.2018.11.015 |