Electromagnetic field modeling and ion optics calculations for a continuous-flow AMS system

TitleElectromagnetic field modeling and ion optics calculations for a continuous-flow AMS system
Publication TypeJournal Article
Year of Publication2007
AuthorsHan, BX, von Reden, KF, Roberts, ML, Schneider, RJ, Hayes, JM, Jenkins, WJ
JournalNuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
Volume259
Issue1
Pagination111-117
ISSN0168-583X
Abstract

A continuous-flow C-14 AMS (CFAMS) system is under construction at the NOSAMS facility. This system is based on a NEC Model 1.5SDH-10.5 MV Pelletron accelerator and will utilize a combination of a microwave ion source (MIS) and a charge exchange canal (CXC) to produce negative carbon ions from a continuously flowing stream Of CO2 gas. For high-efficiency transmission of the large emittance, large energy-spread beam from the ion source unit, a large-acceptance and energy-achromatic injector consisting of a 45 degrees electrostatic spherical analyzer (ESA) and a 90 degrees double-focusing magnet has been designed. The 45 degrees ESA is rotatable to accommodate a 134-sample MC-SNICS as a second ion source. The high-energy achromat (90 degrees double focusing magnet and 90 degrees ESA) has also been customized for large acceptance. Electromagnetic field modeling and ion optics calculations of the beamline were done with Infolytica MagNet, ElecNet, and Trajectory Evaluator. PBGUNS and SIMION were used for the modeling of ion source unit. (c) 2007 Elsevier B.V. All rights reserved.

DOI10.1016/J.Nimb.2007.01.224