TY - JOUR T1 - Plans for Expanded 14C Analyses at the NOSAMS Facility--a status and progress report. 9th International Conference on Accelerator Mass Spectrometry, Nagoya, Japan, 9/2002 JF - Nuclear Instruments and Methods in Physics Research Y1 - 2004 A1 - von Reden, K. A1 - Donoghue, J. A1 - Elder, K. A1 - Gagnon, A. A1 - Gerlach, D. A1 - Griffin, V. S. A1 - Healy, R. A1 - Long, P. A1 - McNichol, A. P. A1 - Percy, D. A1 - Roberts, M. L. A1 - Schneider, R. J. A1 - Xu, L. A1 - Hayes, J. VL - B 223-224 N1 - id: 1810 ER - TY - CONF T1 - Plans for expanded 14C analyses at the NOSAMS facility - a status and progress report T2 - International Conference on Accelerator Mass Spectrometry Y1 - 2002 A1 - von Reden, K. F. A1 - Donoghue, J. A1 - Elder, K. A1 - Gagnon, A. A1 - Gerlach, D. A1 - Griffin, V. A1 - Healy, R. A1 - Long, P. A1 - McNichol, A. A1 - Percy, D. A1 - Roberts, M. L. A1 - Schneider, R. J. A1 - Xu, L. A1 - Hayes, J. M. JF - International Conference on Accelerator Mass Spectrometry CY - Nagoya, Japan N1 - id: 1685 ER - TY - JOUR T1 - Installation of a 134-sample MC-SNICS ion source at NOSAMS and first results JF - Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms Y1 - 2000 A1 - von Reden, K. F. A1 - Bellino, M. A1 - Long, P. A1 - Schneider, R. J. A1 - Loger, R. KW - AMS KW - beam extraction/injection KW - C-14 KW - ion sources KW - ocean KW - pacific AB - In April 1999, the National Ocean Sciences AMS (NOSAMS) facility received the shipment of a 134-sample MC-SNICS ion source from the National Electrostatics Corporation (NEC). It replaced one of the two 59-sample spherical ionizer sources (US-AMS Model 3090A, HVEE Model 846). In this paper, we will describe the adaptation of the NEC ion source to the US-AMS/HVEE recombinator injector at NOSAMS. This is the first lime that the two leading sputter ion source designs are directly comparable on the same system. We will present ion beam optics calculations for both in comparison with measured results. Once fully operational, the new ion source will assume all of the sputter sample measurements at NOSAMS, while the remaining 59-sample source will be replaced by the newly developed microwave gas ion source. One of the most desirable features of the MC-SNICS design is the smaller cathode geometry. At comparable extracted currents, the surface diameter of the pressed samples is reduced from 1.5 to 1 mm. A new, automatic sample pressing procedure is being developed for this design. This will improve the capability for preparing and analyzing smaller sputter samples (carbon weight <100 g). Our US-AMS cathodes showed considerable reduction in the extracted currents when the sample diameter was reduced to 1 mm, even with samples of normal size (>200 mug C). (C) 2000 Elsevier Science B.V. All rights reserved. VL - 172 SN - 0168-583X N1 - 8th International Conference on Accelerator Mass SpectrometrySEP 06-10, 1999 VIENNA, AUSTRIA JO - Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms ER - TY - CONF T1 - High-precision Measurements of 14C as a Circulation Tracer in the Pacific, Indian, and Southern Oceans with Accelerator Mass Spectrometry (AMS) T2 - 8th International Conference on Heavy Ion Accelerator Technology Y1 - 1998 A1 - von Reden, K. F. A1 - Peden, J. C. A1 - Schneider, R. J. A1 - Bellino, M. A1 - Donoghue, J. A1 - Elder, K. L. A1 - Gagnon, A. R. A1 - Long, P. A1 - McNichol, A. P. A1 - Morin, T. A1 - Stuart, D. A1 - Hayes, J. M. A1 - Key, R. M. ED - Shepard, K. American Institute of Physics JF - 8th International Conference on Heavy Ion Accelerator Technology CY - Argonne National Lab N1 - id: 1636 ER - TY - JOUR T1 - Status Report of the National Ocean Sciences AMS Facility at Woods Hole Oceanographic Institution: Operations and Recent Developments JF - 15th International Conference on the Applications of Accelerators in Research and Industry Y1 - 1998 A1 - Bellino, M. A1 - von Reden, K. F. A1 - Schneider, R. J. A1 - Peden, J. C. A1 - Donoghue, J. A1 - Elder, K. L. A1 - Gagnon, A. R. A1 - Long, P. A1 - McNichol, A. P. A1 - Odegaard, A. P. A1 - Stuart, D. A1 - Handwork, S. A1 - Hayes, J. M. VL - A.I.P. Conference Proceedings IS - 475, part 2 N1 - id: 1647 ER -