scholarly journals Ion Source Development at Kccams, University of California, Irvine

Radiocarbon ◽  
2004 ◽  
Vol 46 (1) ◽  
pp. 33-39 ◽  
Author(s):  
J R Southon ◽  
G M Santos
Keyword(s):  
Mass Spectrometry ◽  
Carbon Cycle ◽  
Accelerator Mass Spectrometry ◽  
Beam Current ◽  
Ion Source ◽  
University Of California ◽  
Current Output ◽  
Mass Spectrometry Facility ◽  
The University

The Keck Carbon Cycle accelerator mass spectrometry facility at the University of California, Irvine, operates a National Electronics Corporation 40-sample MC-SNICS ion source. We describe modifications that have increased beam current output, improved reliability, and made the source easier to service.

scholarly journals The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: Status Report

Radiocarbon ◽  
2010 ◽  
Vol 52 (2) ◽  
pp. 301-309 ◽  
Author(s):  
Robert K Beverly ◽  
Will Beaumont ◽  
Denis Tauz ◽  
Kaelyn M Ormsby ◽  
Karl F von Reden ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Carbon Cycle ◽  
Accelerator Mass Spectrometry ◽  
University Of California ◽  
Status Report ◽  
Sample Throughput ◽  
Laboratory Procedures ◽  
The University

We present a status report of the accelerator mass spectrometry (AMS) facility at the University of California, Irvine, USA. Recent spectrometer upgrades and repairs are discussed. Modifications to preparation laboratory procedures designed to improve sample throughput efficiency while maintaining precision of 2–3‰ for 1-mg samples (Santos et al. 2007c) are presented.

Can-AMS: The New Accelerator Mass Spectrometry Facility At The University Of Ottawa

2011 ◽  
Author(s):  
W. E. Kieser ◽  
X.-L. Zhao ◽  
I. D. Clark ◽  
T. Kotzer ◽  
A. E. Litherland ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Mass Spectrometry Facility ◽  
The University

scholarly journals The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: Initial Operation and a Background Surprise

Radiocarbon ◽  
2004 ◽  
Vol 46 (1) ◽  
pp. 41-49 ◽  
Author(s):  
John Southon ◽  
Guaciara Santos ◽  
Kevin Druffel-Rodriguez ◽  
Ellen Druffel ◽  
Sue Trumbore ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Carbon Cycle ◽  
Molecular Ions ◽  
Lessons Learned ◽  
University Of California ◽  
First Year ◽  
Initial Operation ◽  
Paper Briefly ◽  
Background Charge ◽  
The University

A new radiocarbon accelerator mass spectrometry (AMS) laboratory for carbon cycle studies has been established at the University of California, Irvine. The 0.5MV AMS system was installed in mid-2002 and has operated routinely since October of that year. This paper briefly describes the spectrometer and summarizes lessons learned during the first year of operation. In the process of setting up the system, we identified and largely suppressed a previously unreported 14C AMS background: charge exchange tails from 14N beams derived from nitrogen-containing molecular ions produced near the entrance of the accelerator.

scholarly journals Technological Advances in the University of Washington Accelerator Mass Spectrometry System

Radiocarbon ◽  
1983 ◽  
Vol 25 (2) ◽  
pp. 755-760 ◽  
Author(s):  
G W Farwell ◽  
P M Grootes ◽  
D D Leach ◽  
F H Schmidt
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Ion Source ◽  
The Past ◽  
Technological Advances ◽  
Recent Developments ◽  
Mass Spectrometry System ◽  
The University ◽  
Preparation Techniques ◽  
Accelerator System

During the past year we have continued to work toward greater stability and flexibility in nearly all elements of our accelerator mass spectrometry (AMS) system, which is based upon an FN tandem Van de Graaff accelerator, and have carried out measurements of 14C/12C and 10Be/9Be isotopic abundance ratios in natural samples. The principal recent developments and improvements in the accelerator system and in our sample preparation techniques for carbon and beryllium are discussed, and the results of a study of 10Be cross-contamination of beryllium samples in the sputter ion source are presented.

RADIOCARBON IN MEXICO: FROM PROPORTIONAL COUNTERS TO AMS

Radiocarbon ◽  
2021 ◽  
pp. 1-7
Author(s):  
Corina Solís ◽  
Efraín Chávez ◽  
Arcadio Huerta ◽  
María Esther Ortiz ◽  
Alberto Alcántara ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
High Voltage ◽  
Accelerator Mass Spectrometry ◽  
Science And Technology ◽  
National Council ◽  
University Of Arizona ◽  
Technological Developments ◽  
High Voltage Engineering ◽  
The University

ABSTRACT Augusto Moreno is credited with establishing the first radiocarbon (14C) laboratory in Mexico in the 1950s, however, 14C measurement with the accelerator mass spectrometry (AMS) technique was not achieved in our country until 2003. Douglas Donahue from the University of Arizona, a pioneer in using AMS for 14C dating, participated in that experiment; then, the idea of establishing a 14C AMS laboratory evolved into a feasible project. This was finally reached in 2013, thanks to the technological developments in AMS and sample preparation with automated equipment, and the backing and support of the National Autonomous University of Mexico and the National Council for Science and Technology. The Mexican AMS Laboratory, LEMA, with a compact 1 MV system from High Voltage Engineering Europa, and its sample preparation laboratories with IonPlus automated graphitization equipment, is now a reality.

Isobar suppression for 36Cl accelerator mass spectrometry at the University of Tsukuba

2019 ◽  
Vol 438 ◽  
pp. 131-135 ◽  
Author(s):  
Seiji Hosoya ◽  
Kimikazu Sasa ◽  
Tsutomu Takahashi ◽  
Tetsuya Matsunaka ◽  
Masumi Matsumura ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
The University

scholarly journals Progress at the Seoul National University AMS Facility

Radiocarbon ◽  
2001 ◽  
Vol 43 (2A) ◽  
pp. 163-167 ◽  
Author(s):  
J C Kim ◽  
J H Park ◽  
I C Kim ◽  
C Lee ◽  
M K Cheoun ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Performance Test ◽  
Conventional Technique ◽  
National University ◽  
Mass Spectrometry Facility ◽  
Seoul National University ◽  
Accelerator System

The accelerator mass spectrometry facility at the Seoul National University (SNU-AMS) was completed in December 1998 and a report was presented at the Vienna AMS conference in September 1999. At the conference, we described the basic components of our accelerator system and reported the results of the performance test. Since then, extensive testing of the accuracy and reproducibility of the system has been carried out, and about 200 unknown samples have been measured so far. We obtained a precision of 4‰ for modern samples, and an accuracy of approximately 40 yr was demonstrated by analyzing samples that were previously dated with a conventional technique and by other AMS laboratories. We present these results here, together with detailed descriptions of our data-taking and analysis procedures.

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