A magnesium vapor charge-exchange target for an accelerator mass spectrometer

2009 ◽  
Vol 52 (2) ◽  
pp. 245-248 ◽  
Author(s):  
V. F. Klyuev ◽  
V. V. Parkhomchuk ◽  
S. A. Rastigeev
Keyword(s):  
Charge Exchange ◽  
Mass Spectrometer ◽  
Magnesium Vapor ◽  
Accelerator Mass Spectrometer

scholarly journals 14C AMS at Suerc: Improving QA Data with the 5MV Tandem and 250KV SSAMS

Radiocarbon ◽  
2010 ◽  
Vol 52 (2) ◽  
pp. 263-271 ◽  
Author(s):  
P Naysmith ◽  
G T Cook ◽  
S P H T Freeman ◽  
E M Scott ◽  
R Anderson ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Sample Preparation ◽  
Mass Spectrometer ◽  
Random Access ◽  
Capacity Measurement ◽  
Tandem Accelerator ◽  
Standard Data ◽  
Accelerator Mass Spectrometer ◽  
On Line ◽  
Automated Data Acquisition

In 2003, a National Electrostatics Corporation (NEC) 5MV tandem accelerator mass spectrometer was installed at SUERC, providing the radiocarbon laboratory with 14C measurements to 4–5‰ repeatability. In 2007, a 250kV single-stage accelerator mass spectrometer (SSAMS) was added to provide additional 14C capability and is now the preferred system for 14C analysis. Changes to the technology and to our operations are evident in our copious quality assurance data: typically, we now use the 134-position MC-SNICS source, which is filled to capacity. Measurement of standards shows that spectrometer running without the complication of on-line δ13C evaluation is a good operational compromise. Currently, 3‰ 14C/13C measurements are routinely achieved for samples up to nearly 3 half-lives old by consistent sample preparation and an automated data acquisition algorithm with sample random access for measurement repeats. Background and known-age standard data are presented for the period 2003–2008 for the 5MV system and 2007–2008 for the SSAMS, to demonstrate the improvements in data quality.

scholarly journals Operation experience of the BINP accelerator mass spectrometer

2018 ◽  
Author(s):  
S. Rastigeev ◽  
A. Frolov ◽  
A. Goncharov ◽  
V. Klyuev ◽  
E. Konstantinov ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Accelerator Mass Spectrometer

scholarly journals Titan's exosphere and its interaction with Saturn's magnetosphere

2008 ◽  
Vol 367 (1889) ◽  
pp. 743-752 ◽  
Author(s):  
Iannis Dandouras ◽  
Philippe Garnier ◽  
Donald G Mitchell ◽  
Edmond C Roelof ◽  
Pontus C Brandt ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Remote Sensing ◽  
Charge Exchange ◽  
Mass Spectrometer ◽  
Upper Atmosphere ◽  
Neutral Atoms ◽  
Energetic Ions ◽  
Imaging Instrument ◽  
Singly Charged

Titan's nitrogen-rich atmosphere is directly bombarded by energetic ions, due to its lack of a significant intrinsic magnetic field. Singly charged energetic ions from Saturn's magnetosphere undergo charge-exchange collisions with neutral atoms in Titan's upper atmosphere, or exosphere, being transformed into energetic neutral atoms (ENAs). The ion and neutral camera, one of the three sensors that comprise the magnetosphere imaging instrument (MIMI) on the Cassini/Huygens mission to Saturn and Titan, images these ENAs like photons, and measures their fluxes and energies. These remote-sensing measurements, combined with the in situ measurements performed in the upper thermosphere and in the exosphere by the ion and neutral mass spectrometer instrument, provide a powerful diagnostic of Titan's exosphere and its interaction with the Kronian magnetosphere. These observations are analysed and some of the exospheric features they reveal are modelled.

Accelerator mass spectrometer with ion selection in high-voltage terminal

2016 ◽  
Vol 13 (7) ◽  
pp. 923-926 ◽  
Author(s):  
S. A. Rastigeev ◽  
A. D. Goncharov ◽  
V. F. Klyuev ◽  
E. S. Konstantinov ◽  
L. A. Kutnyakova ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
High Voltage ◽  
Accelerator Mass Spectrometer

scholarly journals The New National Ocean Sciences Accelerator Mass Spectrometer Facility at Woods Hole Oceanographic Institution: Progress and First Results

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 478-482 ◽  
Author(s):  
K. F. Von Reden ◽  
G. A. Jones ◽  
R. J. Schneider ◽  
A. P. McNichol ◽  
G. J. Cohen ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Woods Hole Oceanographic Institution ◽  
Ocean Sciences ◽  
Start Up ◽  
Accelerator Mass Spectrometer ◽  
First Results ◽  
Injector Design

Start-up performance and first results of the new Woods Hole Accelerator Mass Spectrometer are discussed. Special attention is given to the hemispherical ionizer sputter source and the triple-isotope injector design.

scholarly journals A High Throughput 14C Accelerator Mass Spectrometer

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 458-467 ◽  
Author(s):  
Kenneth H. Purser
Keyword(s):  
Mass Spectrometer ◽  
Unique Feature ◽  
Isotopic Ratios ◽  
Tandem Accelerator ◽  
Ocean Sciences ◽  
Accelerator Mass Spectrometer ◽  
Recent Sample ◽  
Present Design ◽  
On Line ◽  
Differential Transmission

I present design details of a tandem accelerator mass spectrometer, which has been installed at the National Ocean Sciences AMS Facility at Woods Hole, Massachusetts, to provide precision 14C/13C/12C isotopic ratios for sub-milligram-size samples of graphite with throughputs of >4000 samples per year. A unique feature is the capability for simultaneous measurement of all three isotopes after acceleration, to avoid differential transmission effects and to allow on-line fractionation corrections and diagnosis of instrument health. Using filamentous graphite fabricated from a recent sample, we have established the counting rate of 14C ions at between 60–120 s–1.

scholarly journals Isotope-Ratio and Background Corrections for Accelerator Mass Spectrometry Radiocarbon Measurements

Radiocarbon ◽  
1990 ◽  
Vol 32 (2) ◽  
pp. 135-142 ◽  
Author(s):  
D J Donahue ◽  
T W Linick ◽  
A J T Jull
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometer ◽  
Accelerator Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Ratios ◽  
Sample Contamination ◽  
Accelerator Mass Spectrometer

We present here the method we use to convert to radiocarbon ages (14C/13C) ratios measured in the Arizona Accelerator Mass Spectrometer facility. We describe the procedures we use to convert sample and standard isotope ratios to values appropriate for calculation of radiocarbon ages. We also discuss, in some detail, corrections to account for sample contamination.

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