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The AMS Instruments

NOSAMS tandetron AMS system

The first NOSAMS accelerator was installed in 1989 and commissioned in 1992 at the Woods Hole Oceanographic Institution in Massachusetts. Accelerator mass spectrometry, or AMS, is a method of radiocarbon analysis where atoms of 14C contained in a sample are directly counted.

The system is over 9 meters long and consists of a 2.5 million volt tandem (two-stage) accelerator, sandwiched between a low-energy mass spectrometer to the left and a high-energy mass spectrometer to the right. It was originally configured with a GIC-860 ion source and a recombinator injector, but was upgraded in 2014 with a NEC MCSNICS ion source and a sequential or "bounced" injection system.

Continuous-Flow AMS System (CFAMS)

The second CFAMS instrument was built and commissioned in 2006-2007. It is constructed around a 500kV compact pelletron accelerator. A bounced injection system with a modified SNICS solid sputter ion source as well as a microwave gas ion source are drawn on the left, and the high energy mass spectrometer and particle detection system is on the right.

Plan view of the continuous flow AMS (CFAMS) system.