A high-intensity cesium sputter negative ion source has been designed for Accelerator Mass Spectrometry (AMS). The source was developed for use in high-precision AMS as well as high-throughput AMS, with cathode change times of 2 seconds and typical beam current rise times of 3 seconds. The 134 MC-SNICS holds 134 samples in vacuum at one time. A wheel change and resumption of data acquisition takes 45 minutes or less. Wheel change is convenient and rapid. Mass analyzed 12C currents of over 100 μA are typical. The 134 MC-SNICS source has been delivered with a 5 MV Pelletron AMS System to CBAMS, Ltd., York, England, and acceptance tests have been completed. AMS performance data follows a description of the source.

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