accelerator mass spectrometer

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Figure 8: Schematic diagram showing the ion trajectories in an accelerator mass spectrometer with application to 10Be. Negative ions of BeO leave the source and are mass analyzed with 10BeO− directed into the accelerator and 9BeO− into a Faraday cup. The molecular ions are broken up by gas and a thin carbon foil in the high-voltage terminal with much of the 10Be ionized to the 3+ charge state. The emerging ions pass through a velocity selector, are again analyzed for mass, and pass to the detector. Velocity selection is attained by a magnetic field and an electric field that are orthogonal to one another and to the beam direction; they are adjusted so that no deflection takes place for ions of the desired velocity.

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Figure 8: Schematic diagram showing the ion trajectories in an accelerator mass spectrometer with application to 10Be. Negative ions of BeO leave the source and are mass analyzed with 10BeO− directed into the accelerator and 9BeO− into a Faraday cup. The molecular ions are broken up by gas and a thin carbon foil in the high-voltage terminal with much of the 10Be ionized to the 3+ charge state. The emerging ions pass through a velocity selector, are again analyzed for mass, and pass to the detector. Velocity selection is attained by a magnetic field and an electric field that are orthogonal to one another and to the beam direction; they are adjusted so that no deflection takes place for ions of the desired velocity.

Figure 8: Schematic diagram showing the ion trajectories in an accelerator mass...

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