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b. Recombinator Injector » Next to c.
Ions extracted with a 40,000 Volt electric field, move from the source (a) at a speed of more than 450 miles per second inside of a vacuum beam line to the left, then into an assembly of four magnets and two electrostatic lenses. This device is called a "recombinator injector" because it serves to separate the negative ions by mass and remove ions with masses outside of the range of the carbon isotopes (A = 12 - 14 atomic mass units) before recombining the now mostly pure negative carbon ions for injection into the next stage, the accelerator.