Performance of the Nonmagnetic Radio-Frequency Mass Spectrometer Tube

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Abstract
The nonmagnetic radio-frequency principle of mass selection appears attractive because it promises to result in a mass spectrometer of simple construction and rugged nature. Accurate evaluation of the use of this principle is difficult because of the lack of published performance data. In an effort to obtain performance data a 5-stage Bennett-type tube with stage separation of 5–9-4–7 cycles has been constructed and operational variables studied theoretically and experimentally. The experimental results are encouraging. They indicate the tube is capable of sufficient stability, resolving power, and sensitivity to be used for many analytical and research problems. Electronic circuits required to achieve a reasonable stability are relatively simple.

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