A marginal oscillator detector for ion cyclotron resonance spectrometers
- 1 July 1974
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 45 (7), 929-935
- https://doi.org/10.1063/1.1686771
Abstract
Design, construction, and performance of a solid state marginal oscillator for detection of ions in ion cyclotron resonanceexperiments are described. Special design features include noise matching a high Q tank to an FET preamplifier which sacrifices voltage level for improved S/N ratio, amplitude limiting to remove noise from the feedback signal, and impedance matching the feedback resistor to the tank to minimize phase shift, parasitic capacitive coupling, and tank loading. A simple electrical circuit which simulates power absorption by ions for performance testing and comparison among marginal oscillators for icr applications is also described.Keywords
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