A Hybrid Vacuum Flange RF Oscillator for Low-Cost Mass Spectrometry.

ABSTRACT: In this communication we report the construction of a printed circuit board which mounts directly to the vacuum chamber of a mass spectrometer and produces the RF waveforms needed by many nonmass-selective devices such as ion guides and ion funnels. Our device is designed to replace a standard KF40 flange, can maintain vacuum chamber pressures of less than 10^-6 Torr, and contains the circuitry of the open-source Wisconsin Oscillator RF power supply to generate RF waveforms of 1-4 MHz and up to 200 V_p-p. In this iteration of the Wisconsin Oscillator, we also introduce a variable resistor to control the output RF amplitude and show that its ion transmission capabilities are identical to those provided by commercial RF power supplies. With this new implementation we have

SUBMITTER: Smith CG 

PROVIDER: S-EPMC11808759 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature