3 years ago

An optogalvanic gas sensor for nitric oxide based on Rydberg excitations.

Edward R. Grant, Norbert Fruehauf, Patrick Schalberger, Johannes Schmidt, Harald Kübler, Holger Baur, Tilman Pfau, Markus Fiedler, Denis Djekic, Jens Anders, Robert Löw, Ralf Albrecht

We demonstrate the applicability of 2-photon Rydberg excitations of nitric oxide (NO) at room temperature in a gas mixture with helium (He) as an optogalvanic gas sensor. The charges created initially from succeeding collisions of excited NO Rydberg molecules with free electrons are measured as a current on metallic electrodes inside a glass cell and amplified using a custom-designed highbandwidth transimpedance amplifier attached to the cell. We fnd that this gas sensing method is capable of detecting NO concentrations lower than 10 ppm even at atmospheric pressures, currently only limited by the way we prepare the gas dilutions.

Publisher URL: http://arxiv.org/abs/1801.09453

DOI: arXiv:1801.09453v1

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