Proof of concept for an optogalvanic gas sensor for NO based on Rydberg excitations
Atomic Physics
2018-07-13 v3 Applied Physics
Abstract
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.
Cite
@article{arxiv.1801.09453,
title = {Proof of concept for an optogalvanic gas sensor for NO based on Rydberg excitations},
author = {Johannes Schmidt and Markus Fiedler and Ralf Albrecht and Denis Djekic and Patrick Schalberger and Holger Baur and Robert Löw and Norbert Fruehauf and Tilman Pfau and Jens Anders and Edward R. Grant and Harald Kübler},
journal= {arXiv preprint arXiv:1801.09453},
year = {2018}
}