Quartz Enhanced Photoacoustic Spectroscopy Based Gas Sensor with a Custom Quartz Tuning Fork

Proceedings

Melkonian, Jean-Michel¹  Duquesnoy, Maxime²  Aoust, Guillaume³  Lévy, Raphaël⁴ 

[1] Author to whom correspondence should be addressed.;DPHY, ONERA, Université Paris Saclay, F-91123 Palaiseau, France;Mirsense, Nanno-INNOV, building 863, 8 Avenue de la Vauve, 91120 Palaiseau, France;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.Published: 10

关键词: photoacoustic;    QEPAS;    spectroscopy;   

DOI  :  10.3390/proceedings2130735

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

We have fabricated a custom quartz tuning fork (QTF) with a reduced fundamental frequency, a larger gap between the prongs and the best quality factor in air at atmospheric conditions ever reported. Acoustic microresonators have been added to the QTF, these were optimized through experiments. We demonstrate a normalized noise equivalent absorption of 3.7 × 10−9 W·cm−1·Hz−1/2 for CO2 detection at atmospheric pressure. Influence of the inner diameter and length of the microresonators has been studied as well as the penetration depth between the QTF prongs.

【 授权许可】

CC BY