Zobrazeno 1 - 10
of 487
pro vyhledávání: '"Photoacoustic cell"'
Publikováno v:
Photoacoustics, Vol 38, Iss , Pp 100612- (2024)
A miniaturized photoacoustic spectroscopy-based gas sensor is proposed for the purpose of detecting sub-ppm-level carbonyl sulfide (OCS) using a tunable mid-infrared interband cascade laser (ICL) and a Helmholtz photoacoustic cell. The tuning charact
Externí odkaz:
https://doaj.org/article/d1cb83fc9589409281bf58600b0324c4
Autor:
Zhengang Li, Jiaxiang Liu, Zhiqiang Ning, Haichun Xu, Junfang Miao, Ying Pan, Changping Yang, Yonghua Fang
Publikováno v:
Photoacoustics, Vol 36, Iss , Pp 100591- (2024)
Atmospheric aerosols play a pivotal role in the earth-atmospheric system. Analyzing their optical properties, specifically absorption and scattering coefficients, is essential for comprehending the impact of aerosols on climate. When different optica
Externí odkaz:
https://doaj.org/article/ef550b175df2430fb8ae1f12305a6a7e
Autor:
Chaofan Feng, Xiaowen Shen, Biao Li, Xiaoli Liu, Yujing Jing, Qi Huang, Pietro Patimisco, Vincenzo Spagnolo, Lei Dong, Hongpeng Wu
Publikováno v:
Photoacoustics, Vol 36, Iss , Pp 100585- (2024)
We report on a photoacoustic sensor system based on a differential photoacoustic cell to detect the concentration of CO impurities in hydrogen. A DFB-QCL laser with a central wavelength of 4.61 µm was employed as an exciting source with an optical p
Externí odkaz:
https://doaj.org/article/4bf8a3234bd54a33b9781bbbf2eb654c
Publikováno v:
Photoacoustics, Vol 35, Iss , Pp 100583- (2024)
A high sensitivity and ultra-low concentration range photoacoustic spectroscopy (PAS) gas detection system, which was based on a novel trapezoid compound ellipsoid resonant photoacoustic cell (TCER-PAC) and partial least square (PLS), was proposed to
Externí odkaz:
https://doaj.org/article/cae2dd58c30b41d0b59158b55f8465d2
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
A photoacoustic module based on a novel 273 nm deep-ultraviolet light-emitting diode (DUV-LED) was developed for sulfur dioxide (SO2) detection. The DUV-LED with an emission angle of 60° emitted a power of 10 mW. A high-sensitivity non-resonant phot
Externí odkaz:
https://doaj.org/article/5c3e078f52024db99683f1022daf4e5d
Autor:
Lujun Fu, Ping Lu, Yufeng Pan, Yi Zhong, Chaotan Sima, Qiang Wu, Jiangshan Zhang, Lingzhi Cui, Deming Liu
Publikováno v:
Photoacoustics, Vol 34, Iss , Pp 100571- (2023)
An all-optical non-resonant photoacoustic spectroscopy system for multicomponent gas detection based on a silicon cantilever optical microphone (SCOM) and an aseismic photoacoustic cell is proposed and demonstrated. The SCOM has a high sensitivity of
Externí odkaz:
https://doaj.org/article/a2989108e1574a169fe58d02e28ad318
Publikováno v:
Photoacoustics, Vol 32, Iss , Pp 100526- (2023)
In this paper, we propose and experimentally demonstrate a symmetric multi-resonant cavity photoacoustic cell (MR-PAC) with dual microphones detection, based on multi-resonator photoacoustic spectroscopy (MR-PAS). The designed photoacoustic cell cont
Externí odkaz:
https://doaj.org/article/3e60f40b07884726ac2eecfc8c7fc16c
Autor:
Le Zhang, Lixian Liu, Xueshi Zhang, Xukun Yin, Huiting Huan, Huanyu Liu, Xiaoming Zhao, Yufei Ma, Xiaopeng Shao
Publikováno v:
Photoacoustics, Vol 31, Iss , Pp 100492- (2023)
Enhancing multi-gas detectability using photoacoustic spectroscopy capable of simultaneous detection, highly selectivity and less cross-interference is essential for dissolved gas sensing application. A T-type photoacoustic cell was designed and veri
Externí odkaz:
https://doaj.org/article/8c01c88faed64b1f96184b7e439be0ac
Publikováno v:
Photoacoustics, Vol 30, Iss , Pp 100475- (2023)
Photoacoustic cells play an important role in photoacoustic trace gas analysis, as they can amplify the photoacoustic signal and improve detection limit. Therefore, the structure and dimensional design of a photoacoustic cell are very important for t
Externí odkaz:
https://doaj.org/article/ece7581701a945f6841a1d5df9c44a91
Publikováno v:
Photoacoustics, Vol 30, Iss , Pp 100467- (2023)
In this paper, a highly sensitive photoacoustic spectroscopy (PAS) sensor based on retro-reflection-cavity-enhanced differential photoacoustic cell (DPAC) is demonstrated for the first time. Acetylene (C2H2) was selected as the analyte. The DPAC was
Externí odkaz:
https://doaj.org/article/04bc30d1a2734fae994bf348ea7c3fbd