Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Olav Werhahn"'
Publikováno v:
Applied Sciences, Vol 11, Iss 11, p 5190 (2021)
We determine the CO2, N2, Ar, O2 and air pressure broadening coefficients of the H35Cl P(5) absorption line at 2775.77 cm−1 in the fundamental (1←0) band using a newly developed direct tunable diode laser absorption spectroscopy (dTDLAS)-based sp
Externí odkaz:
https://doaj.org/article/83f8260413db482196859531118c2a27
Publikováno v:
Applied Sciences, Vol 11, Iss 12, p 5341 (2021)
We report self- and air collisional broadening coefficients for the H2O line at 7299.43 cm−1 and corresponding temperature coefficients for a temperature range spanning 293–573 K. New laser spectroscopic setups specifically designed for this purp
Externí odkaz:
https://doaj.org/article/a8fff073d9d44373a9b142afb5a16732
Publikováno v:
Applied Sciences, Vol 11, Iss 12, p 5361 (2021)
We report a direct tunable diode laser absorption spectroscopy (dTDLAS) instrument developed for NO2 concentration measurements without chemical pre-conversion, operated as an Optical Gas Standard (OGS). An OGS is a dTDLAS instrument that can deliver
Externí odkaz:
https://doaj.org/article/c799cef18793494abbc5fea69334ac9c
Publikováno v:
Flow, Turbulence and Combustion. 106:533-546
This work presents a mid-IR direct tunable diode laser absorption spectroscopy (dTDLAS)-based HCl spectrometer, which is specially designed and optimized to measure HCl concentration in combustion exhaust gas matrices (i.e. elevated gas temperatures,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::569b0fef1de6c1c3f8ef54ba1f771a13
https://doi.org/10.1007/s10494-020-00216-z
https://doi.org/10.1007/s10494-020-00216-z
Autor:
Jan C. Petersen, Olav Werhahn
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
Laser spectroscopy providing direct SI-traceable amount fraction, realized by Optical Gas Standards, complement gaseous reference materials. The method needs to be propagated into calibration and measurement capabilities. This paper highlights anchor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1b03874457f4d7ef6bf21486550e1fe
https://doi.org/10.1364/lacsea.2022.lth5e.2
https://doi.org/10.1364/lacsea.2022.lth5e.2
Autor:
Andrew S Brown, Paul Quincey, Volker Ebert, Andreas Nowak, Jordan T Tompkins, Isabel Hessey, Krzysztof Ciupek, Carlo Schaefer, Olav Werhahn, Konstantina Vasilatou, Felix Lüönd, Tatiana Macé, François Gaie-Levrel, Lola Bregonzio-Rozier, Narine Oganyan, Dmitrii Belenkii, Hiromu Sakurai, Yoshiko Murashima, Junjie Liu, Jinsang Jung, Stefan Seeger
Publikováno v:
Metrologia. 60:08014
Main text This report presents the results of CCQM-K150, a key comparison between nine National Measurement Institutes (NMIs) which tested the capability of the NMIs to measure particle number concentration (in the range of 100 to 20 000 cm-3) using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7814fb0a2c39ac2b662dd03a688230b7
https://doi.org/10.1088/0026-1394/60/1a/08014
https://doi.org/10.1088/0026-1394/60/1a/08014
Autor:
Andrew S Brown, Paul Quincey, Volker Ebert, Andreas Nowak, Jordan T Tompkins, Isabel Hessey, Krzysztof Ciupek, Carlo Schaefer, Olav Werhahn, Konstantina Vasilatou, Felix Lüönd, Tatiana Macé, François Gaie-Levrel, Lola Bregonzio-Rozier, Narine Oganyan, Dmitrii Belenkii, Hiromu Sakurai, Yoshiko Murashima, Junjie Liu, Jinsang Jung, Stefan Seeger, Alfred Wiedensohler, Thomas Tuch, Maik Merkel, Kay Weinhold
Publikováno v:
Metrologia. 60:08015
Main text This report presents the results of CCQM-P189, a pilot comparison between 10 laboratories which tested the participants’ capability to measure particle number concentration (in the range of 100 to 20 000 cm-3) using condensation particle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e9057c37fd548c8e0524416f7938505
https://doi.org/10.1088/0026-1394/60/1a/08015
https://doi.org/10.1088/0026-1394/60/1a/08015
Autor:
Olav Werhahn, Lukas Flierl, Olaf Rienitz, Jelka Braden-Behrens, Javis A. Nwaboh, Volker Ebert
The emission of greenhouse gases and the resulting global warming is one of the most important and challenging issues of the 21st century. Carbon dioxide is one of the major contributors to the greenhouse effect and its atmospheric abundance has gro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3241334aa089314c134b50c7c89e5f86
https://doi.org/10.5194/egusphere-egu21-16568
https://doi.org/10.5194/egusphere-egu21-16568
Autor:
Javis A. Nwaboh, Jiawen Liu, Arnaud Papin, Olav Werhahn, Jianrong Li, Heleen Meuzelaar, Nicolas Chatellier, Zhechao Qu, Stefan Persijn, Adriaan M H van der Veen, Volker Ebert
Publikováno v:
Analyst
Analyst, Royal Society of Chemistry, 2021, 146 (4), pp.1402-1413. ⟨10.1039/D0AN01955K⟩
Analyst, Royal Society of Chemistry, 2021, 146 (4), pp.1402-1413. ⟨10.1039/D0AN01955K⟩
International audience; Biomethane is a renewable energy gas with great potential to contribute to the diversification and greening of the natural gas supply. Ideally, biomethane can directly be injected into the natural gas grid system. For grid inj
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0f184946c8c8346c668c5d609f3a1cd
http://hdl.handle.net/20.500.12278/31691
http://hdl.handle.net/20.500.12278/31691
Autor:
Olav Werhahn, Stefan Persijn, Heleen Meuzelaar, Javis A. Nwaboh, Pharahilda M. Steur, Kerstin Zeyer, Francesca Rolle, Michela Sega, Lars Wacker, Jelka Braden-Behrens, Joachim Mohn, Volker Ebert
Publikováno v:
Scopus-Elsevier
Isotope ratio measurements and scale definitions are typically related to mass specectroscopy. This work discusses the challenges of optical isotope ratio spectroscopy and its prospects to significantly complement isotope ratio mass spectrometry.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1e7d23c168627294b4eaa06eb68891b
https://doi.org/10.1364/es.2021.ew5d.2
https://doi.org/10.1364/es.2021.ew5d.2