Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Ari Olafsson"'
Autor:
Ari Olafsson, Jes Henningsen
Publikováno v:
Physica Scripta. :94-99
Several systems are described which illustrate the use of spectroscopic techniques for environmental monitoring, and results are presented for field qualified NH3 monitors, based on CO2 lasers and on near infrared diode lasers. The feasibility of iso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f8b96988130efaaef8d25745a7a6ad1
https://doi.org/10.1088/0031-8949/1995/t58/011
https://doi.org/10.1088/0031-8949/1995/t58/011
Autor:
Jes Henningsen, Ari Olafsson
Publikováno v:
Infrared Physics & Technology. 36:309-319
Although early publications on the CO 2 waveguide laser reported tuning ranges close to and exceeding 1 GHz in individual laser lines, this potential has not been widely exploited for spectroscopy. In this paper we outline the difficulties which have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b83762ffaa0c95c85dfab2d8e6edda9
https://doi.org/10.1016/1350-4495(94)00075-v
https://doi.org/10.1016/1350-4495(94)00075-v
Publikováno v:
Chemical Physics. 163:173-178
Kinetic cooling is studied through photoacoustic CO 2 laser monitoring on gas mixtures containing CO 2 in quantities typical of smoke. The photoacoustic response is recorded in the time domain as well as in the frequency domain, and results are given
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51eb96001bdc1dcc0531ed1fae898c98
https://doi.org/10.1016/0301-0104(92)87101-e
https://doi.org/10.1016/0301-0104(92)87101-e
Publikováno v:
Journal of Molecular Spectroscopy. 152:420-433
Photoacoustic absorption signatures have been obtained for ozone in 450-MHz tuning windows of a waveguide CO 2 laser. Out of 42 observed absorption lines, 31 are assigned to the ν 1 and the ν 3 bands, and 7 to various hot bands of 16 O 16 O 16 O. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1c687608d476291e5b42d7a5b734374
https://doi.org/10.1016/0022-2852(92)90079-4
https://doi.org/10.1016/0022-2852(92)90079-4
Publikováno v:
Applied Physics B Photophysics and Laser Chemistry. 51:272-284
The mode structure of hollow dielectric waveguide lasers with free space sections and flat mirrors is studied theoretically and experimentally. The study covers the fundamental mode and the three most important higher order modes, and graphs are give
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::621b5d898a1ea9fe9af373e69e1e2cd5
https://doi.org/10.1007/bf00325048
https://doi.org/10.1007/bf00325048
Publikováno v:
Chemical Physics Letters, 337, 231-236
ResearcherID
ResearcherID
The cavity enhanced absorption (CEA) technique is extended into the 10 mum region using a line-tunable continuous wave CO2 laser. Part of the laser beam is deflected by an acousto-optical modulator (AOM), and is used to excite a mechanically unstable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5bb4308f29d166ac9319150da5966e7
https://doi.org/10.1016/s0009-2614(01)00217-2
https://doi.org/10.1016/s0009-2614(01)00217-2
Publikováno v:
Proceedings of the 10th international conference on photoacoustic and photothermal phenomena.
A new design of a multipass photoacoustic cell intended for FTIR measurements is reported. In spite of the intracell reflections the wall signal is negligible. Comparison with transmission measurements using a fundamental band of COS show a sensitivi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea829c497d0c1e63183e71469fd91ea2
https://doi.org/10.1063/1.58047
https://doi.org/10.1063/1.58047
Publikováno v:
Photoacoustic and Photothermal Phenomena III ISBN: 9783662138762
Photoacoustic Doppler limited spectra of mono-, tri- and perchloroethylene in windows around the CO2 laser frequencies are presented. Of these three molecules C2H3Cl alone exhibits well resolved line spectra. Measurements of pressure broadening for o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bfda20018af497626bab757b2ce65b6
https://doi.org/10.1007/978-3-540-47269-8_3
https://doi.org/10.1007/978-3-540-47269-8_3
Publikováno v:
SPIE Proceedings.
Ammonia monitoring is needed in most schemes for denitrification of power plant emission. In the PALAMON system we use a 500 MHz tunable, single mode, single line, CO2 laser as light source for a low pressure, high temperature, photoacoustic cell. Wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a499029fd010ecf2bd82cc3a4084e94
https://doi.org/10.1117/12.20340
https://doi.org/10.1117/12.20340
Publikováno v:
Applied Laser Spectroscopy ISBN: 9781468413441
The growing concern about our environment has led to a demand for methods and equipment which can perform a wide variety of monitoring tasks. The detection of specific molecules in the atmosphere may be motivated by the need for monitoring the emissi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66606ec890a11d06cda0d69dd6a60e16
https://doi.org/10.1007/978-1-4684-1342-7_32
https://doi.org/10.1007/978-1-4684-1342-7_32