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2. Coherent Backscattering of Light by Cold Atoms

Author

Labeyrie, G., de Tomasi, F., Bernard, J. -C., Mueller, C. A., Miniatura, C., and Kaiser, R.

Subjects
Physics - Atomic Physics, Condensed Matter - Disordered Systems and Neural Networks
Abstract

Light propagating in an optically thick sample experiences multiple scattering. It is now known that interferences alter this propagation, leading to an enhanced backscattering, a manifestation of weak localization of light in such diffuse samples. This phenomenon has been extensively studied with classical scatterers. In this letter we report the first experimental evidence for coherent backscattering of light in a laser-cooled gas of Rubidium atoms., Comment: 4 pages REVTEX, 1 page color image GIF, accepted for publication in Phys. Rev. Lett

Published
1999
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5. Lidar-Radiometer Inversion Code (LIRIC) for the Retrieval of Vertical Aerosol Properties from Combined Lidar Radiometer Data: Development and Distribution in EARLINET

Author

Chaikovsky, A, Dubovik, O, Holben, Brent N, Bril, A, Goloub, P, Tanre, D, Pappalardo, G, Wandinger, U, Chaikovskaya, L, Denisov, S, Grudo, Y, Lopatin, A, Karol, Y, Lapyonok, T, Amiridis, V, Ansmann, A, Apituley, A, Allados-Arboledas, L, Binietoglou, I, Boselli, A, D'Amico, G, Freudenthaler, V, Giles, David M, Granados-Munoz, M. J, Kokkalis, P, Nicolae, D, Oshchepkov, S, Papayannis, A, Perrone, M. R, Pietruczuk, A, Rocadenbosch, F, Sicard, M, Slutsker, Illya, Talianu, C, and De Tomasi, F

Subjects
General
Abstract

This paper presents a detailed description of LIRIC (LIdar-Radiometer Inversion Code)algorithm for simultaneous processing of coincident lidar and radiometric (sun photometric) observations for the retrieval of the aerosol concentration vertical profiles. As the lidar radiometric input data we use measurements from European Aerosol Re-search Lidar Network (EARLINET) lidars and collocated sun-photometers of Aerosol Robotic Network (AERONET). The LIRIC data processing provides sequential inversion of the combined lidar and radiometric data by the estimations of column-integrated aerosol parameters from radiometric measurements followed by the retrieval of height-dependent concentrations of fine and coarse aerosols from lidar signals using integrated column characteristics of aerosol layer as a priori constraints. The use of polarized lidar observations allows us to discriminate between spherical and non-spherical particles of the coarse aerosol mode. The LIRIC software package was implemented and tested at a number of EARLINET stations. Inter-comparison of the LIRIC-based aerosol retrievals was performed for the observations by seven EARLNET lidars in Leipzig, Germany on 25 May 2009. We found close agreement between the aerosol parameters derived from different lidars that supports high robustness of the LIRIC algorithm. The sensitivity of the retrieval results to the possible reduction of the available observation data is also discussed.

Published
2015
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11. EARLINET instrument intercomparison campaigns: Overview on strategy and results

Author

Wandinger, U. (author), Freudenthaler, V. (author), Baars, H. (author), Amodeo, A. (author), Engelmann, R. (author), Mattis, I. (author), Gross, S. (author), Pappalardo, G. (author), Giunta, G. (author), D'Amico, G. (author), Chaikovsky, A. (author), Osipenko, F. (author), Slesar, A. (author), Nicolae, D. (author), Belegante, L. (author), Talianu, C. (author), Serikov, I. (author), Linne, H. (author), Jansen, F. (author), Apituley, A. (author), Wilson, K.M. (author), de Graaf, M. (author), Trickl, T. (author), Giehl, H. (author), Adam, D. (author), Comeron, A. (author), Munoz-Porcar, C. (author), Rocadenbosch, F. (author), Sicard, M. (author), Tomas, S. (author), de Lange, D. (author), Kumar, D. (author), Pujadas, M. (author), Molero, F. (author), Fernandez, A.F. (author), Alados-Arboledas, L. (author), Bravo-Aranda, J.A. (author), Navas-Guzman, F. (author), Guerrero-Rascado, J.L. (author), Granados-Munoz, M.J. (author), Preissler, J. (author), Wagner, F. (author), Gausa, M. (author), Grigorov, I. (author), Stoyanov, D. (author), Iarlori, M. (author), Rizi, V. (author), Spinelli, N. (author), Boselli, A. (author), Wang, X. (author), lo Feudo, F. (author), Perrone, M.R. (author), de Tomasi, F. (author), Burlizzi, P. (author), Wandinger, U. (author), Freudenthaler, V. (author), Baars, H. (author), Amodeo, A. (author), Engelmann, R. (author), Mattis, I. (author), Gross, S. (author), Pappalardo, G. (author), Giunta, G. (author), D'Amico, G. (author), Chaikovsky, A. (author), Osipenko, F. (author), Slesar, A. (author), Nicolae, D. (author), Belegante, L. (author), Talianu, C. (author), Serikov, I. (author), Linne, H. (author), Jansen, F. (author), Apituley, A. (author), Wilson, K.M. (author), de Graaf, M. (author), Trickl, T. (author), Giehl, H. (author), Adam, D. (author), Comeron, A. (author), Munoz-Porcar, C. (author), Rocadenbosch, F. (author), Sicard, M. (author), Tomas, S. (author), de Lange, D. (author), Kumar, D. (author), Pujadas, M. (author), Molero, F. (author), Fernandez, A.F. (author), Alados-Arboledas, L. (author), Bravo-Aranda, J.A. (author), Navas-Guzman, F. (author), Guerrero-Rascado, J.L. (author), Granados-Munoz, M.J. (author), Preissler, J. (author), Wagner, F. (author), Gausa, M. (author), Grigorov, I. (author), Stoyanov, D. (author), Iarlori, M. (author), Rizi, V. (author), Spinelli, N. (author), Boselli, A. (author), Wang, X. (author), lo Feudo, F. (author), Perrone, M.R. (author), de Tomasi, F. (author), and Burlizzi, P. (author)

Abstract

This paper introduces the recent European Aerosol Research Lidar Network (EARLINET) quality-assurance efforts at instrument level. Within two dedicated campaigns and five single-site intercomparison activities, 21 EARLINET systems from 18 EARLINET stations were intercompared between 2009 and 2013. A comprehensive strategy for campaign setup and data evaluation has been established. Eleven systems from nine EARLINET stations participated in the EARLINET Lidar Intercomparison 2009 (EARLI09). In this campaign, three reference systems were qualified which served as traveling standards thereafter. EARLINET systems from nine other stations have been compared against these reference systems since 2009.We present and discuss comparisons at signal and at product level from all campaigns for more than 100 individual measurement channels at the wavelengths of 355, 387, 532, and 607 nm. It is shown that in most cases, a very good agreement of the compared systems with the respective reference is obtained. Mean signal deviations in predefined height ranges are typically below +- 2 %. Particle backscatter and extinction coefficients agree within +-2x10-4 km-1 sr-1 and +-0.01 km-1, respectively, in most cases. For systems or channels that showed larger discrepancies, an in-depth analysis of deficiencies was performed and technical solutions and upgrades were proposed and realized. The intercomparisons have reinforced confidence in the EARLINET data quality and allowed us to draw conclusions on necessary system improvements for some instruments and to identify major challenges that need to be tackled in the future., Geoscience and Remote Sensing, Civil Engineering and Geosciences

Published
2016

12. Lidar-Radiometer Inversion Code (LIRIC) for the retrieval of vertical aerosol properties from combined lidar/radiometer data: development and distribution in EARLINET

Author

Chaikovsky, A., primary, Dubovik, O., additional, Holben, B., additional, Bril, A., additional, Goloub, P., additional, Tanré, D., additional, Pappalardo, G., additional, Wandinger, U., additional, Chaikovskaya, L., additional, Denisov, S., additional, Grudo, Y., additional, Lopatin, A., additional, Karol, Y., additional, Lapyonok, T., additional, Amiridis, V., additional, Ansmann, A., additional, Apituley, A., additional, Allados-Arboledas, L., additional, Binietoglou, I., additional, Boselli, A., additional, D'Amico, G., additional, Freudenthaler, V., additional, Giles, D., additional, Granados-Muñoz, M. J., additional, Kokkalis, P., additional, Nicolae, D., additional, Oshchepkov, S., additional, Papayannis, A., additional, Perrone, M. R., additional, Pietruczuk, A., additional, Rocadenbosch, F., additional, Sicard, M., additional, Slutsker, I., additional, Talianu, C., additional, De Tomasi, F., additional, Tsekeri, A., additional, Wagner, J., additional, and Wang, X., additional

Published
2015
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17. EARLINET instrument intercomparison campaigns: overview on strategy and results

Author

Wandinger, U., primary, Freudenthaler, V., additional, Baars, H., additional, Amodeo, A., additional, Engelmann, R., additional, Mattis, I., additional, Groß, S., additional, Pappalardo, G., additional, Giunta, A., additional, D'Amico, G., additional, Chaikovsky, A., additional, Osipenko, F., additional, Slesar, A., additional, Nicolae, D., additional, Belegante, L., additional, Talianu, C., additional, Serikov, I., additional, Linné, H., additional, Jansen, F., additional, Apituley, A., additional, Wilson, K. M., additional, de Graaf, M., additional, Trickl, T., additional, Giehl, H., additional, Adam, M., additional, Comerón, A., additional, Muñoz, C., additional, Rocadenbosch, F., additional, Sicard, M., additional, Tomás, S., additional, Lange, D., additional, Kumar, D., additional, Pujadas, M., additional, Molero, F., additional, Fernández, A. J., additional, Alados-Arboledas, L., additional, Bravo-Aranda, J. A., additional, Navas-Guzmán, F., additional, Guerrero-Rascado, J. L., additional, Granados-Muñoz, M. J., additional, Preißler, J., additional, Wagner, F., additional, Gausa, M., additional, Grigorov, I., additional, Stoyanov, D., additional, Iarlori, M., additional, Rizi, V., additional, Spinelli, N., additional, Boselli, A., additional, Wang, X., additional, Lo Feudo, T., additional, Perrone, M. R., additional, De Tomasi, F., additional, and Burlizzi, P., additional

Published
2015
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18. EARLINET correlative measurements for CALIPSO: First intercomparison results RID F-8484-2011

Author

Pappalardo, G, Wandinger, U, Mona, L, Hiebsch, A, Mattis, I, Amodeo, A, Ansmann, A, Seifert, P, Linne, H, Apituley, A, Arboledas, La, Balis, D, Chaikovsky, A, D'Amico, G, De Tomasi, F, Freudenthaler, V, Giannakaki, E, Giunta, A, Grigorov, I, Iarlori, M, Madonna, F, Mamouri, Re, Nasti, L, Papayannis, A, Pietruczuk, A, Pujadas, M, Rizi, V, Rocadenbosch, F, Russo, F, Schnell, F, Spinelli, N, Wang, X, and Wiegner, M

Published
2010

19. THE EARLINET CONTRIBUTION TO THE EARTHCARE MISSION

Author

Pappalardo G., Wandinger U., Mona L., Mattis I., Hiebsch A., Amodeo A., Ansmann A., Linné H., Apituley A., Arboledas L. A., Balis D., Chaikovsky A., D’Amico G., De Tomasi F., Freudenthaler V., Giannakaki E., Giunta A., Grigorov I., Iarlori M., and Madonna F.

Published
2009

20. Monitoring O3 with solar-blind Raman lidars

Author

Perrone Mr, de Tomasi F, and Protopapa Ml

Subjects
Ozone, Materials science, business.industry, Materials Science (miscellaneous), Absorption cross section, Industrial and Manufacturing Engineering, Aerosol, Dial, chemistry.chemical_compound, symbols.namesake, Lidar, Optics, chemistry, Temporal resolution, Mixing ratio, symbols, Business and International Management, business, Raman spectroscopy, Remote sensing
Abstract

The benefits of retrieving ozone concentration profiles by a use of a single Raman signal rather than the Raman differential absorption lidar (DIAL) technique are investigated by numerical simulations applied either to KrF- (248 nm) or to quadrupled Nd:YAG- (266 nm) based Raman lidars, which are used for both daytime and nighttime monitoring of the tropospheric water-vapor mixing ratio. It is demonstrated that ozone concentration profiles of adequate accuracy and spatial and temporal resolution can be retrieved under low aerosol loading by a single Raman lidar because of the large value of the ozone absorption cross section both at 248 nm and at 266 nm. Then experimental measurements of Raman signals provided by the KrF-based lidar operating at the University of Lecce (40 degrees 20'N, 18 degrees 6'E) are used to retrieve ozone concentration profiles by use of the Raman DIAL technique and the nitrogen Raman signal.

Published
2008

27. EARLINET: A European Aerosol Research Lidar Network to Establish an Aerosol Climatology

Author

B¨osenberg, J., Matthias, V., Amodeo, A., Amoiridis, V., Ansmann, A., Baldasano, J. M., Balin, I., Balis, D., B¨ockmann, C., Boselli, A., Carlsson, G., Chaikovsky, A., Chourdakis, G., Comer´on, A., De Tomasi, F., Eixmann, R., Freudenthaler, V., Giehl, H., Grigorov, I., H°ag°ard, A., Iarlori, M., Kirsche, A., Kolarov, G., Komguem, L., Kreipl, S., Kumpf, W., Larchevˆeque, G., Linn´e, H., Matthey, R., Mattis, I., Mekler, A., Mironova, I., Mitev, V., Mona, L., M¨ uller, D., Music, S., Nickovic, S., Pandolfi, M., Papayannis, A., Pappalardo, G., Pelon, J., P´erez, C., Perrone, R. M., Persson, R., Resendes, D. P., Rizi, Vincenzo, Rocadenbosch, F., Rodrigues, J. A., Sauvage, L., Schneidenbach, L., Schumacher, R., Shcherbakov, V., Simeonov, V., Sobolewski, P., Spinelli, N., Stachlewska, I., Stoyanov, D., Trickl, T., Tsaknakis, G., Vaughan, G., Wandinger, U., Wang, X., Wiegner, M., Zavrtanik, M., and Zerefos, C.

Published
2003

28. Ultraviolet laser processing of SmS films

Author

De Tomasi F., Perrone M. R., Protopapa M. L., and Leo G.

Subjects
Semiconductors, Sensors, Laser irradiation
Abstract

Samarium monosulfide (SmS) films deposited by flash evaporation to realise pressure sensors have been processed by ultraviolet laser radiation at 308 nm to modulate their electrical resistance. The laser irradiation effects on the resistance of SmS films have been investigated at different laser fluences. It is shown that the SmS film resistance can be significantly modulated, even at fluences lower than the laser ablation fluence. The effects induced by laser processing on the film surface structure have also been investigated.

Published
2002

29. Lidar intercomparisons on algorithm and system level in the frame of EARLINET

Author

Matthias, V., B¨ockmann, C., Freudenthaler, V., Pappalardo, G., B¨osenberg, J., Amiridis, V., Amodeo, A., Ansmann, A., Balis, D., Boselli, A., Chaykovski, A., Chourdakis, G., Comeron, A., Delaval, A., De Tomasi, F., Eixmann, R., Frioud, M., H°ag°ard, A., Iarlori, M., Komguem, L., Kreipl, S., Larchev ˆeque, G., Linn´e, H., Matthey, R., Mattis, I., Papayannis, A., Pelon, J., Perrone, R. M., Persson, R., Resendes, D. P., Rizi, Vincenzo, Rocadenbosch, F., Rodriguez, J. A., Sauvage, L., Schneider, J., Schumacher, R., Shcherbakov, V., Simeonov, V., Wandinger, U., Wang, X., Wiegner, M., and Zerefos, C.

Published
2002

30. Laser irradiation effects on the resistance of sms films

Author

De Tomasi F., Perrone M.R., Protopapa M.L., and Leo G.

Abstract

Samarium monosulfide (SmS) films deposited by flash evaporation to realise pressure sensors have been processed by ultraviolet laser radiation at 308 nm to modulate their electrical resistance. The laser irradiation effects on the resistance of SmS films have been investigated at different laser fluences. It is shown that the SmS film resistance can be significantly modulated, even at fluences lower than the laser ablation fluence. The effects induced by laser processing on the film surface structure have also been investigated.

Published
2002

34. Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET

Author

Pappalardo, G., primary, Mona, L., additional, D'Amico, G., additional, Wandinger, U., additional, Adam, M., additional, Amodeo, A., additional, Ansmann, A., additional, Apituley, A., additional, Alados Arboledas, L., additional, Balis, D., additional, Boselli, A., additional, Bravo-Aranda, J. A., additional, Chaikovsky, A., additional, Comeron, A., additional, Cuesta, J., additional, De Tomasi, F., additional, Freudenthaler, V., additional, Gausa, M., additional, Giannakaki, E., additional, Giehl, H., additional, Giunta, A., additional, Grigorov, I., additional, Groß, S., additional, Haeffelin, M., additional, Hiebsch, A., additional, Iarlori, M., additional, Lange, D., additional, Linné, H., additional, Madonna, F., additional, Mattis, I., additional, Mamouri, R.-E., additional, McAuliffe, M. A. P., additional, Mitev, V., additional, Molero, F., additional, Navas-Guzman, F., additional, Nicolae, D., additional, Papayannis, A., additional, Perrone, M. R., additional, Pietras, C., additional, Pietruczuk, A., additional, Pisani, G., additional, Preißler, J., additional, Pujadas, M., additional, Rizi, V., additional, Ruth, A. A., additional, Schmidt, J., additional, Schnell, F., additional, Seifert, P., additional, Serikov, I., additional, Sicard, M., additional, Simeonov, V., additional, Spinelli, N., additional, Stebel, K., additional, Tesche, M., additional, Trickl, T., additional, Wang, X., additional, Wagner, F., additional, Wiegner, M., additional, and Wilson, K. M., additional

Published
2013
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36. Experimental Study Of Caesium 6p$_{;J};$+6p$% _{;J}; Ightarrow $ 6s+N$_{;Ljprime };$ Energy Pooling Collisions And Modeling Of Laser Excited Atom Density In Presence Of Optical Pumping And Radiation Trapping

Author

De Tomasi, F., Milošević, Slobodan, Verkerk, P., Fioretti, A., Allegrini, M., Jabbour, Z.J., and Huennekens, J.

Subjects
energy pooling, optical pumping, radiation trapping, Physics::Atomic Physics
Abstract

An experimental study of caesium energy pooling collisions, Cs(6P(J)) + Cs(6P(J)) --> Cs(7P(J')) + Cs(6S(1/2)), at thermal energies, has been carried out in a capillary cell using diode laser excitation. Use of the capillary cell minimizes the effects of radiation trapping, but nonetheless, such effects still play a significant role in the analysis. Consequently, a rate equation model, which treats simultaneous effects of saturation, optical pumping, and radiation trapping, has been developed and is used to determine the Cs(6P(J)) atom density under these experimental conditions. The excited atom densities are combined with measured fluorescence ratios to determine rate coefficients for the caesium energy pooling process. Our values for these rate coefficients are in agreement, within combined error bars, with values we have recently obtained under very different experimental conditions.

Published
1997

39. Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET

Author

Pappalardo, G., primary, Mona, L., additional, D'Amico, G., additional, Wandinger, U., additional, Adam, M., additional, Amodeo, A., additional, Ansmann, A., additional, Apituley, A., additional, Alados Arboledas, L., additional, Balis, D., additional, Boselli, A., additional, Bravo-Aranda, J. A., additional, Chaikovsky, A., additional, Comeron, A., additional, Cuesta, J., additional, De Tomasi, F., additional, Freudenthaler, V., additional, Gausa, M., additional, Giannakaki, E., additional, Giehl, H., additional, Giunta, A., additional, Grigorov, I., additional, Groß, S., additional, Haeffelin, M., additional, Hiebsch, A., additional, Iarlori, M., additional, Lange, D., additional, Linné, H., additional, Madonna, F., additional, Mattis, I., additional, Mamouri, R.-E., additional, McAuliffe, M. A. P., additional, Mitev, V., additional, Molero, F., additional, Navas-Guzman, F., additional, Nicolae, D., additional, Papayannis, A., additional, Perrone, M. R., additional, Pietras, C., additional, Pietruczuk, A., additional, Pisani, G., additional, Preißler, J., additional, Pujadas, M., additional, Rizi, V., additional, Ruth, A. A., additional, Schmidt, J., additional, Schnell, F., additional, Seifert, P., additional, Serikov, I., additional, Sicard, M., additional, Simeonov, V., additional, Spinelli, N., additional, Stebel, K., additional, Tesche, M., additional, Trickl, T., additional, Wang, X., additional, Wagner, F., additional, Wiegner, M., additional, and Wilson, K. M., additional

Published
2012
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46. Coordinated lidar observations of Saharan dust over Europe in the frame of EARLINET-AS0S project during CALIPSO overpasses: a strong dust case study analysis with modeling support

Author

Papayannis, A., primary, Amiridis, V., additional, Mona, L., additional, Mamouri, R. E., additional, Apituley, A., additional, Alados-Arboledas, L., additional, Balis, D., additional, Chaikovski, A., additional, de Tomasi, F., additional, Grigorov, I., additional, Gustafsson, O., additional, Linnè, H., additional, Mattis, I., additional, Mitev, V., additional, Molero, F., additional, Müller, D., additional, Nicolae, D., additional, Pérez, C., additional, Pietruczuk, A., additional, Putaud, J. P., additional, Ravetta, F., additional, Rizi, V., additional, Schnell, F., additional, Sicard, M., additional, Simeonov, V., additional, Stebel, K., additional, Trickl, T., additional, D'Amico, G., additional, Pappalardo, G., additional, and Wang, X., additional

Published
2009
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50. Systematic lidar observations of Saharan dust over Europe in the frame of EARLINET (2000–2002)

Author

Papayannis, A., primary, Amiridis, V., additional, Mona, L., additional, Tsaknakis, G., additional, Balis, D., additional, Bösenberg, J., additional, Chaikovski, A., additional, De Tomasi, F., additional, Grigorov, I., additional, Mattis, I., additional, Mitev, V., additional, Müller, D., additional, Nickovic, S., additional, Pérez, C., additional, Pietruczuk, A., additional, Pisani, G., additional, Ravetta, F., additional, Rizi, V., additional, Sicard, M., additional, Trickl, T., additional, Wiegner, M., additional, Gerding, M., additional, Mamouri, R. E., additional, D'Amico, G., additional, and Pappalardo, G., additional

Published
2008
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