Zobrazeno 1 - 10
of 966
pro vyhledávání: '"Constant E."'
Publikováno v:
Annals of Human Biology, Vol 44, Iss 6, Pp 554-561 (2017)
Background: The last study to establish centiles of main anthropometric measurements in Kinshasa was conducted over 60 years ago, which questions its current adequacy to describe or monitor growth in this population. Aim: To assess the nutritional st
Externí odkaz:
https://doaj.org/article/6f78e0b4e3a24d979493c7deecbbc579
Autor:
Hervé M., Castellanos P., Karras G., Despré V., Marciniak A., Constant E., Loriot V., Kuleff A.I., Tielens A. G. G. M., Lépine F.
Publikováno v:
EPJ Web of Conferences, Vol 205, p 06012 (2019)
Understanding processes induced by XUV excitation of Polycyclic Aromatic Hydrocarbons (PAHs) is at the heart of molecular astrophysics, which aims at understanding molecular evolution in interstellar media. We used ultrashort XUV pulses to produce hi
Externí odkaz:
https://doaj.org/article/3ab7ff4369fd421ab428c99b208ba504
Autor:
Veyrinas, K., Plach, M., Peschel, J., Hoflund, M., Catoire, F., Valentin, C., Smorenburg, P., Dacasa, H., Maclot, S., Guo, C., Wikmark, H., Zair, A., Strelkov, V., Picot, C., Arnold, C., Eng-Johnsson, P., Huillier, A. L, Mevel, E., Constant, E.
Attosecond pulses created by high-order harmonic generation in gases often exhibit strong chromatic aberrations, arising from the broad bandwidth and wavelength-dependent nonlinear light-matter interaction. When the driving laser intensity varies spa
Externí odkaz:
http://arxiv.org/abs/2301.11017
Autor:
Haessler, S., Fabre, B., Higuet, J., Caillat, J., Ruchon, T., Breger, P., Carré, B., Constant, E., Maquet, A., Mével, E., Salières, P., Taïeb, R., Mairesse, Y.
Publikováno v:
Physical Review A 80, 011404(R) (2009)
We photoionize nitrogen molecules with a train of extreme ultraviolet attosecond pulses together with a weak infrared field. We measure the phase of the two-color two-photon ionization transition (molecular phase) for different states of the ion. We
Externí odkaz:
http://arxiv.org/abs/2207.08310
Autor:
Weissenbilder, R., Carlström, S., Rego, L., Guo, C., Heyl, C. M., Smorenburg, P., Constant, E., Arnold, C. L., L'Huillier, A.
High-order harmonic generation (HHG) in gases leads to short-pulse extreme ultraviolet (XUV) radiation useful in a number of applications, for example, attosecond science and nanoscale imaging. However, this process depends on many parameters and the
Externí odkaz:
http://arxiv.org/abs/2202.08202
We present a recently developed terahertz platform. An air plasma produced by an ultrashort two-color laser pulse serves as a broadband terahertz source, with electric field that has peak amplitude in the MV/cm range. Air biased coherent detection of
Externí odkaz:
http://arxiv.org/abs/2112.09657
Autor:
Hort, O., Dubrouil, A., Khokhlova, M. A., Descamps, D., Petit, S., Burgy, F., Mevel, E., Constant, E., Strelkov, V. V.
We observe a new regime of coherent XUV radiation generation in noble gases induced by femtosecond pulses at very high intensities. This XUV emission has both a reduced divergence and spectral width as compared to high-order harmonic generation (HHG)
Externí odkaz:
http://arxiv.org/abs/2005.06415
Publikováno v:
EPJ Web of Conferences, Vol 41, p 10021 (2013)
By using optical-field-ionization of helium we postcompress 50 fs pulses to 8 fs with a pulse energy of 8,7 mJ. Hence few cycle pulses were obtained with TW peak power and a good shot-to-shot stability.
Externí odkaz:
https://doaj.org/article/5d0ddb456fff41cdbf16dbc990432fe3
Publikováno v:
EPJ Web of Conferences, Vol 41, p 01015 (2013)
Fiber based laser systems at high repetition rate are becoming very attractive for high-order harmonics generation as they allow to reach high intensities. Their characteristics (central wavelength, energy and pulse duration) require specific optimiz
Externí odkaz:
https://doaj.org/article/57b7c9e8262f4e4b851851fa4acf0a83
Autor:
Veyrinas, K., Valentin, C., Descamps, D., Péjot, C., Burgy, F., Catoire, F., Constant, E., Mével, E.
Controlling the wavefront of an extreme ultraviolet (XUV) high-order harmonic beam during the generation process offers to focus the beam without resorting to any XUV optics. By characterizing the XUV intensity profile and wavefront, we quantitativel
Externí odkaz:
http://arxiv.org/abs/1912.12707