Zobrazeno 1 - 10 of 12 pro vyhledávání: '"Martina Wiedner"'
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A 530-590 GHZ SCHOTTKY HETERODYNE RECEIVER FOR HIGH-RESOLUTION MOLECULAR SPECTROSCOPY WITH LILLE'S FAST-SCAN FULLY SOLID-STATE DDS SPECTROMETER
Autor: A. Pienkina, Fabien Defrance, Alain Maestrini, Martina Wiedner, R. Motiyenko, L. Margulès
Publikováno v: 72nd International Symposium on Molecular Spectroscopy: June 19-23
72nd International Symposium on Molecular Spectroscopy: June 19-23, University of Illinois at Urbana-Champaign, pp.1-1, 2017, ⟨10.15278/isms.2017.TH09⟩
Laboratory spectroscopy, especially at THz and mm-wave ranges require the advances in instrumentation techniques to provide high resolution of the recorded spectra with precise frequency measurement that facilitates the mathematical treatment. We rep
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fd1fbbe43466ac23964991a0ed41331
https://doi.org/10.15278/isms.2017.th09
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4
Challenges of the opto-mechanical conceptual design of a small far-IR balloon experiment
Autor: David Horville, J. L. Dournaux, Martina Wiedner, Martine Jouret, Laurent Pagani, Alexia Romanow, Jean-Michel Krieg, Albert Gomes, Christophe Berthod, J. M. Huet, Jean Evrard, Philippe Laporte
Publikováno v: SPIE Proceedings.
Astronomers require more and more precise instruments for their observations. Here we describe the challenges encountered in the optical and mechanical designs of the CIDRE (Campagne d’Identification du Deuterium par Reception hEterodyne) project,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd7e3588ad7fe2c565423e6e798f7717
https://doi.org/10.1117/12.2054986
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6
Non-periodic phase gratings
Autor: Fabien Defrance, Massimiliano Casaletti, Julien Sarrazin, Martina Wiedner, Yan Delorme, Grégori Gay, Roland Lefevre
Publikováno v: HAL
Conference ISSTT 2015
Conference ISSTT 2015, Mar 2015, Cambridge (Massachusetts), United States. pp.16-18
International audience; For heterodyne array receivers, phase gratings are useful to divide the local oscillator (LO) signal into several beams to pump the mixers of an array. We have developed a computer model to compute general phase profiles that
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2a5dd159ff93ca48c434fea0028ab692
https://hal.sorbonne-universite.fr/hal-01150551
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7
Structured Surface Design to Generate Any Beam Pattern at THz Frequencies
Autor: Fabien Defrance, Massimiliano Casaletti, Julien Sarrazin, Martina Wiedner, Hugh Gibson, Gregory Gay, Roland Lefevre, Yan Delorme
Publikováno v: HAL
Conference EuCAP 2017
Conference EuCAP 2017, Mar 2017, Paris, France
International audience; An iterative alternate projection-based algorithm is developed to design structured surfaces able to generate any far-field beam pattern at GHz and THz frequencies. To validate the algorithm, two structured profiles (a reflect
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::479c12b235969b74a40fb68944c42482
https://hal.sorbonne-universite.fr/hal-01511490
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9
Instrumentation d'un récepteur hétérodyne à 2.6 THz
Autor: Defrance, Fabien
Publikováno v: Instrumentation and Methods for Astrophysic [astro-ph.IM]. Université Pierre et Marie Curie-Paris VI, 2015. English. ⟨NNT : 2015PA066521⟩
Instrumentation and Methods for Astrophysic [astro-ph.IM]. UPMC-Université Paris 6 Pierre et Marie Curie, 2015. English
Knowledge of the interstellar medium (ISM) is essential to understand the stellar life cycle, beside others. The ISM can be traced by the emission or absorption lines of molecules, atoms and ions. Different molecules/atoms/ions trace different phases
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::29eabcd38b74ec8afa2226263e713795
https://theses.hal.science/tel-01314133/file/2015PA066521.pdf
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Development of multipixel heterodyne imaging arrays for future space missions
Autor: Delfini, Duccio
Publikováno v: Astrophysics [astro-ph]. PSL Research University, 2018. English. ⟨NNT : 2018PSLEO019⟩
The observation of the interstellar medium is very important at mm/(sub)mm/THz frequencies to understand how stars and planets form. Generally such observations rely on heterodyne receivers. These are instruments that achieve very high spectral resol
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3b1e02227b68e3f54b36db4c75ef3630
https://tel.archives-ouvertes.fr/tel-02125944/document
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