Corona discharge experiments in admixtures of N<sub>2</sub>and CH<sub>4</sub>: a laboratory simulation of Titan's atmosphere

Horváth, G.; Skalný, J. D.; Mason, Nigel J.; Klas, M.; Záhoran, M.; Vladoiu, R.; Manole, M.

doi:10.1088/0963-0252/18/3/034016

Cited by 27 publications

(27 citation statements)

References 42 publications

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“…In contrast to our earlier measurements made in a coaxial corona discharge [23], NH 3 was observed as a new product in the abnormal glow discharge identified by its strong peak at 966 cm −1 , surrounded by dense rotational in range 800-1200. Bands at around 3300 cm…”

Section: Experimental Set-upcontrasting

confidence: 99%

“…The most likely primary processes leading to the polymer formation is a transport of active CN and C/C 2 radicals onto the electrode surfaces where they are neutralized before undergoing a series of homogeneous reactions with other radicals leading to deposit formation. Moreover, it is postulated that negative ions may play a key role in the formation of such deposits [23].…”

Section: -P7mentioning

confidence: 99%

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Organic chemistry of NH₃and HCN induced by an atmospheric abnormal glow discharge in N₂-CH₄mixtures

Horváth

Krčma

Polachova

et al. 2010

Eur. Phys. J. Appl. Phys.

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Abstract. The formation of the chemical products produced in an atmospheric glow discharge fed by a N2-CH4 gas mixture has been studied using Fourier Transform InfraRed (FTIR) and Optical Emission Spectrometry (OES). The measurements were carried out in a flowing regime at ambient temperature and pressure with CH4 concentrations ranging from 0.5% to 2%. In the recorded emission spectra the lines of the second positive system CN system and the first negative system of N2 were found to be the most intensive but atomic H α , H β , and C (247 nm) lines were also observed. FTIR-measurements revealed HCN and NH3 to be the major products of the plasma with traces of C2H2. These same molecules have been detected in Titan's atmosphere and the present experiments may provide some novel insights into the chemical and physical mechanisms prevalent in Titan's atmosphere with these smaller species believed to be the precursors of heavier organic species in Titan's atmosphere and on its surface.

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Section: Experimental Set-upcontrasting

confidence: 99%

Section: -P7mentioning

confidence: 99%

Organic chemistry of NH₃and HCN induced by an atmospheric abnormal glow discharge in N₂-CH₄mixtures

Horváth

Krčma

Polachova

et al. 2010

Eur. Phys. J. Appl. Phys.

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“…Thus the C 2 H 2 neutral -detected in our earlier measurements made in coaxial corona discharge [12]-leads to the formation of CN − , C 3 N − and C 5 N − anions rather than C 2 H − production. The formation of cluster anions in low-power discharges has been reported by several authors.…”

Section: Resultsmentioning

confidence: 62%

Negative ions formed in N₂/CH₄/Ar discharge – A simulation of Titan's atmosphere chemistry

Horváth

Aranda-Gonzalvo

Mason

et al. 2009

Eur. Phys. J. Appl. Phys.

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Abstract. The formation of negative ions produced in a negative point-to-plane corona discharge fed by a Ar/N2/CH4 gas mixture has been studied using mass spectrometry. The measurements were carried out in flowing regime at ambient temperature and a reduced pressure of 460 mbar. The CN − anion has been found to be the most dominant negative ion in the discharge and is believed to be the precursor of heavier negative ions such as C3N− and C5N − . The most likely pathway for the formation of such molecular anions is H-loss dissociative electron attachment to HCN, H3CN and H5CN formed in the discharge. These same anions have been detected in Titan's atmosphere and the present experiments may provide some novel insights into the chemical and physical mechanisms prevalent in Titan's atmosphere and hence assist in the interpretation of results from the Cassini Huygens space mission.

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“…The energy sources used in the laboratory are proxies for the solar irradiation and the precipitation of magnetospheric electrons. Those natural sources are reproduced in the laboratory by UV photon fluxes Imanaka and Smith 2010;Trainer et al 2012;Tran et al 2008;Trainer et al 2006) and/or by plasma discharges (Somogyi et al 2005;Coll et al 1999;Horvath et al 2009;Imanaka et al 2004;Hörst and Tolbert 2013). Pressure and temperature are strongly dependent on the experiments, and can hardly reproduce the whole range and extreme conditions occurring in real atmospheres.…”

Section: Simulation Facilities For Organic Aerosols In Planetary Atmomentioning

confidence: 99%

Earth as a Tool for Astrobiology—A European Perspective

et al. 2017

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Scientists use the Earth as a tool for astrobiology by analyzing planetary field analogues (i.e. terrestrial samples and field sites that resemble planetary bodies in our Solar System). In addition, they expose the selected planetary field analogues in simulation chambers to conditions that mimic the ones of planets, moons and Low Earth Orbit (LEO) space conditions, as well as the chemistry occurring in interstellar and cometary ices. This paper reviews the ways the Earth is used by astrobiologists: (i) by conducting planetary field analogue studies to investigate extant life from extreme environments, its metabolisms, adaptation strategies and modern biosignatures; (ii) by conducting planetary field analogue studies to investigate extinct life from the oldest rocks on our planet and its biosignatures; (iii) by exposing terrestrial samples to simulated space or planetary environments and producing a sample analogue to investigate changes in minerals, biosignatures and microorganisms. The European Space Agency (ESA) created a topical team in 2011 to investigate recent activities using the Earth as a tool for astrobiology and to formulate recommendations and scientific needs to improve ground-based astrobiological research. Space is an important tool for astrobiology (see Horneck et al. in Astrobiology, 16:201-243, 2016;Cottin et al., 2017), but access to space is limited. Complementing research on Earth provides fast access, more replications and higher sample throughput. The major conclusions of the topical team and suggestions for the future include more scientifically qualified calls for field campaigns with planetary analogy, and a centralized point of contact at ESA or the EU for the organization of a survey of such expeditions. An improvement of the coordinated logistics, infrastructures and funding system supporting the combination of field work with planetary simulation investigations, as well as an optimization of the scientific return and data processing, data storage and data distribution is also needed. Finally, a coordinated EU or ESA education and outreach program would improve the participation of the public in the astrobiological activities.

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Corona discharge experiments in admixtures of N₂and CH₄: a laboratory simulation of Titan's atmosphere

Abstract: Corona discharge experiments in admixtures of N2 and CH4: a laboratory simulation of Titan's atmosphere. Plasma Sources Science and Technology, 18(3) For guidance on citations see FAQs.

Cited by 27 publications

References 42 publications

Organic chemistry of NH₃and HCN induced by an atmospheric abnormal glow discharge in N₂-CH₄mixtures

Organic chemistry of NH₃and HCN induced by an atmospheric abnormal glow discharge in N₂-CH₄mixtures

Negative ions formed in N₂/CH₄/Ar discharge – A simulation of Titan's atmosphere chemistry

Earth as a Tool for Astrobiology—A European Perspective

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Corona discharge experiments in admixtures of N2and CH4: a laboratory simulation of Titan's atmosphere

Abstract: Corona discharge experiments in admixtures of N2 and CH4: a laboratory simulation of Titan's atmosphere. Plasma Sources Science and Technology, 18(3) For guidance on citations see FAQs.

Cited by 27 publications

References 42 publications

Organic chemistry of NH3and HCN induced by an atmospheric abnormal glow discharge in N2-CH4mixtures

Organic chemistry of NH3and HCN induced by an atmospheric abnormal glow discharge in N2-CH4mixtures

Negative ions formed in N2/CH4/Ar discharge – A simulation of Titan's atmosphere chemistry

Earth as a Tool for Astrobiology—A European Perspective

Contact Info

Product

Resources

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Corona discharge experiments in admixtures of N₂and CH₄: a laboratory simulation of Titan's atmosphere

Organic chemistry of NH₃and HCN induced by an atmospheric abnormal glow discharge in N₂-CH₄mixtures

Organic chemistry of NH₃and HCN induced by an atmospheric abnormal glow discharge in N₂-CH₄mixtures

Negative ions formed in N₂/CH₄/Ar discharge – A simulation of Titan's atmosphere chemistry