published or not.The documents may come from teaching and research institutions in France abroad, public private centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement recherche français étrangers, laboratoires publics privés. Numerical modelling of the effect dry air traces a helium parallel plate dielectric barrier discharge

In this paper a validated 2D axisymmetric plasma fluid model was used to study the influence of level nitrogen impurities on processes that occur in helium parallel plate dielectric barrier discharge. The varied range 0.1–500 ppm. It observed significantly affect dominant ion species at breakdown and discharge characteristics. Specifically, three different ions were found, which are strongly dependent impurities. These are: (0.1–35 ppm), (35–150 ppm) (150–500 ppm). addition, results show...

Atmospheric pressure plasma jets (APPJs) can be generated in capillary tubes flowing with pure helium and admixtures of oxygen into the helium. The jet exiting tube used for a variety applications through surface interaction. In this study, two-dimensional axi-symmetric model has been developed to provide insight evolution without their interaction dielectric placed normal axis. considers gas mixing ambient air analytical chemistry between helium, nitrogen species. Experiments were performed...

We present a theoretical quasiclassical treatment of the formation, during Coulomb explosion, highly excited neutral H atoms (${\text{H}}^{*}$) for strongly driven ${\text{H}}_{2}$. This process, where after laser field is turned off, one electron escapes to continuum while other occupies Rydberg state, was recently reported in an experimental study [B. Manschwetus et al., Phys. Rev. Lett. 102, 113002 (2009)]. find that two-electron effects are important order correctly account all pathways...

We study the formation of highly excited neutral atoms during break-up strongly-driven molecules. Past work on this significant phenomenon has shown that ($\mathrm{H^{*}}$) H$_{2}$ in a linear laser field electron escapes does so either very quickly or after remaining bound for few periods field. Here, we address electron-nuclear dynamics $\mathrm{H^{*}}$ elliptical fields, through Coulomb explosion. show with increasing ellipticity two-electron effects are effectively "switched-off"....

We study a single two-level atom interacting with reservoir of modes defined by structure function frequency gap. Using the pseudomodes technique, we derive main features trapping state formed in weak coupling regime. Utilizing different entanglement measures show that strong correlations and between are existence when this is formed. Furthermore, an unexpected feature for revealed. In long time limit spectrum not constant time.

A new soft ionization device for mass spectrometry is presented using the flexible microtube plasma under controlled atmospheric conditions. The atmosphere consists of source itself connected to a gas chromatograph and spectrometer borosilicate glass cross piece. Controlled atmosphere, example, nitrogen and/or an oxygen mixture, introduced system create clean environment. Reproducibility issues are discussed, solutions manipulating flow in proof concept shown ketone mixture optimize...

In this study, a one-dimensional plasma fluid model is used to shed light into the evolution of He/dry air (500 ppm, 79% N2 and 21% O2) dielectric barrier discharge (DBD) under different levels water admixtures (20 2000 ppm).The considers analytical chemistry between helium, nitrogen, oxygen species it verified with experimental results ensure its correctness.The simulation show that highly affect characteristics dominant ions in mixture.In particular, was observed increase mixture up 600...

Ambient Ionization Mass Spectrometry (AI-MS) techniques have revolutionized analytical chemistry by enabling rapid analysis of samples under atmospheric conditions with minimal to no preparation.

We analyze the problem of a single mode field interacting with pair two level atoms. The atoms enter and exit cavity at different times. Instead using constant coupling, we use time-dependent couplings which represent spatial dependence mode. Although system evolution is adiabatic for most time, previously unstudied energy crossing plays key role in dynamics when have time delay. show that conditional atom-cavity entanglement can be generated, while large photon numbers entangled has...

In the present report, an atmospheric pressure plasma jet is sustained in a helium channel by high square wave unipolar voltage. The gas flow rate and features (amplitude, frequency, duty cycle) are varied over wide range, while ultraviolet to near infrared emission recorded. pattern, propagation dynamics of involved ionization fronts, relative density critical excited species, rotational vibrational temperatures neutral ionic species measured. An optimum operational window found...

Using a semi-classical model, we study the formation of highly excited neutral fragments during fragmentation , two-electron triatomic molecule, driven by an intense near-IR laser field. To do so, first formulate microcanonical distribution for arbitrary one-electron molecules. We then frustrated double and single ionization in strongly compute kinetic energy release nuclei these two processes. Moreover, investigate dependence on strength field as well geometry initial molecular state.

We developed an in silico approach to model B16F10 melanoma cell response a helium atmospheric pressure plasma jet (APPJ) or/and doxorubicin drug (DOX). The is informed by relevant data from previously published vitro experiments (cancer viability), providing detailed information on (i) population number (Ncell) development during incubation and (ii) probability values for apoptosis (%PApoptosis) mitosis (%PMitosis) following subjection the plasma-conditioned RPMI-1640 medium (PC-RPMI), DOX,...

Trichel pulses for negative direct current corona discharge in a pin plate configuration under open dry air conditions are investigated using two numerical models. The first well known general model takes electrons and positive ions into consideration. second model, more detailed one, other 16 nitrogen oxygen species Both models able to capture the evolution of electrical discharge. However, is also show effect behavior contribution specific on results that play key role development pulses....

We present an analytic description of the effects dephasing processes on stimulated Raman adiabatic passage in a tripod quantum system. To this end, we develop effective two-level model. Our analysis makes use approximation weak regime. An master equation for system formed by two dark states is derived, where solutions are obtained utilizing Demkov-Kunike From these, it found that fidelity final coherent superposition state decreases exponentially increasing rates. Depending pulse ordering...

We investigate the dynamics of a continuous atom laser based on merging independently formed atomic condensates. In first attempt to understand system, we consider two independent elongated Bose–Einstein condensates which approach each other and focus intermediate inter-trap distances so that two-mode model is well justified. framework mean-field theory, discuss quasi-steady-state population traps as energy distribution outcoupled atoms.

In this work, we investigate the theory for three different unidirectional population-transfer schemes in trapped multilevel systems which can be utilized to cool molecular ions. The approach use exploits laser-induced coupling between internal and motional degrees of freedom so that state a molecule mapped onto motion an external trapping potential. By sympathetically cooling translational back into its ground state, mapping process employed as part scheme rotational levels. This step is...

We investigate aspects of the dynamics a continuous atom-laser scheme based on merging independently formed atomic condensates. Our theoretical analysis covers Markovian as well non-Markovian operational regimes, and is semiclassical (mean-field) two-mode model. The role relative phase between two condensates effect interatomic interactions evolution trapped populations distribution outcoupled atoms are discussed.

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not.The documents may come from teaching institutions in France abroad, public private centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement recherche français étrangers, laboratoires publics privés.

We present a theoretical quasi-classical study of the formation, during Coulomb explosion, two highly excited neutral H atoms (double H*) strongly driven H2. In this process, after laser field is turned off each electron occupies Rydberg state an atom. identify route for forming H* and show that two-electron effects are important. also find both ionization steps 'frustrated' in double whereas only one step routes leading to single as was shown by Emmanouilidou et al (2012 Phys. Rev. A 85...

Abstract In this study, the effect of O 2 and N Penning ionization reactions on evolution a capillary helium atmospheric pressure plasma jet (APPJ) with without presence oxygen admixtures is investigated numerically using two dimensional axi-symmetric model. order to better understand potential applications surface interaction, He + (1000 ppm) APPJ launched into dielectric target. Moreover, numerical model compared experimental measurements showing that captures right physics can elucidate...

We formulate a microcanonical distribution for an arbitrary one-electron triatomic molecule. This can be used to describe the initial state in strongly-driven two-electron molecules. Namely, many semiclassical models that ionization of molecules driven by intense infrared laser fields tunneling regime initially one electron tunnels while other is bound. The presented this work bound electron.

This paper reports the development and application of a two dimensional transient numerical model for coventional silicon solar cells study effect positive ion deposition on cell's surface occurring during potential-induced degradation (PID). The results obtained from indicate impact p-n junction depletion region dielectric layer in an area between grid fingers busbars cell. SixNy is shown to be critical physical processes associated with phenomenon.