Browsing DFis-Artículos, capítulos, libros... by Title
Now showing items 58-77 of 135
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Heat pulse propagation and anomalous electron heat transport measurements on the optimized stellarator W7-X
(IOP Publishing, 2021)The optimized stellarator Wendelstein 7-X (W7-X) is designed to have an approximately quasi-isodynamic magnetic configuration with reduced neoclassical transport in comparison to a classical stellarator, and turbulent ... -
High-performance plasmas after pellet injections in Wendelstein 7-X
(IOP Publishing, 2020)A significant improvement of plasma parameters in the optimized stellarator W7-X is found after injections of frozen hydrogen pellets. The ion temperature in the post-pellet phase exceeds 3 keV with 5 MW of electron heating ... -
Impact of the temperature ratio on turbulent impurity transport in Wendelstein 7-X
(IOP Publishing, 2020)First experimental observations in the Wendelstein 7-X stellarator indicate that the impurity confinement can be explained by turbulent processes. In particular, plasma discharges with increased ion to electron temperature ... -
Increasing the production of high-quality graphene nanosheet powder: The impact of electromagnetic shielding of the reaction chamber on the TIAGO torch plasma approach
(Elsevier, 2024)Microwave-induced plasmas (MIPs), and specifically the TIAGO device (Torche à Injection Axiale sur Guide d’Ondes), offer a streamlined, cost-effective, and environmentally friendly technique for producing high-quality ... -
Influence of collisions in a fluid model for the warm-ion sheath around a cylindrical Langmuir probe
(IOP Publishing, 2019)A long cylindrical Langmuir probe immersed in a collisional plasma is modelled by using fluid equations in which the collision term is introduced assuming a constant ion mean free path. The physical magnitudes of the system ... -
Influence of gas flow on the axial distribution of densities, temperatures and thermodynamic equilibrium degree in surface-wave plasmas sustained at atmospheric pressure
(Elsevier, 2019)In this paper, a discussion about the influence of the gas flow on the axial distribution of plasma densities, temperatures and thermodynamic equilibrium degree in argon surface-wave discharges sustained at atmospheric ... -
Influence of the argon admixture on the reactive oxide species formation inside an atmospheric pressure oxygen plasma jet
(Nature, 2024-02-10)In this work, a new atmospheric pressure plasma generated in a wire-to-multiwire dielectric barrier discharge on pure oxygen is introduced. This special geometry of 13 wires (one central wire and 12 ones on the external ... -
Innovación docente en las jornadas de recepción de alumnado de E.S.O. y Bachillerato al Departamento de Física
(UCOPress, 2017)Este proyecto ha tratado de incorporar la participación de alumnos del Grado de Física, en concreto de 4º curso, en una de las actividades que se realizan en el Departamento de Física, las “Jornadas de recepción de alumnado ... -
Ion injection in electrostatic particle-in-cell simulations of the ion sheath
(2017)A particle injection algorithm has been developed for its use in electrostatic particle-in-cell (PIC) simulations of the ion sheath which takes place in the surroundings of a planar electrode immersed in a plasma when ... -
Ionization and excitation probabilities of a hydrogen atom suddenly released from penetrable confinement
(Taylor & Francis, 2018)The problem of the stability of the hydrogen atom when it is released from a confining environment is studied. The stability is analysed in terms of excitation and ionization probabilities of the final state for different ... -
Ionization probability of the hydrogen atom suddenly released from confinement
(Wiley, 2017)The problem of the stability of a confined atom when it is extracted from the confining cavity has been investigated, modeled by a spherical hard wall potential. The ionization probability when the atom is released from ... -
Isotopic effects on covalent bond confined in a penetrable sphere
(American Chemical Society, 2015)A model of confinement of the covalent bond by a finite potential beyond the Born−Oppenheimer approximation is presented. A two-electron molecule is located at the center of a penetrable spherical cavity. The Schrödinger ... -
LiH−(X2Σ+)+3,4He rotational quenching at ultralow energies: spin-flip and isotopic effects from quantum dynamics on an ionic system
(Springer, 2009)We study in this work the quantum scattering between a helium atom and a LiH− molecule at low and ultralow energies. For the noble gas we have considered the two natural isotopes 3He, 4He, plus a “mock” 3.5He. Our aim ... -
Local weather phenomenon Galerna influences daily radon concentrations in northern Iberian Peninsula
(Elsevier, 2024)One of the main factors that affect urban air quality is meteorology. The objective of this study is to understand and characterise the influence that “Galerna” (GL) (an abrupt westerly change over the northern coast of ... -
Low Electron Temperature Plasma Diagnosis: Revisiting Langmuir Electrostatic Probes
(MDPI, 2021)This article describes a method of measurement of the current-to-probe voltage characteristic curve of a Langmuir electrostatic probe immersed in a plasma characterized by a low electron temperature that is only one order ... -
Mars in situ oxygen and propellant production by non-equilibrium plasmas.
(2021)It has been recently advocated that Mars has excellent conditions for oxygen and fuel production directly from atmospheric CO2 using non-equilibrium plasmas. The Martian conditions would be favorable for vibrational ... -
Measuring the air fraction and the gas temperature in non-thermal argon plasma jets through the study of the air influence on the collisional broadening of some argon atomic emission lines
(IOP Publishing, 2020)Cold atmospheric argon plasma jets have shown to be very promising in medicine and they are being currently used for therapeutical uses such as the healing of wounds or the treatment of tumors. Because they run in the open ... -
Method of Moments Optimization of Distributed Raman Amplification in Fibers with Randomly Variying Birefringence
(MDPI, 2020)In this work, we develop a vectorial model, for optical communications, using distributed Raman amplification (DRA) applied to vectorial soliton pulses in monomode fiber optics. The main result, a dependent polarization ... -
Microwave atmospheric pressure plasma jets for wastewater treatment: Degradation of methylene blue as a model dye
(Elsevier, 2017)The degradation of methylene blue in aqueous solution as a model dye using a non thermal microwave (2.45 GHz) plasma jet at atmospheric pressure has been investigated. Argon has been used as feed gas and aqueous solutions ... -
Minimizing odor impact from urban waste by digital transformation in the city of Córdoba
(2024)Management of municipal urban waste remains challenging in societies and constitutes a key issue within the frame of “Smart cities” and sustainable development. Optimal schedule and operational procedure have traditionally ...