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Showing 1 to 9 of 9 for “"charge-exchange collisions"”.
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Ion collection by a conducting sphere in a magnetized or drifting collisional plasma
… of both space and terrestrial plasmas, where charge-exchange collisions can play an important role in ion collection. Further, background drifts or magnetic fields can significantly affect the ion collection by and the potential structure near such objects, and should therefore also be …
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Fully kinetic numerical modeling of a plasma thruster
… colli- sions, ion-neutral scattering and charge exchange collisions, and Coulomb collisions. The latter were also treated through a Langevin (stochastic) differential equation for the particle trajectories in velocity space. Ion-electron recombination was modeled at the boundaries, and …
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Interaction of trapped ions with trapped atoms
… from the MOT. We demonstrate the first collisions between trapped atoms and trapped ions in the Langevin collision regime between Yb+ and Yb. A measurement of the Langevin rate constant through charge-exchange collisions between [alpha]Yb+ and [beta]Yb over three orders of magnitude in …
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Hybrid approaches to quantum information using ions, atoms and photons
… and ions is measured by observing near-resonant charge-exchange collisions between Yb and Yb+ with a collision rate matching the classical Langevin cross-section. Momentum transfer between cold atoms and cold ions is observed via collisions of Yb+ ions with laser-cooled Rb atoms and a classical …
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Experimental classification of divertor detachment
… impurities, volumetric processes such as charge exchange collisions and recombination become dominant. These processes lead to a strong reduction of the ion flux and plasma pressure in front of the divertor target. Although the single physical mechanisms leading to detachment seem to be …
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Generation and Characterization of Energetic Neutral Beams for Surface Modification
… for modifying polymer substrates in a charge-less etching environment, without profile distortion.<br></br><br></br>A modified inductively coupled plasma source was constructed to characterize processing plasmas and generate a source of energetic neutral particles based upon the …
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Supersonic Constricted Plasma Flows
… Ar gas propellant within a constricted discharge chamber at 1 Torr using less than 10 W of radiofrequency power. The discharge can operate either continuously or in rapid pulsed mode since plasma breakdown initiates almost instantaneously on a μs time scale. The propellant is heated to …
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Supersonic Constricted Plasma Flows
… Ar gas propellant within a constricted discharge chamber at 1 Torr using less than 10 W of radiofrequency power. The discharge can operate either continuously or in rapid pulsed mode since plasma breakdown initiates almost instantaneously on a μs time scale. The propellant is heated to …
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CHAOS: A multi-GPU PIC-DSMC solver for modeling gas and plasma flows
… of fast beam ions and slow neutrals that undergo charge-exchange (CEX) reactions to produce slow ions and fast neutrals. These slow CEX ions are strongly influenced by the electric field induced between the ion plume and the thruster surface, resulting in a backflow of ions towards the critical …