Matches in SemOpenAlex for { <https://semopenalex.org/work/W4241591732> ?p ?o ?g. }
Showing items 1 to 48 of
48
with 100 items per page.
- W4241591732 abstract "This study addresses the optical performance of a plasma adaptive lens for aero-optical applications by using both axisymmetric and three-dimensional numerical simulations. Plasma adaptive lenses are based on the effects of free electrons on the phase velocity of incident light, which, in theory, can be used as a phase-conjugation mechanism. A closed cylindrical chamber filled with Argon plasma is used as a model lens into which a beam of light is launched. The plasma is sustained by applying a radio-frequency electric current through a coil that envelops the chamber. Four different operating conditions, ranging from low to high powers and induction frequencies, are employed in the simulations. The numerical simulations reveal complex hydrodynamic phenomena related to buoyant and electromagnetic laminar transport, which generate, respectively, large recirculating cells and wall-normal compression stresses in the form of local stagnation-point flows. In the axisymmetric simulations, the plasma motion is coupled with near-wall axial striations in the electron-density field, some of which propagate in the form of low-frequency traveling disturbances adjacent to vortical quadrupoles that are reminiscent of Taylor-Görtler flow structures in centrifugally unstable flows. Although the refractive-index fields obtained from axisymmetric simulations lead to smooth beam wavefronts, they are found to be unstable to azimuthal disturbances in three of the four three-dimensional cases considered. The azimuthal striations are optically detrimental, since they produce high-order angular aberrations that account for most of the beam wavefront error. A fourth case is computed at high input power and high induction frequency, which displays the best optical properties among all the three-dimensional simulations considered. In particular, the increase in induction frequency prevents local thermalization and leads to an axisymmetric distribution of electrons even after introduction of spatial disturbances. The results highlight the importance of accounting for spatial effects in the numerical computations when optical analyses of plasma lenses are pursued in this range of operating conditions." @default.
- W4241591732 created "2022-05-12" @default.
- W4241591732 date "2015-06-17" @default.
- W4241591732 modified "2023-09-28" @default.
- W4241591732 title "10.1063/1.4922477.2" @default.
- W4241591732 doi "https://doi.org/10.1063/1.4922477.2" @default.
- W4241591732 hasPublicationYear "2015" @default.
- W4241591732 type Work @default.
- W4241591732 citedByCount "0" @default.
- W4241591732 crossrefType "dataset" @default.
- W4241591732 hasConcept C120665830 @default.
- W4241591732 hasConcept C121332964 @default.
- W4241591732 hasConcept C15336307 @default.
- W4241591732 hasConcept C165699331 @default.
- W4241591732 hasConcept C168834538 @default.
- W4241591732 hasConcept C30403606 @default.
- W4241591732 hasConcept C33026886 @default.
- W4241591732 hasConcept C57879066 @default.
- W4241591732 hasConcept C62520636 @default.
- W4241591732 hasConcept C76563973 @default.
- W4241591732 hasConcept C82706917 @default.
- W4241591732 hasConceptScore W4241591732C120665830 @default.
- W4241591732 hasConceptScore W4241591732C121332964 @default.
- W4241591732 hasConceptScore W4241591732C15336307 @default.
- W4241591732 hasConceptScore W4241591732C165699331 @default.
- W4241591732 hasConceptScore W4241591732C168834538 @default.
- W4241591732 hasConceptScore W4241591732C30403606 @default.
- W4241591732 hasConceptScore W4241591732C33026886 @default.
- W4241591732 hasConceptScore W4241591732C57879066 @default.
- W4241591732 hasConceptScore W4241591732C62520636 @default.
- W4241591732 hasConceptScore W4241591732C76563973 @default.
- W4241591732 hasConceptScore W4241591732C82706917 @default.
- W4241591732 hasLocation W42415917321 @default.
- W4241591732 hasOpenAccess W4241591732 @default.
- W4241591732 hasPrimaryLocation W42415917321 @default.
- W4241591732 hasRelatedWork W1980641539 @default.
- W4241591732 hasRelatedWork W1991646189 @default.
- W4241591732 hasRelatedWork W2032039204 @default.
- W4241591732 hasRelatedWork W2046617257 @default.
- W4241591732 hasRelatedWork W2059330617 @default.
- W4241591732 hasRelatedWork W2298425537 @default.
- W4241591732 hasRelatedWork W2513182638 @default.
- W4241591732 hasRelatedWork W2897138569 @default.
- W4241591732 hasRelatedWork W3092860501 @default.
- W4241591732 hasRelatedWork W3113128114 @default.
- W4241591732 isParatext "false" @default.
- W4241591732 isRetracted "false" @default.
- W4241591732 workType "dataset" @default.