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Iterative algorithm for interferometric retrieval of plasma density in case of considerably inhomogeneous objects

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00506383" target="_blank" >RIV/61389021:_____/19:00506383 - isvavai.cz</a>

  • Alternative codes found

    RIV/68378271:_____/19:00578977

  • Result on the web

    <a href="http://dx.doi.org/10.1088/1742-6596/1197/1/012002" target="_blank" >http://dx.doi.org/10.1088/1742-6596/1197/1/012002</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1088/1742-6596/1197/1/012002" target="_blank" >10.1088/1742-6596/1197/1/012002</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Iterative algorithm for interferometric retrieval of plasma density in case of considerably inhomogeneous objects

  • Original language description

    Interferometry is a widely used active diagnostic method for measurements of physical properties of plasmas. In case of axial symmetry of probed objects an Abel inversion can be used to retrieve plasma density profiles from phase shifts reconstructed from interferograms. This approach is based on the assumption of the diagnostic beam propagating along a straight line. However, it is well known that in case of inhomogeneous media the refraction process affects the diagnostic beam trajectory resulting in an inaccuracy of the retrieved density structure. In order to deal with this unfavourable effect a more sophisticated approach needs to be employed. In this paper a special iterative algorithm is proposed to deal with this issue. This algorithm turns the inversion procedure into series of iterations, where the appropriate distribution of plasma density is found by following the diagnostic beam actual trajectory during its propagation through the inhomogeneous medium. The assumption of axially symmetric plasma distribution still applies. The respective trajectories are calculated using the ray tracing method. This method also allows to use the paraxial wave equation. This iterative algorithm was tested on simulated data with different configurations of plasma density proving its functionality. Results from the simulated data analysis show that using this approach the effect of refraction can be fully compensated and plasma density is thus recovered accurately. Comparison with the results obtained only by the Abel inversion as such is provided for illustration.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Journal of Physics Conference Series

  • ISBN

  • ISSN

    1742-6588

  • e-ISSN

    1742-6596

  • Number of pages

    8

  • Pages from-to

    012002

  • Publisher name

    IOP Publishing

  • Place of publication

    Bristol

  • Event location

    Kudowa Zdroj

  • Event date

    Jun 4, 2018

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article

    000470810400002