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  Untersuchung von K-LL-Resonanzen dielektronischer Rekombination und simultaner Innerschalen-Vakuum-Ultraviolett Übergänge in hochgeladenem Eisen mit einer Elektronenstrahl- Ionenfalle

Dobrodey, S. (2014). Untersuchung von K-LL-Resonanzen dielektronischer Rekombination und simultaner Innerschalen-Vakuum-Ultraviolett Übergänge in hochgeladenem Eisen mit einer Elektronenstrahl- Ionenfalle. Master Thesis, Ruprecht-Karls-Universität, Heidelberg.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-5824-5 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0024-5825-3
Genre: Thesis

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Masterarbeit_Dobrodey.pdf (Publisher version), 27MB
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 Creators:
Dobrodey, Stepan1, Author           
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1Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society, ou_2025284              

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 Abstract: In the framework of this master thesis measurements of dielectronic recombination (DR) on highly charged iron are presented using an electron beam ion trap (EBIT) measured by varying the electron beam energy and detecting fluorescence. K-LL resonances have usually been studied by observing the K-L X-ray transitions. With the setup presented observations of simultaneous inner-shell transitions in the VUV range become possible. The X-ray spectra of resonant recombination are acquired with a silicon drift detector (SDD). The VUV spectra are simultaneously obtained using a grating spectrometer equipped with a microchannel plate (MCP) and a delay line anode. This allows a timeresolved, as well as a wavelength-resolved detection of the VUV photons. The intensity of the spectral lines can be recorded as a function of the electron beam energy and thus related to the K-LL resonances. First measurements were performed with highly charged iron VUV spectra were used for the indirect observation of changes in charge state. In such a way it was demonstrated that it is possible to use DR resonances to increase the population in the charge state Fe23+ by a factor of 3;37(5) and in Fe22+ by a factor of 2;8(2). For future experiments this setup will be used to measure charge state distritutions and to study photonic relaxation after resonant recombination in more detail.

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Language(s): deu - German
 Dates: 2014
 Publication Status: Accepted / In Press
 Pages: 96 S. : Ill., graph. Darst.
 Publishing info: Heidelberg : Ruprecht-Karls-Universität
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 Rev. Type: -
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 Degree: Master

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