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P: Fachverband Plasmaphysik

P 6: Poster I

P 6.20: Poster

Montag, 26. Februar 2024, 16:30–18:30, ELP 6: Foyer

Investigation of charge exchange collisions in an ion beam — •Philipp Georg Johannes Kropidlowski, Leo Zeidler, Thomas Trottenberg, and Holger Kersten — IEAP, Christian-Albrechts-Universität zu Kiel

Charge exchange collisions (CEX) play an important role in operation of ion beam sources for industrial applications and electric propulsion systems for space travel. CEX collisions convert part of the ions into a beam of fast neutral atoms.

Several diagnostic methods can be used to measure this phenomenon, like a combination of force probe [1] and Faraday cup [2]. In this contribution, we use a Faraday cup to measure the spatial electric current density of the beam ions. In addition, a force probe measures the momentum flux density of all energetic beam particles, including the neutrals generated by charge exchange collisions, which cannot be detected by a Faraday cup.

We present measurements in the beam of an inductively coupled plasma (ICP) gridded ion source.

[1] T. Trottenberg, A. Spethmann, and H. Kersten, EPJ Techn.

Instrum. 5, 3 (2018)

[2]J. Benedikt, H. Kersten, and A. Piel, Plasma Sources Sci.

Technol. 30, 033001 (2021)

Keywords: Ionbeam; Force probe; Faraday cup; Charge exchange collsisions