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Sputtering of Mo and Ag with xenon ions from a radio-frequency ion thruster

Buntrock, Leonie Johanna and Volkmar, Chris and Hannemann, Klaus (2021) Sputtering of Mo and Ag with xenon ions from a radio-frequency ion thruster. Review of Scientific Instruments, 92 (4), pp. 1-9. American Institute of Physics (AIP). doi: 10.1063/5.0031408. ISSN 0034-6748.

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[img] PDF - Only accessible within DLR - Published version

Official URL: https://aip.scitation.org/doi/10.1063/5.0031408


The goal of this work is to set up an electric propulsion (EP) sputtering test section as a feasibility study for ground-based sputter testing of spacecraft materials with a radio-frequency ion thruster. Such experiments deliver valuable data, which are scarce but highly desired to model EP-based space missions, for example, with the Spacecraft Plasma Interaction System in order to predict the performance and lifetime of spacecraft components. This study assessed if sufficient testing conditions can be met to produce reliable experimental material data in the future. Therefore, the thruster was operated at ion energies of 1.5 and 1.8 keV, and a quartz crystal microbalance (QCM) was installed to detect sputter deposition rates. Molybdenum (Mo) and silver (Ag) were chosen as sputter targets. Wafer substrates served as a passive sampling method to characterize the composition of sputtered material by Rutherford backscattering spectrometry. Additionally, sputtering simulations matching the experimental conditions were performed with the software SDTrimSP. We obtained comparable experimental and computational data, as measured sputter deposition rates lie within the simulated order of magnitude and to some extent show the predicted angular dependence. Analysis of the deposited sputter material revealed the formation of metal oxides, which requires a future adaption of the material specific QCM settings. Furthermore, the cooling system of the QCM sensor head was not sufficient, limiting the comparability of results.

Item URL in elib:https://elib.dlr.de/141772/
Document Type:Article
Additional Information:Review of Scientific Instruments, Volume 92, Issue 4, 045109 (2021)
Title:Sputtering of Mo and Ag with xenon ions from a radio-frequency ion thruster
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Buntrock, Leonie JohannaUNSPECIFIEDhttps://orcid.org/0000-0002-3193-3335UNSPECIFIED
Volkmar, ChrisUNSPECIFIEDhttps://orcid.org/0000-0002-5038-3834UNSPECIFIED
Hannemann, KlausUNSPECIFIEDhttps://orcid.org/0000-0002-9653-4087UNSPECIFIED
Date:20 April 2021
Journal or Publication Title:Review of Scientific Instruments
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-9
EditorsEmailEditor's ORCID iDORCID Put Code
Publisher:American Institute of Physics (AIP)
Keywords:Electric Propulsion; Sputtering; QCM; RIT; Experimental Setup; Simulations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Buntrock, Leonie
Deposited On:22 Apr 2021 10:54
Last Modified:04 Jul 2023 14:23

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