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Direct-current current transformer for the measurement of an electric propulsion ion beam

Volkmar, Chris and Geile, Christopher and Neumann, Andreas and Hannemann, Klaus (2019) Direct-current current transformer for the measurement of an electric propulsion ion beam. Review of Scientific Instruments, 90 (3), 033303. American Institute of Physics (AIP). DOI: 10.1063/1.5087804 ISSN 0034-6748

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://aip.scitation.org/doi/10.1063/1.5087804


An important task in the development of electric propulsion devices is ground-based testing. In order to characterize electric thrusters, their generated ion beams are regarded as figures of merit and have to be well-known and understood. We present an approach to measure DC ion beam currents generated by electric thrusters by means of an inductive direct-current current transformer. In contrast to commonly used devices like Faraday cups, this device can measure the beam current non-intrusively by means of magnetic field coupling rather than charge collection. This paper shows the development of a prototype sensor which can measure currents in the typical range for electric thrusters with high resolution and satisfactory accuracy. A detailed SPICE model to assist during hardware development is also introduced and verified by test case measurements. The prototype has been tested and validated with a radio-frequency ion thruster. Its readout shows very good agreement with the output of an analytical model which computes a Gaussian-shaped ion beam in the far-field based on experimental input data.

Item URL in elib:https://elib.dlr.de/125623/
Document Type:Article
Title:Direct-current current transformer for the measurement of an electric propulsion ion beam
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Volkmar, Chrischris.volkmar (at) dlr.dehttps://orcid.org/0000-0002-5038-3834
Geile, Christopherchristopher.geile (at) dlr.deUNSPECIFIED
Neumann, AndreasA.Neumann (at) dlr.deUNSPECIFIED
Hannemann, KlausKlaus.Hannemann (at) dlr.deUNSPECIFIED
Date:12 March 2019
Journal or Publication Title:Review of Scientific Instruments
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1063/1.5087804
Page Range:033303
UNSPECIFIEDAmerican Institute of Physics
Publisher:American Institute of Physics (AIP)
Keywords:Ion beam measurement, direct-current current transformer, electric propulsion
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Anlagen u. Messtechnik
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Deposited By: Volkmar, Dr. Chris
Deposited On:13 Apr 2019 15:03
Last Modified:06 Sep 2019 15:29

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