Method for the erosion rate measurements of stationary plasma thruster insulators

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.99295

Keywords:

stationary plasma thruster, optical emission spectroscopy, discharge chamber, relative erosion rate

Abstract

Despite the fact that for many years the stationary plasma thruster (SPT) has been used in space, this technology has not yet been fully studied. One of the research directions to improve SPT characteristics is the increase of thruster lifetime. This can be achieved with the research of the discharge chamber (DCh) walls erosion rate as a function of different thruster operational modes.

The analysis of the SPT DCh wear rate diagnostics methods was carried out. It is shown that the considered methods cannot provide measurements of the insulators erosion rate separately during the experiment.

The method of optical emission spectroscopy with plasma scanning through collimator (OESSC) was developed. The method allows registration of radiation separately for each of SPT DCh walls directly during the experiment. According to this, the experimental time of different SPT operational regimes research was reduced by 98 %.

Experimental equipment of the OESSC method was developed, produced and tested. It consists of the high-resolution spectral block with the range of 240...820 nm and the optical detector positioning system.

A set of experiments were provided with the OESSC method. As a result, the inner and outer insulators erosion rates are researched as functions of thruster operational regimes. It is shown that for the outer and inner coils currents of 5 and 6 A, respectively, there is a uniform wear of DCh walls. For such SPT operational regime, the difference in the insulators specific relative erosion rates is 2 %.

The results of the OESSC method measurements allowed increasing the anode block lifetime significantly

Author Biographies

Alona Khaustova, National Aerospace University named after M. Zhukovsky Kharkiv Aviation Institute Chkalova str., 17, Kharkiv, Ukraine, 61070

Postgraduate Student

Department of Electric Propulsion Thrusters

Andrej Loyan, National Aerospace University named after M. Zhukovsky Kharkiv Aviation Institute Chkalova str., 17, Kharkiv, Ukraine, 61070

Senior Researcher

Department of Electric Propulsion Thrusters

References

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Published

2017-06-30

How to Cite

Khaustova, A., & Loyan, A. (2017). Method for the erosion rate measurements of stationary plasma thruster insulators. Eastern-European Journal of Enterprise Technologies, 3(5 (87), 11–17. https://doi.org/10.15587/1729-4061.2017.99295

Issue

Vol. 3 No. 5 (87) (2017): Applied physics

Section

Applied physics

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Copyright (c) 2017 Alona Khaustova, Andrej Loyan

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