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Numerical simulation of an expanding magnetic field plasma thruster: a comparative study for argon, xenon and iodine fuel gases

Published online by Cambridge University Press:  26 September 2024

Vinod Saini Open the ORCID record for Vinod Saini [Opens in a new window]  and
Rajaraman Ganesh Open the ORCID record for Rajaraman Ganesh [Opens in a new window]
Vinod Saini*
Affiliation:
Institute For Plasma Research, Gandhinagar 382428, India
Rajaraman Ganesh
Affiliation:
Institute For Plasma Research, Gandhinagar 382428, India Homi Bhabha National Institute (HBNI), Mumbai, Maharashtra 400094, India
*
†Email address for correspondence: [email protected]
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Abstract

During a space mission, switching to an electric propulsion system from chemical propulsion, once the spacecraft is out of the Earth's gravity, significantly reduces the mission's overall cost. In electric propulsion, the Hall thruster and gridded ion thruster are established technologies. These thrusters compromise mission longevity due to continuous erosion of the device electrode material. To overcome this issue, an electrode less expanding magnetic field plasma thruster or helicon plasma thruster (HPT), was proposed and research is on going worldwide. The HPT shows scaling of thrust with input power while Hall thrusters and ion thrusters do not. Typically, an inert xenon gas is used as a fuel in HPT devices due to a low ionization potential and non-hazardous nature. Xenon is not easily available in nature and during a space mission it needs to be stored in high pressure tanks. Recently, iodine has been proposed as an alternate to xenon as it is easily available and does not have any storage issues. In most of the numerical simulations, argon is used as a fuel gas to reduce the simulation cost. Using a 1D3V particle-in-cell Monte Carlo collision code, we present here a net thrust generation for different fuel gases such as argon, xenon and iodine. We compare plasma flow rates and directed ion beam velocity for different fuel gases having identical inputs. Thrust and plasma flow are investigated for different magnetic field gradients in the plasma expansion region for unidirectional and bidirectional HPT and is reported here. Using iodine fuel, a significant increase in net thrust is obtained for higher magnetic field divergence for identical simulation input parameters while comparing with xenon fueled cases.

Keywords

plasma simulationplasma applicationsplasma dynamics
Type
Research Article
Information
Journal of Plasma Physics , Volume 90 , Issue 4 , August 2024 , 905900411
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Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press

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