Direct measurement of the applied-field component of the thrust of a lithium lorentz force accelerator

William J. Coogan, Michael A. Hepler, Edgar Y. Choueiri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The operation of an inverted-pendulum thrust stand designed to directly measure the applied-field thrust component of a steady-state applied-field magnetoplasmadynamic thruster is presented. This measurement, which is necessary for improving and validat- ing thrust models, is achieved by mechanically isolating the solenoid from the thruster so that the solenoid can move independently. The deflection of the solenoid is compared to deflection by known forces to determine the applied-field thrust component. The thrust stand is found to be accurate to ±9 mN over a total range of 1200 mN. Two measurement methods are implemented to account for tare forces resulting from azimuthal currents to the thruster electrodes and are shown to agree with one another. As a proof-of-concept, the first direct measurements of the applied-field component of the thrust from a 30 kW lithium Lorentz force accelerator operating at 400 A, 8 mg/s lithium mass flow rate, and 0.056 T applied-field strength give a measured force of 108 ± 14 mN. This measurement agrees with the value predicted by measuring the total thrust and subtracting out all other thrust components.

Original languageEnglish (US)
Title of host publication52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104060
StatePublished - Jan 1 2016
Event52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016 - Salt Lake City, United States
Duration: Jul 25 2016Jul 27 2016

Publication series

Name52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016

Other

Other52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016
CountryUnited States
CitySalt Lake City
Period7/25/167/27/16

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Direct measurement of the applied-field component of the thrust of a lithium lorentz force accelerator'. Together they form a unique fingerprint.

  • Cite this

    Coogan, W. J., Hepler, M. A., & Choueiri, E. Y. (2016). Direct measurement of the applied-field component of the thrust of a lithium lorentz force accelerator. In 52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016 (52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016). American Institute of Aeronautics and Astronautics Inc, AIAA.