Pulsed thrust measurements using electromagnetic calibration techniques
A thrust stand for accurately measuring impulse bits, which ranged from 10-1000 μN s using a noncontact electromagnetic calibration technique is described. In particular, a permanent magnet structure was designed to produce a uniform magnetic field, and a multiturn coil was made to produce a calibra...
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Published in | Review of scientific instruments Vol. 82; no. 3; p. 035118 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.03.2011
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Online Access | Get more information |
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Summary: | A thrust stand for accurately measuring impulse bits, which ranged from 10-1000 μN s using a noncontact electromagnetic calibration technique is described. In particular, a permanent magnet structure was designed to produce a uniform magnetic field, and a multiturn coil was made to produce a calibration force less than 10 mN. The electromagnetic calibration force for pulsed thrust measurements was linear to the coil current and changed less than 2.5% when the distance between the coil and magnet changed 6 mm. A pulsed plasma thruster was first tested on the thrust stand, and afterward five single impulse bits were measured to give a 310 μN s average impulse bit. Uncertainty of the measured impulse bit was analyzed to evaluate the quality of the measurement and was found to be 10 μN s with 95% credibility. |
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ISSN: | 1089-7623 |
DOI: | 10.1063/1.3567803 |