The plasma-induced magnetic field in an electron cyclotron resonance plasma thruster is measured non-intrusively by means of a diamagnetic loop that encloses the plasma flow. The calibration process is described, and parasitic currents in the thruster walls and plasma oscillations are identified as the dominant sources of uncertainty. The integrated magnetic flux is seen to depend on the applied power and less significantly on the mass flow rate. The effect of the diamagnetic loop radius is also studied by testing two loops of different diameters. To estimate the perpendicular electron pressure in the plasma from the loop measurements, two plasma beam models, 1D and 2D, are used. While both models give similar results for the small loop, they differ significantly for the large loop, showing the relevance of 2D effects when a large diamagnetic loop is used.
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May 2019
Research Article|
May 29 2019
Characterization of diamagnetism inside an ECR thruster with a diamagnetic loop
S. Correyero
;
1
Equipo de Propulsión Espacial y Plasmas, Universidad Carlos III de Madrid
, Leganés 28911, Spain
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M. Merino
;
M. Merino
1
Equipo de Propulsión Espacial y Plasmas, Universidad Carlos III de Madrid
, Leganés 28911, Spain
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Paul-Quentin Elias
;
Paul-Quentin Elias
2
ONERA, The French Aerospace Laboratory
, Palaiseau, Paris 91120, France
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J. Jarrige;
J. Jarrige
2
ONERA, The French Aerospace Laboratory
, Palaiseau, Paris 91120, France
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D. Packan;
D. Packan
2
ONERA, The French Aerospace Laboratory
, Palaiseau, Paris 91120, France
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E. Ahedo
E. Ahedo
1
Equipo de Propulsión Espacial y Plasmas, Universidad Carlos III de Madrid
, Leganés 28911, Spain
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a)
Email: scorreye@uc3m.es
Phys. Plasmas 26, 053511 (2019)
Article history
Received:
February 26 2019
Accepted:
May 07 2019
Citation
S. Correyero, M. Merino, Paul-Quentin Elias, J. Jarrige, D. Packan, E. Ahedo; Characterization of diamagnetism inside an ECR thruster with a diamagnetic loop. Phys. Plasmas 1 May 2019; 26 (5): 053511. https://doi.org/10.1063/1.5093980
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