Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle
Spatial profiles of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle is revealed by using a momentum vector measurement instrument located downstream of a radiofrequency plasma source, where the radial and axial forces exerted to the detector plate facing the source side a...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab98d5 |
| _version_ | 1827873056490520576 |
|---|---|
| author | Kazunori Takahashi Takeharu Sugawara Akira Ando |
| author_facet | Kazunori Takahashi Takeharu Sugawara Akira Ando |
| author_sort | Kazunori Takahashi |
| collection | DOAJ |
| description | Spatial profiles of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle is revealed by using a momentum vector measurement instrument located downstream of a radiofrequency plasma source, where the radial and axial forces exerted to the detector plate facing the source side are independently, directly, and simultaneously obtained. It is shown that a conical structure having high electron temperature and plasma density is significantly responsible for the axial momentum flux, which corresponds to the thrust in an electric propulsion device. The radially outward momentum flux is detected at the outer region of the conical structure, where the electron pressure gradient is formed; implying that the ions are radially accelerated by an electric field. The increase in the radially integrated axial momentum flux along the axis is demonstrated, where the gain of the axial momentum flux occurs at the radially peripheral region of the plasma expanding along the magnetic nozzle. |
| first_indexed | 2024-03-12T16:33:09Z |
| format | Article |
| id | doaj.art-1a70447164c144c3a652e26a3ecf0207 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:33:09Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-1a70447164c144c3a652e26a3ecf02072023-08-08T15:24:16ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122707303410.1088/1367-2630/ab98d5Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzleKazunori Takahashi0https://orcid.org/0000-0001-5690-1893Takeharu Sugawara1Akira Ando2Department of Electrical Engineering, Tohoku University , Sendai 980-8579, JapanDepartment of Electrical Engineering, Tohoku University , Sendai 980-8579, JapanDepartment of Electrical Engineering, Tohoku University , Sendai 980-8579, JapanSpatial profiles of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle is revealed by using a momentum vector measurement instrument located downstream of a radiofrequency plasma source, where the radial and axial forces exerted to the detector plate facing the source side are independently, directly, and simultaneously obtained. It is shown that a conical structure having high electron temperature and plasma density is significantly responsible for the axial momentum flux, which corresponds to the thrust in an electric propulsion device. The radially outward momentum flux is detected at the outer region of the conical structure, where the electron pressure gradient is formed; implying that the ions are radially accelerated by an electric field. The increase in the radially integrated axial momentum flux along the axis is demonstrated, where the gain of the axial momentum flux occurs at the radially peripheral region of the plasma expanding along the magnetic nozzle.https://doi.org/10.1088/1367-2630/ab98d5momentum fluxmagnetic nozzleelectric propulsionradiofrequency plasmas |
| spellingShingle | Kazunori Takahashi Takeharu Sugawara Akira Ando Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle New Journal of Physics momentum flux magnetic nozzle electric propulsion radiofrequency plasmas |
| title | Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle |
| title_full | Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle |
| title_fullStr | Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle |
| title_full_unstemmed | Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle |
| title_short | Spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle |
| title_sort | spatial measurement of axial and radial momentum fluxes of a plasma expanding in a magnetic nozzle |
| topic | momentum flux magnetic nozzle electric propulsion radiofrequency plasmas |
| url | https://doi.org/10.1088/1367-2630/ab98d5 |
| work_keys_str_mv | AT kazunoritakahashi spatialmeasurementofaxialandradialmomentumfluxesofaplasmaexpandinginamagneticnozzle AT takeharusugawara spatialmeasurementofaxialandradialmomentumfluxesofaplasmaexpandinginamagneticnozzle AT akiraando spatialmeasurementofaxialandradialmomentumfluxesofaplasmaexpandinginamagneticnozzle |