Understanding of anomalous transport in Hall thrusters
About this project
- Japan Grant Number
- JP18H03815
- Funding Program
- Grants-in-Aid for Scientific Research
- Funding organization
- Japan Society for the Promotion of Science
- Project/Area Number
- 18H03815
- Research Category
- Grant-in-Aid for Scientific Research (A)
- Allocation Type
-
- Single-year Grants
- Review Section / Research Field
-
- Medium-sized Section 24:Aerospace engineering, marine and maritime engineering, and related fields
- Research Institution
-
- Kyushu University
- Project Period (FY)
- 2018-04-01 〜 2022-03-31
- Project Status
- Completed
- Budget Amount*help
- 45,110,000 Yen (Direct Cost: 34,700,000 Yen Indirect Cost: 10,410,000 Yen)
Research Abstract
To understand anomalous electron transport in a Hall thruster, plasma turbulence inside the acceleration channel was observed using a E-band microwave interferometer. The dependence of the amplitude of the turbulence on magnetic flux density, and the relations between the turbulence and other plasma perturbations and between the turbulence and the discharge current, were investigated through power spectral density and bi-coherence analysis. The turbulence has a positive relation to the discharge current, leads to anomalous electron transport inside the acceleration channel, and is coupled with ionization instability. Low frequency perturbations (several hundred Hertz) were observed; this low frequency perturbation could be a key to suppressing plasma turbulence. In addition, we showed usefulness of the short pulse width laser (picosecond laser) diagnostics for the measurement inside the Hall thrusters.