Optimization, Test and Diagnostics of Miniaturized Hall Thrusters
| Autor: | Luxiang Xu, Svitlana Levchenko, George Potrivitu, Yu Fei Sun, S. Xu, Jian W. M. Lim, Igor Levchenko, Kateryna Bazaka, Muhammad Wisnuh Aggriawan bin Rohaizat, Youmei Wang, Roysmond Z. W. Sim, Shiyong Huang, Jen S. Yee |
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| Rok vydání: | 2019 |
| Předmět: |
General Chemical Engineering
Acceleration Thrust 02 engineering and technology Propulsion 01 natural sciences General Biochemistry Genetics and Molecular Biology 0103 physical sciences Aerospace engineering Spacecraft Vehicle Emissions 010302 applied physics Physics Miniaturization General Immunology and Microbiology business.industry General Neuroscience Temperature Equipment Design 021001 nanoscience & nanotechnology Electrically powered spacecraft propulsion Specific impulse Gases 0210 nano-technology business Voltage Nominal power (photovoltaic) |
| Zdroj: | Journal of visualized experiments : JoVE. (144) |
| ISSN: | 1940-087X |
| Popis: | Miniaturized spacecraft and satellites require smart, highly efficient and durable low-thrust thrusters, capable of extended, reliable operation without attendance and adjustment. Thermochemical thrusters which utilize thermodynamic properties of gases as a means of acceleration have physical limitations on their exhaust gas velocity, resulting in low efficiency. Moreover, these engines demonstrate extremely low efficiency at small thrusts and may be unsuitable for continuously operating systems which provide real-time adaptive control of the spacecraft orientation, velocity and position. In contrast, electric propulsion systems which use electromagnetic fields to accelerate ionized gases (i.e., plasmas) do not have any physical limitation in terms of exhaust velocity, allowing virtually any mass efficiency and specific impulse. Low-thrust Hall thrusters have a lifetime of several thousand hours. Their discharge voltage ranges between 100 and 300 V, operating at a nominal power of |
| Databáze: | OpenAIRE |
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