Ionization and acceleration separated double-cathode Hall thruster
A technology of Hall thruster and double cathode, which is applied in the direction of reverse thrust device, plasma utilization, machine/engine, etc. It can solve the problems of insufficient number of seed electrons, deterioration of ionization process and discharge performance, insufficient ionization, etc.
Inactive Publication Date: 2020-06-02
HARBIN INST OF TECH
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Problems solved by technology
[0004] There are two peak magnetic fields in the discharge channel of the double-peak magnetic field Hall thruster, and the magnetic field gradient is large. The electrons emitted by the cathode need to overcome the large magnetic resistance through the magnetic field of the discharge channel to reach the ionization area, so that the number of seed electrons in the ionization area is insufficient, and the ionization Insufficient and worsens the ionization process and discharge performance
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[0021] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0022] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0023] Such as Figure 1-Figure 3 As shown, a dual-cathode Hall thruster with separation of ionization and acceleration includes a thruster bracket 2, a ceramic discharge channel 3, an anode 7, an additional anode ring 11, an external cathode 10, an internal cathode 1, an external excitation coil 8 and The inner excitation coil 9, the ceramic discharge channel 3 is surrounded by two ceramic tubes of the same height that are connected at the bottom and coaxially arranged, and the two ceramic tubes are placed on the bottom of the thruster bracket 2, and the outer Both the exciting coil 8 and the inner exciting coil 9 are sleeved on the upper part of the thruster bracket 2, the inner excit...
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The invention provides an ionization and acceleration separated double-cathode Hall thruster which comprises a thruster support, a ceramic discharge channel, an anode, an additional anode ring, an external cathode, an internal cathode, an external magnet exciting coil and an internal magnet exciting coil. The external cathode is installed at the position close to outlet side magnetic field intensity peak, a support cathode installation hole and a discharge channel cathode installation hole are formed in the same side, the internal cathode sequentially penetrates through the support cathode installation hole and the discharge channel cathode installation hole and then extends into the ceramic discharge channel, the internal cathode is installed at the position close to an anode side magnetic field intensity peak, and the additional anode ring is installed at a zero magnetic point of the discharge channel. According to the ionization and acceleration separated double-cathode Hall thruster, the internal cathode is installed in the internal cathode to provide seed electrons, so that ionization regions are concentrated near the anode, ions are accelerated by using the additional anode ring, acceleration regions are concentrated near an outlet of the discharge channel, the ionization process and the acceleration process are separated, and electrons emitted by the external cathode areused for neutralizing plume.
Description
technical field [0001] The invention belongs to the technical field of Hall thrusters, in particular to a dual-cathode Hall thruster with ionization and accelerated separation. Background technique [0002] Hall Effect Thruster (HET for short) is an electric thruster that uses orthogonal electromagnetic fields to ionize and accelerate atomic working fluids, convert electrical energy into ion kinetic energy, and obtain higher specific impulse. It has the characteristics of simple structure, high specific impulse, high efficiency, long working life, high power density, long service time in orbit, etc. It is suitable for attitude control, orbit correction, orbit transfer, power compensation, position maintenance, Repositioning, off-orbit processing, space exploration and interstellar voyage and other tasks are currently the most widely used and most mature electric propulsion systems in the world. [0003] The working principle of the Hall thruster is that two ceramic sleeves ...
Claims
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IPC IPC(8): F03H1/00
CPCF03H1/0081F03H1/0075
Inventor 丁永杰魏立秋李鸿于达仁
Owner HARBIN INST OF TECH