| 摘要 |
PURPOSE:To prevent demagnetization of a magnet, by applying a coating, which enhances a rate of heat radiation, to one part or the whole part outside a discharge vessel of an ion thruster. CONSTITUTION:Xe gas is introduced into a discharge vessel 9 passing through in a hollow cathode 1 from a gas introducing system, and an electron, accelerated by an anode 2, collides against the Xe gas, generating ionizing plasma. A surface treatment 11, for instance, blacking surface treatment, which enhances a rate of heat radiation, is applied to the outside of the discharge vessel 9. The discharge vessel 9 enables its temperature to be maintained by transmitting discharge power as heat by heat radiation from the discharge vessel 9 to a thruster case 10, and demagnetization of a magnet can be prevented.
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