| 摘要 |
PURPOSE:To get rid of necessitation to form a discharge vessel with insulator quarts glass as well as to aim at prevention against breakdown, by setting up an induction coil inside the discharge vessel, while covering this coil with a magnetic field, and preventing it from coming into contact with a plasma coil. CONSTITUTION:When the electron accelerated by an induction coil 6 collides with the Hg gas led into a discharge vessel 2 from a gas intake system 1, ionizing plasma is formed inside a discharge chamber 8. If so, Hg<+> ion is given kinetic energy by accelerating electrodes 3-5 and, after being neutralized by an electron to be emitted out of a neutralizer 7, discharged out, becoming impel lent force for an ion engine. At the abovementioned, the induction coil 6 is installed inside the discharge chamber 8. And, a magnet 9 is set up on a wall of the discharge vessel 2 so as to cause a magnetic line of force inside the discharge 8 to make up a magnetic cusp annular line around the induction coil 6. With this constitution, plasma is prevented from coming into contact with the induction coil 6. :a: Hg gas. |
