| 摘要 |
<p>A vacuum tube has a housing with magnetic elements disposed adjacent to the housing, and the housing forms a vacuum space therein. A cathode and an anode are installed inside the housing. When an external power is supplied to the cathode and the anode, free electrons are generated in the housing. The magnetic elements may be permanent magnets made as fractions of the housing. The magnetic elements generates a magnetic field, and forms a three dimensional magnetic barrier in the housing. The barrier traps the electrons inside, and prevents the electrons from contacting the cathode and an anode as well as the housing or other internal elements of the vacuum tube. Accumulation of the electrons in the housing is achieved and may be utilized for various industrial applications.</p> |
