| 摘要 |
<p>The charged particles comprise electrons and positive ions. A magnetic field having only point cusps is used to confine injected electrons and so to generate a negative potential well (600). Positive ions injected into the negative potential well are trapped therein. The preferred means for generating the magnetic field is current-carrying elements (800) arranged at positions corresponding to the edges of any of several truncated regular polyhedrons.</p> |
