公开(公告)号：US06250070B1

公开(公告)日：2001-06-26

申请号：US09569708

申请日：2000-05-09

申请人： Kurt B. Kreiner ,  John R. Beattie ,  Alois Wittmann ,  Lewis S. Pilcher

发明人： Kurt B. Kreiner ,  John R. Beattie ,  Alois Wittmann ,  Lewis S. Pilcher

IPC分类号： F03H100

CPC分类号： H05H1/54 ,  F03H1/0043 ,  H01J27/024

摘要： An ion thruster has a source of a plasma, and an ion-optics system located in sufficient proximity to the source of the plasma to extract ions therefrom. The ion-optics system includes at least two grids arranged in a facing-but-spaced-apart relationship to each other, with each grid being axisymmetric about a grid axis. Each grid includes a peripheral region defining a grid plane perpendicular to the grid axis, a first region of curvature adjacent to the peripheral region, and a second region of curvature along the grid axis such that the first region of curvature lies between the second region of curvature and the peripheral region. The first region of curvature is a convexly curved segment of a first sphere relative to the grid plane, and the second region of curvature is a concavely curved segment of a second sphere relative to the grid plane.

摘要翻译： 离子推进器具有等离子体源，离子光学系统位于足够靠近等离子体源的位置以从其中提取离子。 离子光学系统包括至少两个彼此相对且间隔开的关系布置的网格，每个网格围绕网格轴线是对称的。 每个网格包括限定垂直于网格轴的网格平面的周边区域，与周边区域相邻的第一曲率区域和沿着网格轴线的第二曲率区域，使得第一曲率区域位于第二区域 曲率和周边区域。 所述第一曲率区域是第一球体相对于所述格子平面的凸曲面段，并且所述第二曲率区域是相对于所述格子平面的第二球体的凹曲曲线段。