同一空间的静电聚焦与偏转场

AN ELECTROSTATIC FIELD OF FOCUSING AND DEFLECTION IN THE SAME SPACE

迄今为止,还没有一种电子光学系统能将带电粒子的静电聚焦场与偏转场位于同一空间.本文则证明在同一封闭几何边界上如叠加两种规定的连续电位,可以在同一空间产生两种相应的场.例如采用简单正方形几何截面的连续线性变化电位边界作为四极场式的聚焦结构时,可以同时叠加x、y偏转场.初步的电子光学实验也证明这种设想是正确的,如在示波管工艺上得到应用则可缩短全管的长度.

Until recently no electrode system can generate both electrostatic focusing field and deflecting field in the same space without any interference. Yet this can be done if some proper continuously varying potentials that satisfy two individual field requirements are applied on the boundaries of a closed structure. For instance, a new electrostatic quadrupole of square cross-section can be used as a focusing lens and for x-y deflection simultaneously. Preliminary results of the electron-optical experiment show that the proposed structure is correct.