【摘要】 本文叙述了一种比较新颖的整体式液体镓离子源的制备工艺及挂镓方法;测量了在不同温度下的电流-电压关系;以及在特定电压下,电流随时间的缓慢变化;对于针尖的几何形状,即顶点处的曲率半径对电流-电压关系的影响,用两种典型的针尖作了比较;试验还表明,这种源结构比较简单,容易实现和掌握,其寿命可达110小时以上.更多还原

【Abstract】 The techique of making a novel integral liquid gallium ion source and the methodof coating with gallium are described.The current vs.voltage relationships under va-rious temperatures are measured.The current changes slowly with time under a defi-nite voltage.The influence of the geometry of the needle tip,i.e. the radius of cur-vature at its apex,on the I-V relationship is investigated by comparison of two typ-ical needle tips.The experiments show that the construction of this source is simple,thereby it can be easily made and mastered,and its lifetime can reach over 110 n.更多还原