专利名称：SEGMENTED GATE DRIVE FOR DYNAMIC BEAM SHAPE CORRECTION IN FIELD四年级上册英语单词
只为找到你EMISSION CATHODES
山路崎岖
发明人：JAMISON, Keith, D.,PATTERSON, Donald, E.申请号：US2000035485
厦门花生汤申请日：20001228
不薄今人爱古人公开号：WO01/050491P1
公开日：
聚会的目的是什么20010712
晕车药的副作用
专利内容由知识产权出版社提供
摘要：A field emission cathode providing for dynamic adjustment of beam shape is disclod. Beam shape adjustment is accomplished by gmenting the gate electrode (17) of a gated field emission cathode and independently driving the various gate gments to form the desired beam shape. Segments can be turned on and off as the beam is deflected allowing the dynamic correction of aberrations in the beam. A focus lens (32) can be placed on the gated cathode to produce a parallel electron beam. In addition, a hollow cathode can be produced to minimize space charge repulsion in a beam.
申请人：EXTREME DEVICES INCORPORATED
地址：US
亲戚不计较国籍：US
代理机构：COOKE, Claude, E., Jr.
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