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1. 发明授权

US4700068A Apparatus and method for spatially characterizing and controlling a particle beam 失效
标题翻译：用于空间表征和控制粒子束的装置和方法
公开(公告)号：US4700068A
公开(公告)日：1987-10-13
申请号：US824485
申请日：1986-01-31
申请人： Frederick J. McClung, Jr. , James G. Small
发明人： Frederick J. McClung, Jr. , James G. Small
IPC分类号： F28F3/08 , F28F3/10 , G01T1/29 , G01T3/00 , G21K1/14 , H01J47/12 , H05H3/02 , H01S1/00 , H01J37/147
CPC分类号： F28F3/083 , G01T1/29 , G21K1/14 , H05H3/02
摘要： A system and method is described for obtaining a spatial characterization of a particle beam, including the beam direction, position, divergence, aberrations and intensity profile. A mechanism is also provided for adjusting the beam propagation to a desired state in response to the sensed characteristics. A fiber array in the path of a neutral particle beam casts shadows which are sensed at a downstream location to characterize the beam. Various mechanisms can be used to sense the shadow positions and/or widths relative to the fibers, from which the various beam characteristics can be derived. By magnetically removing charged particles from the neutral beam shadows, the shadows can be sensed by their effect upon the secondary emission currents generated in downstream conducting sensor wires, by their effect upon the fluorescence of downstream optical fibers, or by their effect upon the thermal heating of various types of downstream heat sensors. The shadows can also be sensed directly by the differences in their spectral radiation compared to that of the beam. A very high degree of precision is obtained in directing the beam, while initial coarse measurements and adjustments can be derived by providing the fiber array as a grid of conductive wires and sensing differentials in the secondary emission currents generated in the various wires.
摘要翻译：描述了一种用于获得粒子束的空间表征的系统和方法，包括波束方向，位置，发散度，像差和强度分布。还提供了一种用于响应于感测到的特性将光束传播调节到期望状态的机构。在中性粒子束的路径中的光纤阵列投射在下游位置感测的阴影以表征光束。可以使用各种机制来感测相对于纤维的阴影位置和/或宽度，从该光纤可以导出各种光束特性。通过从中性光束阴影磁性去除带电粒子，可以通过它们对下游导电传感器线中产生的二次发射电流的影响来检测阴影，通过它们对下游光纤的荧光的影响，或者通过它们对热加热的影响的各种下游热传感器。阴影也可以通过与光束相比其光谱辐射的差异直接感测。在引导光束时获得非常高的精确度，而可以通过将光纤阵列提供为导线网格并且在各种导线中产生的二次发射电流中感测差分来导出初始粗略测量和调整。

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