Abstract:
Self-healing photocathode device comprising a photoemissive multi-alkali semiconductor comprising a multi-alkali antimonide having the formula AxBy C2Sb, where A, B and C are Group I alkali metals and x+y+z = 3; a nanostructured porous membrane, one surface of which is in direct contact with the multi-alkali semiconductor and the opposing surface of which is disposed toward the inside of a sealed reservoir, such that the porous membrane and the sealed reservoir form a volume which is maintained at low pressure; a temperature control means in contact with the porous membrane, wherein the temperature control means regulates the temperature of the porous membrane at 2000C or less; a source comprising elemental cesium which is releasable into the enclosed volume; and, a current conducting means attached to the source.
Abstract translation:包含具有式AxBy C2Sb的多碱锑化物的光发射多碱半导体的自愈合光电阴极装置,其中A,B和C是I族碱金属,x + y + z = 3; 纳米结构多孔膜,其一个表面与多碱半导体直接接触并且其相对表面设置在密封储存器的内部,使得多孔膜和密封储存器形成维持的体积 在低压下 与所述多孔膜接触的温度控制装置,其中所述温度控制装置将所述多孔膜的温度调节至200℃以下; 包含可释放到封闭容积中的元素铯的源; 以及附接到源的电流传导装置。
Abstract:
The present invention relates to an alkali metal generating agent and others for formation of a photo-cathode or a secondary-electron emitting surface capable of stably generating an alkali metal. The alkali metal generating agent is used in formation of a photo-cathode for emitting a photoelectron corresponding to incident light, or in formation of a secondary-electron emitting surface for emitting secondary electrons corresponding to an incident electron. Particularly, the alkali metal generating agent contains at least an oxidizer comprising at least one tungstate with an alkali metal ion as a counter cation, and a reducer for reducing the ion. An alkali metal generating device comprises at least the alkali metal generating agent and a case housing it, and the case is provided with a discharge port for discharging the vapor of the alkali metal.
Abstract:
A photomultiplier which can be easily made compact has a dynode unit constituted by stacking a plurality of stages of dynode plates in an electron incident direction in a vacuum container constituted by a housing and a base member integrally formed with the housing. Each dynode plate has an engaging member engaged with a connecting pin for applying a voltage at a side surface thereof. Through holes for guiding the connecting pins from the outside of the container are formed in the base member. Each engaging member is arranged not to overlap the remaining engaging members in the stacking direction of the dynode plates. The arrangement position of each engaging member and the arrangement position of the through hole for guiding the corresponding connecting pin to be connected are matched with each other.
Abstract:
A microchannel plate and method is disclosed. In a preferred embodiment the microchannel plate is a water of anisotropically etchable material having been subjected to a directionally applied flux of reactive particles against at least one face of the wafer in selected areas corresponding to microchannel locations. The flux removes material from the selected areas to produce microchannels in the wafer in accordance with the directionality of the applied flux.