Multi-channel photomultiplier tube
阅读：463发布：2023-05-29
专利汇可以提供Multi-channel photomultiplier tube专利检索，专利查询，专利分析的服务。并且The improved photomultiplier tube utilizes a multi-channel structure within a common envelope. A photocathode and a plurality of dynode members each have barrier means associated therewith to effect a plurality of related-area elements on each member providing a plurality of separate photomultiplier channel areas thereon. The anode structure has a separate anode element for each individual channel with a separate electrical connection extending therefrom. The photocathode and the separate dynode members each have individual electrical connections which are common to the related channel areas respectively formed thereon.，下面是Multi-channel photomultiplier tube专利的具体信息内容。
1. A multi-channel photomultiplier structure enclosed in a common envelope having a window area, said structure comprising: a formed photocathode member having an active surface with a primary emissive material disposed thereon, said photocathode member being positioned in said envelope in a manner that said active surface is oriented to receive incident luminous energy beamed through the related window-area of said envelope, said photocathode having an externally extending electrical connection; a plurality of formed dynode members spatially positioned in discrete parallel relationship with one another to provide unobstructed deflective electron paths sequentially therebetween, the first of said dynode members being spatially and parallelly positioned relative to said photocathode member to receive substantially primary emission therefrom, each dynode member having an individual externally extending electrical connection and an active surface with secondary emissive material disposed thereon, each dynode member having at least one band-like electron separator area of non-emissive material similarly disposed thereon to effect a plurality of isolated substantially like-area dynode elements on each dynode member, said respective dynode elements being positionally and collectively related to define a plurality of separate photomultiplier channels; a formed anode structure parallElly related to the final of said dynode members, said anode structure having an individually defined and isolated anode element for each of said channels, each of said anode elements having a separate externally extending electrical connection; and barrier means associated with said photocathode member to provide for the reception of a plurality of discrete areas of input luminous energy.
2. A multi-channel photomultiplier structure according to claim 1 wherein said barrier means associated with said photocathode member is in the form of at least one band-like separator area of non-emissive material disposed on the active surface of said photocathode to effect a plurality of separate primary emissive areas thereon.
3. A multi-channel photomultiplier structure according to claim 2 wherein said non-emissive separator areas are of a material exhibiting low secondary emission characteristics.
4. A multi-channel photomultiplier structure according to claim 3 wherein said non-emissive separator areas are of at least one material selected from the group consisting of carbon, gold, silicon, silver, titanium, nickel oxide and silicon oxide.
5. A multi-channel photomultiplier structure according to claim 1 wherein said band-like non-emissive separator areas are of a width determined by the formula: (1) Sw min. dy max. Vy X Tt whereof: (2) Vy Square Root 2Elm Sw min. minimum width of separator area (B) in cm. dy max. maximum travel of electron (e) in substantially the Y direction in cm. Vy velocity of electron (e) in substantially the Y direction in cm./sec. E energy of electron (e) expressed in ergs. m mass of electron (e) in grams. Tt transit time per stage in m sec.
6. A multi-channel photomultiplier structure according to claim 1 wherein said barrier means is oriented on the active surface of said photocathode in the form of at least one band-like separator area of non-emissive material to effect a plurality of isolated substantially like-area cathode elements thereon.
7. A multi-channel photomultiplier structure according to claim 1 wherein said barrier means associated with said photocathode member is in the form of a mask of opaque non-emissive material having at least two related apertures therein, said mask being oriented in spatial relationship to the active surface of said photocathode member to segregate at least two separate luminous energy inputs on separated areas of said photocathode surface.
8. A multi-channel photomultiplier structure according to claim 6 wherein said discretely apertured barrier means is oriented within said envelope.
9. A multi-channel photomultiplier structure according to claim 6 wherein said discretely apertured barrier means is oriented exteriorly of said envelope.
10. A multi-channel photomultiplier structure according to claim 1 wherein said photocathode member has a grid member positioned in front of said photocathode in a manner that said luminous energy passes therethrough to impinge on said active photocathode surface, said photocathode and grid members being at a common potential.
11. A multi-channel photomultiplier structure according to claim 1 wherein the individually defined anode elements of said anode structure are separated by insulative spacers, said spacers having lengths substantially equalling the widths of said dynode separator areas.
12. A multi-channel photomultiplier structure according to claim 1 wherein three separate channels are provided to handle the input energies of additive primary hues.
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