{"title":"热离子阴极最新进展","authors":"R. Forman","doi":"10.1109/IEDM.1991.235373","DOIUrl":null,"url":null,"abstract":"An update of progress in programs for improving thermionic cathode devices is presented. Innovative changes in the M-type impregnated cathode, specifically, the MM, CMM, MMM and transition metal emitters designed to preserve the initial cathode surface, are discussed. Also considered are low-cost high-brightness cathodes for high-definition television (HDTV), CPD types developed in the US and scandate types in Europe and Japan. High-temperature, high-brightness cathodes (LaB/sub 6/ and transition metal carbides) for lithographic or other unique applications are also discussed. Consideration is given to low-work-function cathodes (e.g. scandate) which can deliver 1-2 A/cm/sup 2/ at a much lower temperature than conventional impregnated cathodes and are capable of delivering pulsed currents in the range of 100 A/cm/sup 2/.<<ETX>>","PeriodicalId":13885,"journal":{"name":"International Electron Devices Meeting 1991 [Technical Digest]","volume":"14 1","pages":"387-390"},"PeriodicalIF":0.0000,"publicationDate":"1991-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"Update of thermionic cathode progress\",\"authors\":\"R. Forman\",\"doi\":\"10.1109/IEDM.1991.235373\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An update of progress in programs for improving thermionic cathode devices is presented. Innovative changes in the M-type impregnated cathode, specifically, the MM, CMM, MMM and transition metal emitters designed to preserve the initial cathode surface, are discussed. Also considered are low-cost high-brightness cathodes for high-definition television (HDTV), CPD types developed in the US and scandate types in Europe and Japan. High-temperature, high-brightness cathodes (LaB/sub 6/ and transition metal carbides) for lithographic or other unique applications are also discussed. Consideration is given to low-work-function cathodes (e.g. scandate) which can deliver 1-2 A/cm/sup 2/ at a much lower temperature than conventional impregnated cathodes and are capable of delivering pulsed currents in the range of 100 A/cm/sup 2/.<<ETX>>\",\"PeriodicalId\":13885,\"journal\":{\"name\":\"International Electron Devices Meeting 1991 [Technical Digest]\",\"volume\":\"14 1\",\"pages\":\"387-390\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1991-12-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Electron Devices Meeting 1991 [Technical Digest]\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IEDM.1991.235373\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Electron Devices Meeting 1991 [Technical Digest]","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IEDM.1991.235373","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An update of progress in programs for improving thermionic cathode devices is presented. Innovative changes in the M-type impregnated cathode, specifically, the MM, CMM, MMM and transition metal emitters designed to preserve the initial cathode surface, are discussed. Also considered are low-cost high-brightness cathodes for high-definition television (HDTV), CPD types developed in the US and scandate types in Europe and Japan. High-temperature, high-brightness cathodes (LaB/sub 6/ and transition metal carbides) for lithographic or other unique applications are also discussed. Consideration is given to low-work-function cathodes (e.g. scandate) which can deliver 1-2 A/cm/sup 2/ at a much lower temperature than conventional impregnated cathodes and are capable of delivering pulsed currents in the range of 100 A/cm/sup 2/.<>
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