{"title":"收敛电子束行波管噪声因子的降低","authors":"A. Danilov, S. Morev, A. D. Rafalovich","doi":"10.1109/IVEC.2003.1286401","DOIUrl":null,"url":null,"abstract":"This article describes the results of the work on reducing the noise factor submitted by means of choice the parameters of EOS for broadband traveling wave tube (TWT) with output level 100 W. For reduction the noise factor in this TWT has been increased at a sacrifice of the diameter of the cathode. Thus the amplitude of the magnetic field necessary for focusing the beam of a former has decreased. If P/sub input/ is greater than zero (P/sub input/ - output power), a noticeable dynamic defocusing took place (body current is greater than 10 mA). The dynamic defocusing has been suppressed due to the 1,2 times increase of the magnetic field at the end of the interaction space. The amplitude of the magnetic field was calculated. If the output power is equal to zero, the body current and the noise factor have not increased.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"60 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Reduction of noise factor in TWT with a convergent electron beam\",\"authors\":\"A. Danilov, S. Morev, A. D. Rafalovich\",\"doi\":\"10.1109/IVEC.2003.1286401\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This article describes the results of the work on reducing the noise factor submitted by means of choice the parameters of EOS for broadband traveling wave tube (TWT) with output level 100 W. For reduction the noise factor in this TWT has been increased at a sacrifice of the diameter of the cathode. Thus the amplitude of the magnetic field necessary for focusing the beam of a former has decreased. If P/sub input/ is greater than zero (P/sub input/ - output power), a noticeable dynamic defocusing took place (body current is greater than 10 mA). The dynamic defocusing has been suppressed due to the 1,2 times increase of the magnetic field at the end of the interaction space. The amplitude of the magnetic field was calculated. If the output power is equal to zero, the body current and the noise factor have not increased.\",\"PeriodicalId\":203178,\"journal\":{\"name\":\"4th IEEE International Conference on Vacuum Electronics, 2003\",\"volume\":\"60 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2003-05-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"4th IEEE International Conference on Vacuum Electronics, 2003\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IVEC.2003.1286401\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"4th IEEE International Conference on Vacuum Electronics, 2003","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IVEC.2003.1286401","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Reduction of noise factor in TWT with a convergent electron beam
This article describes the results of the work on reducing the noise factor submitted by means of choice the parameters of EOS for broadband traveling wave tube (TWT) with output level 100 W. For reduction the noise factor in this TWT has been increased at a sacrifice of the diameter of the cathode. Thus the amplitude of the magnetic field necessary for focusing the beam of a former has decreased. If P/sub input/ is greater than zero (P/sub input/ - output power), a noticeable dynamic defocusing took place (body current is greater than 10 mA). The dynamic defocusing has been suppressed due to the 1,2 times increase of the magnetic field at the end of the interaction space. The amplitude of the magnetic field was calculated. If the output power is equal to zero, the body current and the noise factor have not increased.
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