熱陰極發(fā)射特性的微機(jī)化測(cè)量和分析
MICROCOMPUTERIZED MEASUREMENT AND ANALYSIS OF ELECTRON EMISSION PROPERTIES OF THERMIONIC CATHODES
-
摘要: 本文介紹了一套微機(jī)化熱陰極發(fā)射特性測(cè)量系統(tǒng)。用它能快速自動(dòng)地獲取伏安特性數(shù)據(jù),精度為0.05％(滿(mǎn)標(biāo)量程),一條曲線(xiàn)所需時(shí)間少于5s,用它還能獲取Schottky外延零場(chǎng)發(fā)射、拐點(diǎn)發(fā)射、轉(zhuǎn)折點(diǎn)發(fā)射、平均有效逸出功、Richardson逸出功、工作溫度下陰極表面的逸出功分布等反映陰極特性的重要信息。 對(duì)四種陰極的研究結(jié)果表明,本系統(tǒng)特別適合于用來(lái)研究陰極激活、老煉、中毒和壽命過(guò)程中活性的變化。通過(guò)對(duì)一種柵控行波管的測(cè)量,證明本系統(tǒng)可用來(lái)監(jiān)測(cè)整管中陰極的活性。Abstract: A microcomputerized measuring system is developed. This system automatically acquires an I-V characteristic curve in 5 seconds with an accuracy of 0.05% (ful scale-range). The Schottky extrapolation field-free emission, the inflection point emission, the flection point emission, the average effective work, function, the Richardson .work function, the work function distribution at the operation temperature and other important informations that reflect properties of cathode are obtained by this system. The results after analysing four type of cathodes demonstrate that this system is very suitable for measuring the property changes of the cathode in the processes of activation, ageing, poisoning and life test. It is proved that this system can also be used to monitor the property of the eathode in the assembled tube by measuring a grid controlled travelling-wave tube.
-
W. P. C. Mills, et al., Int. J. Electronics, 31(1971), 145.[2]M. J. Cattelino, G. V. Miram, W. R. Ayers, IEDM. San Francisco. 1982, p.36.[3]M. Feinleib, M. C. Green, IEDM, San Francisco, 1984, p.314.[4]A. H. Beck and De-an Wang, Int. J Electronics, 51(1981), 717.[5]J. Hasker, Application of Surface Science, 16(1983), 220.[6]C. E. Maloney, C. S. Fang, Applied Surface Science, 24(1985), 407.[7]J. C. Tonnerre, D. Brion, P. Palluel, A. M. Shroff, Application of Surface Science, 16(1983), 238.[8]楊凌云, 王書(shū)紳, 電子學(xué)通訊, 4(1982), 384.[9]劉學(xué)愨,陰極電子學(xué),科學(xué)出版社,1980.[10]E. B. Hensley, J. Appl. Phys., 32(1961), 301.[11]American Standard Methods of Test Electron Tubes, American Standards Association Incorporated, 1963.[12]曾海山,熱發(fā)射測(cè)量微機(jī)化與實(shí)用熱陰極發(fā)射特性研究,中國(guó)科學(xué)院電子學(xué)研究所碩士論文,1986年9月. -
計(jì)量
- 文章訪(fǎng)問(wèn)數(shù): 1960
- HTML全文瀏覽量: 141
- PDF下載量: 507
- 被引次數(shù): 0
下載:
