陰極發射率 的英文怎麼說
中文拼音 [yīnjífāshèlǜ]
陰極發射率
英文
cathode emissivity-
At present, feas have potential for use as an electron source in a wide variety of applications, including microwave power amplifiers ( such as twts, klystron ), flat panel displays, electron microscopy, and electron beam lithography
目前，場致發射陣列陰極的應用領域十分廣泛，主要包括微波器件（應用於twts ， klystron等） 、平板顯示器（ feds ） 、電子顯微鏡及電子束刻蝕系統等。其中，應用研究的焦點主要集中在平板顯示器和射頻功率放大器。In the primary experimental study, the microwave power, the microwave frequency, and the mode are measured, hie relations among the microwave radiation, the intensity of the magnetic field, the position of the magnetic coil, the amplitude of the beam current, and the a - k gap are investigated
在初步的微波實驗中，測試了微波的功率、頻率和模式，測試了磁場強度和線圈位置對微波輻射輸出的影響，測試了束流大小和陰陽極間距對微波輻射輸出的影響。實驗結果發現微波的功率和模式基本與模擬結果吻合，器件工作穩定，重復性良好。However, the most commonly used x - ray sources didn " t change much no matter in structure or theory, still using thermionic cathodes as electron sources. such conventional x - ray tubes have some defaults, such as big volume, low frequency response, demanding for supply to cathode that was also brittle
目前使用的x光源的基本特點是採用熱電子發射形式即採用熱燈絲作為電子發射源，在高壓加速下轟擊陽極產生x射線，這樣的光源體積較大，需要加熱陰極的電源，且對頻率響應慢。When these organic materials meet each other they may form exciplex which introduce new spectral lines and reduce original ones. we compared the spectra of samples ito / tvk : tpb / alg3 / al and ito / pvk : tpb / mgf / alg3 / al. we found that the spectrum from exciplex is much reduced
有機材料的載流子遷移率低，不可能實現碰撞離化，它的發光只能是和陰極射線管中的發光一樣，來源於從sioz加速出來的電子對有機材料的直接碰撞。According to experiments, lab6, with high conductivity, good heat stability and chemical stability, low work function, and active cathode appearance, has become an ideal material for field emission array cathodes
經試驗證明，六硼化鑭（ lab6 ）具有高導電率和良好的熱穩定性、化學穩定性、低功函數以及活性陰極表面，因此從理論上成為了場發射陰極的理想材料。In this paper ， first, the author drew some important conclusions by analyzing several technical factors and experimental conditions which would have great influence on the quality of diamond thin films during mpcvd process ， including gas proportion ， the power of microwave ， the plasma ' s location, the nucleation technique, etc. finally ， the author has successfully deposited nanocrystalline diamond thin films with 300nm crystal particles on the slick surface of silicon by using ch4 / h2 gases in the mpcvd system ， and the nanocrystalline diamond thin films was proved to have good field emission performance. all these researches will make the foundation for the field emission cathode of diamond films
本論文中，作者分析了mpcvd方法中氣源成分比、微波功率、等離子體球的位置、成核技術等各種工藝條件對金剛石薄膜質量的影響，並總結得到了一些有意義的結論；同時，在自行研製的mpcvd沉積系統上，於4 - 7kpa 、 1000左右的熱力學條件下，採用ch4 / h2氣源氣氛在光滑的硅襯底上制備出了晶粒尺寸在300納米以下的納米晶金剛石薄膜，測試得到了較好的薄膜場致電子發射性能，為金剛石薄膜場致發射冷陰極的研究工作打下了實驗基礎。When we produce field emitting cold cathodes, we must consider not only the work function, conductance, density, reliability and mission capability but also the demand of technique
在制備場發射陰極時，必須考慮到材料功函數、電導率、密度、熱穩定性、化學穩定性等因素對其發射性能的影響，同時要考慮材料對加工工藝上的要求。With the development of high power microwave tube, the theoretical and experiment investigation of the high performance cathode have been conducted. the research work includes how to prepare the high performance cathode and the effect of the based metal on the cathode emission, the measurement of the inner and surface fine structures of the cathode, the discussion of emission mechanism of thermionic cathode. after a lot of experiment, we finally determined the cathode preparation with an excellent emission
為了適應大功率微波管的發展，本文展開了對高性能（大電流密度、長壽命）陰極的研究，研究工作包括陰極制備工藝、鋇鎢陰極基金屬對陰極發射性能影響、以及鋇鎢陰極基底內部結構無損檢測及表面形貌檢測、鋇鎢陰極發射機理探討及應用四個方面的實驗和理論的研究。Using field emission cathode, x ray source can be made with several advantages : smaller volume and brighter, high frequency response, in - time turning on, etc. considering of the merits and potential markets, researching and fabricating miniature x - ray source is meaningful
由於突起數目大且尖端頂端電場強度高，因此產生很大的場發射電流密度。採用場發射陰極的x射線光源具有體積小，輻射強度高，頻率響應快，可以隨時開啟，無需預熱的優點。The structure of field emission triode is first simulated by magic. the tip height, tip position, tip curvature, gate aperture, and gate voltage are changed, to observe the emission current and the electron congregation
本課題首先採用magic軟體對三極體結構的尖錐場發射陰極進行了模擬計算，分別改變尖錐高度，錐尖位置，尖錐曲率半徑，柵極孔徑及柵極電壓，觀察陽極收集電流及電子束的會聚情況。Harmonized system of quality assessment for electronic components. blank detail specification. small power transmitting tubes of anode dissipation up to 1kw
電子元器件質量評估協調體系.空白詳細規范.陰極功率最高可達1 kw的小功率發射管分享友人